/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-fpi/res1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:58:23,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:58:23,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:58:23,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 19:58:23,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 19:58:23,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 19:58:23,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 19:58:23,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 19:58:23,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 19:58:23,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 19:58:23,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 19:58:23,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 19:58:23,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:58:23,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:58:23,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:58:23,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:58:23,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:58:23,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:58:23,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:58:23,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:58:23,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:58:23,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:58:23,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:58:23,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:58:23,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:58:23,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:58:23,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:58:23,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:58:23,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 19:58:24,006 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:58:24,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:58:24,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:58:24,007 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:58:24,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:58:24,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:58:24,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:58:24,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:58:24,008 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:58:24,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:58:24,008 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:58:24,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:58:24,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:58:24,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:58:24,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:58:24,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:58:24,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:58:24,012 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:58:24,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:58:24,013 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:58:24,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:58:24,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:58:24,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:58:24,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:58:24,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:58:24,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:58:24,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:58:24,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:58:24,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:58:24,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:58:24,015 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:58:24,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:58:24,015 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:58:24,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:58:24,015 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:58:24,015 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:58:24,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:58:24,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:58:24,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:58:24,216 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:58:24,217 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:58:24,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res1.c [2023-04-01 19:58:25,298 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:58:25,466 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:58:25,466 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res1.c [2023-04-01 19:58:25,471 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f80df1ae/17f3be9e2cff4fda98df8f8162cc2228/FLAG40b8faca1 [2023-04-01 19:58:25,484 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f80df1ae/17f3be9e2cff4fda98df8f8162cc2228 [2023-04-01 19:58:25,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:58:25,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:58:25,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:58:25,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:58:25,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:58:25,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e161d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25, skipping insertion in model container [2023-04-01 19:58:25,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:58:25,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:58:25,615 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-fpi/res1.c[587,600] [2023-04-01 19:58:25,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:58:25,639 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:58:25,647 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-fpi/res1.c[587,600] [2023-04-01 19:58:25,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:58:25,662 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:58:25,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25 WrapperNode [2023-04-01 19:58:25,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:58:25,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:58:25,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:58:25,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:58:25,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:58:25,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:58:25,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:58:25,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:58:25,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (1/1) ... [2023-04-01 19:58:25,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:58:25,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:58:25,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 19:58:25,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 19:58:25,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:58:25,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:58:25,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:58:25,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:58:25,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:58:25,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:58:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:58:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 19:58:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:58:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:58:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:58:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:58:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:58:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:58:25,854 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:58:25,855 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:58:25,982 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:58:25,986 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:58:25,986 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 19:58:25,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:58:25 BoogieIcfgContainer [2023-04-01 19:58:25,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:58:25,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:58:25,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:58:25,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:58:25,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:58:25" (1/3) ... [2023-04-01 19:58:25,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5981e026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:58:25, skipping insertion in model container [2023-04-01 19:58:25,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:58:25" (2/3) ... [2023-04-01 19:58:25,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5981e026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:58:25, skipping insertion in model container [2023-04-01 19:58:25,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:58:25" (3/3) ... [2023-04-01 19:58:25,994 INFO L112 eAbstractionObserver]: Analyzing ICFG res1.c [2023-04-01 19:58:26,006 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:58:26,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:58:26,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:58:26,051 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@714df802, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:58:26,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:58:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 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 19:58:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 19:58:26,060 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:58:26,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:58:26,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:58:26,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:58:26,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1106110167, now seen corresponding path program 1 times [2023-04-01 19:58:26,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:58:26,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249231809] [2023-04-01 19:58:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:58:26,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:58:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:26,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:58:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:26,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:58:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:26,326 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 19:58:26,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:58:26,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249231809] [2023-04-01 19:58:26,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249231809] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:58:26,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:58:26,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:58:26,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776995890] [2023-04-01 19:58:26,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:58:26,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:58:26,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:58:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:58:26,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:58:26,370 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:58:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:58:26,433 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2023-04-01 19:58:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:58:26,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-04-01 19:58:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:58:26,440 INFO L225 Difference]: With dead ends: 64 [2023-04-01 19:58:26,440 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 19:58:26,442 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 19:58:26,445 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:58:26,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:58:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 19:58:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 19:58:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:58:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 19:58:26,470 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-04-01 19:58:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:58:26,470 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 19:58:26,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:58:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 19:58:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 19:58:26,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:58:26,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:58:26,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:58:26,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:58:26,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:58:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash 85041813, now seen corresponding path program 1 times [2023-04-01 19:58:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:58:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943448444] [2023-04-01 19:58:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:58:26,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:58:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:26,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:58:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:26,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:58:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:26,644 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 19:58:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:58:26,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943448444] [2023-04-01 19:58:26,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943448444] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:58:26,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:58:26,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 19:58:26,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041481770] [2023-04-01 19:58:26,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:58:26,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 19:58:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:58:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 19:58:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 19:58:26,646 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 19:58:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:58:26,709 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-04-01 19:58:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 19:58:26,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 19:58:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:58:26,710 INFO L225 Difference]: With dead ends: 53 [2023-04-01 19:58:26,710 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 19:58:26,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:58:26,711 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:58:26,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:58:26,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 19:58:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2023-04-01 19:58:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:58:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-04-01 19:58:26,717 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2023-04-01 19:58:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:58:26,718 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-04-01 19:58:26,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 19:58:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-04-01 19:58:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 19:58:26,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:58:26,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:58:26,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 19:58:26,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:58:26,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:58:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1689002269, now seen corresponding path program 1 times [2023-04-01 19:58:26,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:58:26,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711631097] [2023-04-01 19:58:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:58:26,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:58:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:27,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:58:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:27,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:58:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:58:27,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:58:27,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711631097] [2023-04-01 19:58:27,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711631097] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:58:27,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102221312] [2023-04-01 19:58:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:58:27,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:58:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:58:27,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:58:27,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:58:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:27,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 19:58:27,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:58:28,102 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 19:58:28,103 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 23 treesize of output 19 [2023-04-01 19:58:28,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 19:58:28,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 19:58:28,358 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 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 19:58:28,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2023-04-01 19:58:28,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2023-04-01 19:58:28,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-04-01 19:58:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:58:28,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:58:29,446 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:58:29,447 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:58:29,448 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:58:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:58:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102221312] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:58:29,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:58:29,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 40 [2023-04-01 19:58:29,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514666380] [2023-04-01 19:58:29,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:58:29,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 19:58:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:58:29,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 19:58:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 19:58:29,637 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 40 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 19:58:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:58:30,490 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-04-01 19:58:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 19:58:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2023-04-01 19:58:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:58:30,491 INFO L225 Difference]: With dead ends: 48 [2023-04-01 19:58:30,491 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 19:58:30,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=484, Invalid=2596, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 19:58:30,493 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:58:30,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 105 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:58:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 19:58:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-04-01 19:58:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:58:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-04-01 19:58:30,516 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2023-04-01 19:58:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:58:30,517 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-04-01 19:58:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 19:58:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-04-01 19:58:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 19:58:30,517 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:58:30,518 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, 1, 1, 1] [2023-04-01 19:58:30,527 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 19:58:30,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:58:30,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:58:30,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:58:30,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1297741857, now seen corresponding path program 2 times [2023-04-01 19:58:30,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:58:30,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481533552] [2023-04-01 19:58:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:58:30,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:58:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:30,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:58:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:30,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:58:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:58:30,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:58:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481533552] [2023-04-01 19:58:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481533552] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:58:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069006879] [2023-04-01 19:58:30,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:58:30,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:58:30,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:58:30,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:58:30,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:58:30,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:58:30,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:58:30,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:58:30,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:58:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:58:30,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:58:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:58:30,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069006879] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:58:30,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:58:30,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-04-01 19:58:30,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880395571] [2023-04-01 19:58:30,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:58:30,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:58:30,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:58:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:58:30,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:58:30,970 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:58:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:58:31,126 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-04-01 19:58:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:58:31,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-04-01 19:58:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:58:31,131 INFO L225 Difference]: With dead ends: 87 [2023-04-01 19:58:31,131 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 19:58:31,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-04-01 19:58:31,132 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:58:31,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 46 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:58:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 19:58:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2023-04-01 19:58:31,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:58:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-04-01 19:58:31,139 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 35 [2023-04-01 19:58:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:58:31,139 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-04-01 19:58:31,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:58:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-04-01 19:58:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 19:58:31,140 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:58:31,140 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] [2023-04-01 19:58:31,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 19:58:31,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 19:58:31,345 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:58:31,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:58:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash -629044637, now seen corresponding path program 3 times [2023-04-01 19:58:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:58:31,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463927466] [2023-04-01 19:58:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:58:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:58:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:31,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:58:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:31,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:58:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 19:58:31,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:58:31,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463927466] [2023-04-01 19:58:31,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463927466] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:58:31,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307206631] [2023-04-01 19:58:31,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:58:31,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:58:31,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:58:31,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:58:31,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:58:31,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 19:58:31,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:58:31,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:58:31,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:58:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 19:58:31,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:58:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 19:58:31,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307206631] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:58:31,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:58:31,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-04-01 19:58:31,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581316645] [2023-04-01 19:58:31,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:58:31,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:58:31,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:58:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:58:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:58:31,601 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:58:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:58:31,737 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-04-01 19:58:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:58:31,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-04-01 19:58:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:58:31,738 INFO L225 Difference]: With dead ends: 51 [2023-04-01 19:58:31,738 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 19:58:31,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-04-01 19:58:31,739 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:58:31,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 70 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:58:31,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 19:58:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-04-01 19:58:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:58:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-04-01 19:58:31,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 39 [2023-04-01 19:58:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:58:31,745 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-04-01 19:58:31,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:58:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-04-01 19:58:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 19:58:31,746 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:58:31,746 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-04-01 19:58:31,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 19:58:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:58:31,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:58:31,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:58:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash 147208101, now seen corresponding path program 4 times [2023-04-01 19:58:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:58:31,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001631412] [2023-04-01 19:58:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:58:31,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:58:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:33,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:58:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:33,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:58:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:58:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:58:33,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:58:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001631412] [2023-04-01 19:58:33,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001631412] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:58:33,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84096220] [2023-04-01 19:58:33,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:58:33,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:58:33,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:58:33,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:58:33,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:58:33,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:58:33,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:58:33,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 68 conjunts are in the unsatisfiable core [2023-04-01 19:58:33,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:58:33,424 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 19:58:33,424 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 23 treesize of output 19 [2023-04-01 19:58:33,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 19:58:33,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:58:33,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2023-04-01 19:58:33,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2023-04-01 19:58:33,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2023-04-01 19:58:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:58:34,327 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:58:34,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2023-04-01 19:58:34,486 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:58:34,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:58:34,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2023-04-01 19:58:34,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 64 [2023-04-01 19:58:34,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 65 [2023-04-01 19:58:35,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 23 [2023-04-01 19:58:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:58:35,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:58:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:58:46,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84096220] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:58:46,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:58:46,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 66 [2023-04-01 19:58:46,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841704380] [2023-04-01 19:58:46,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:58:46,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-04-01 19:58:46,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:58:46,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-04-01 19:58:46,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=3741, Unknown=4, NotChecked=0, Total=4290 [2023-04-01 19:58:46,137 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 66 states, 64 states have (on average 1.328125) internal successors, (85), 63 states have internal predecessors, (85), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:58:54,214 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse15 (* c_main_~i~0 2)) (.cse34 (+ c_main_~i~0 1)) (.cse45 (* c_~N~0 2)) (.cse32 (select |c_#memory_int| c_main_~b~0.base)) (.cse46 (* c_main_~i~0 4))) (let ((.cse9 (+ .cse46 c_main_~a~0.offset)) (.cse12 (select .cse32 4)) (.cse31 (+ .cse45 1)) (.cse33 (+ .cse46 c_main_~b~0.offset)) (.cse37 (+ .cse46 4 c_main_~b~0.offset)) (.cse38 (<= c_~N~0 .cse34)) (.cse39 (< (+ c_main_~i~0 2) c_~N~0)) (.cse0 (< 0 c_main_~i~0)) (.cse6 (+ c_main_~a~0.offset 4)) (.cse5 (+ 5 .cse15)) (.cse4 (+ 4 c_main_~b~0.offset)) (.cse8 (select |c_#memory_int| c_main_~a~0.base)) (.cse10 (+ .cse46 c_main_~a~0.offset 4)) (.cse1 (< c_main_~i~0 0)) (.cse20 (select (select |c_#memory_int| |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|)) (.cse11 (select .cse32 0))) (and (or .cse0 .cse1 (forall ((v_ArrVal_235 Int) (v_ArrVal_233 Int) (v_ArrVal_231 Int) (v_ArrVal_230 Int) (v_ArrVal_228 Int) (v_ArrVal_238 Int) (v_ArrVal_226 Int)) (let ((.cse2 (let ((.cse7 (store |c_#memory_int| c_main_~a~0.base (store (store .cse8 .cse9 v_ArrVal_226) .cse10 v_ArrVal_228)))) (store .cse7 c_main_~b~0.base (store (store (select .cse7 c_main_~b~0.base) c_main_~b~0.offset v_ArrVal_230) .cse4 v_ArrVal_231))))) (let ((.cse3 (select .cse2 |c_main_~#sum~0.base|))) (or (< 1 v_ArrVal_230) (< 1 v_ArrVal_226) (< 1 v_ArrVal_231) (< (+ v_ArrVal_238 (select (select (store .cse2 |c_main_~#sum~0.base| (store .cse3 |c_main_~#sum~0.offset| v_ArrVal_238)) c_main_~b~0.base) .cse4)) .cse5) (< 1 v_ArrVal_228) (< (+ v_ArrVal_233 (select (select (store .cse2 |c_main_~#sum~0.base| (store .cse3 |c_main_~#sum~0.offset| v_ArrVal_233)) c_main_~a~0.base) .cse6)) v_ArrVal_235) (< (+ (select .cse3 |c_main_~#sum~0.offset|) (select (select .cse2 c_main_~a~0.base) c_main_~a~0.offset)) v_ArrVal_233) (< (+ v_ArrVal_235 (select (select (store .cse2 |c_main_~#sum~0.base| (store .cse3 |c_main_~#sum~0.offset| v_ArrVal_235)) c_main_~b~0.base) c_main_~b~0.offset)) v_ArrVal_238)))))) (<= c_~N~0 2) (<= .cse11 1) (= .cse12 1) (or (< c_main_~i~0 1) (< 1 c_main_~i~0) (forall ((v_ArrVal_235 Int) (v_ArrVal_233 Int) (v_ArrVal_231 Int) (v_ArrVal_230 Int) (v_ArrVal_228 Int) (v_ArrVal_238 Int)) (let ((.cse13 (let ((.cse16 (store |c_#memory_int| c_main_~a~0.base (store .cse8 .cse9 v_ArrVal_228)))) (store .cse16 c_main_~b~0.base (store (store (select .cse16 c_main_~b~0.base) c_main_~b~0.offset v_ArrVal_230) .cse4 v_ArrVal_231))))) (let ((.cse14 (select .cse13 |c_main_~#sum~0.base|))) (or (< (+ v_ArrVal_233 (select (select (store .cse13 |c_main_~#sum~0.base| (store .cse14 |c_main_~#sum~0.offset| v_ArrVal_233)) c_main_~a~0.base) .cse6)) v_ArrVal_235) (< 1 v_ArrVal_230) (< 1 v_ArrVal_231) (< (+ v_ArrVal_238 (select (select (store .cse13 |c_main_~#sum~0.base| (store .cse14 |c_main_~#sum~0.offset| v_ArrVal_238)) c_main_~b~0.base) .cse4)) (+ 3 .cse15)) (< 1 v_ArrVal_228) (< (+ (select (select .cse13 c_main_~a~0.base) c_main_~a~0.offset) (select .cse14 |c_main_~#sum~0.offset|)) v_ArrVal_233) (< (+ v_ArrVal_235 (select (select (store .cse13 |c_main_~#sum~0.base| (store .cse14 |c_main_~#sum~0.offset| v_ArrVal_235)) c_main_~b~0.base) c_main_~b~0.offset)) v_ArrVal_238)))))) (not (= c_main_~b~0.base |c_main_~#sum~0.base|)) (<= .cse12 1) (exists ((main_~b~0.base Int) (main_~a~0.base Int) (v_main_~i~0_51 Int)) (let ((.cse24 (select |c_#memory_int| main_~b~0.base)) (.cse22 (select |c_#memory_int| main_~a~0.base)) (.cse23 (* v_main_~i~0_51 4))) (let ((.cse19 (select .cse22 (+ (- 4) .cse23))) (.cse18 (select .cse24 4)) (.cse17 (select .cse24 0)) (.cse21 (select .cse22 .cse23))) (and (<= .cse17 1) (not (= main_~a~0.base main_~b~0.base)) (<= .cse18 1) (not (= main_~a~0.base |c_main_~#sum~0.base|)) (< v_main_~i~0_51 c_~N~0) (not (= |c_main_~#sum~0.base| main_~b~0.base)) (<= .cse19 1) (<= c_~N~0 (+ v_main_~i~0_51 1)) (<= .cse20 (+ .cse19 .cse18 .cse21 .cse17)) (<= .cse21 1))))) (exists ((main_~a~0.base Int) (v_main_~i~0_51 Int)) (let ((.cse27 (select |c_#memory_int| main_~a~0.base)) (.cse28 (* v_main_~i~0_51 4))) (let ((.cse25 (select .cse27 (+ (- 4) .cse28))) (.cse26 (select .cse27 .cse28))) (and (<= .cse20 (+ .cse25 .cse26)) (not (= main_~a~0.base |c_main_~#sum~0.base|)) (< v_main_~i~0_51 c_~N~0) (not (= c_main_~b~0.base main_~a~0.base)) (<= .cse25 1) (<= c_~N~0 (+ v_main_~i~0_51 1)) (<= .cse26 1))))) (< 1 c_~N~0) (or (forall ((v_ArrVal_235 Int) (v_ArrVal_233 Int) (v_ArrVal_231 Int) (v_ArrVal_238 Int)) (let ((.cse30 (store |c_#memory_int| c_main_~b~0.base (store .cse32 .cse33 v_ArrVal_231)))) (let ((.cse29 (select .cse30 |c_main_~#sum~0.base|))) (or (< 1 v_ArrVal_231) (< (+ (select .cse29 |c_main_~#sum~0.offset|) (select (select .cse30 c_main_~a~0.base) c_main_~a~0.offset)) v_ArrVal_233) (< (+ v_ArrVal_235 (select (select (store .cse30 |c_main_~#sum~0.base| (store .cse29 |c_main_~#sum~0.offset| v_ArrVal_235)) c_main_~b~0.base) c_main_~b~0.offset)) v_ArrVal_238) (< (+ v_ArrVal_233 (select (select (store .cse30 |c_main_~#sum~0.base| (store .cse29 |c_main_~#sum~0.offset| v_ArrVal_233)) c_main_~a~0.base) .cse6)) v_ArrVal_235) (< (+ v_ArrVal_238 (select (select (store .cse30 |c_main_~#sum~0.base| (store .cse29 |c_main_~#sum~0.offset| v_ArrVal_238)) c_main_~b~0.base) .cse4)) .cse31))))) (<= c_~N~0 c_main_~i~0) (< .cse34 c_~N~0)) (= c_main_~b~0.offset 0) (or (forall ((v_ArrVal_235 Int) (v_ArrVal_233 Int) (v_ArrVal_231 Int) (v_ArrVal_238 Int)) (let ((.cse35 (store |c_#memory_int| c_main_~b~0.base (store .cse32 .cse37 v_ArrVal_231)))) (let ((.cse36 (select .cse35 |c_main_~#sum~0.base|))) (or (< (+ v_ArrVal_238 (select (select (store .cse35 |c_main_~#sum~0.base| (store .cse36 |c_main_~#sum~0.offset| v_ArrVal_238)) c_main_~b~0.base) .cse4)) .cse31) (< 1 v_ArrVal_231) (< (+ (select (select .cse35 c_main_~a~0.base) c_main_~a~0.offset) (select .cse36 |c_main_~#sum~0.offset|)) v_ArrVal_233) (< (+ v_ArrVal_233 (select (select (store .cse35 |c_main_~#sum~0.base| (store .cse36 |c_main_~#sum~0.offset| v_ArrVal_233)) c_main_~a~0.base) .cse6)) v_ArrVal_235) (< (+ v_ArrVal_235 (select (select (store .cse35 |c_main_~#sum~0.base| (store .cse36 |c_main_~#sum~0.offset| v_ArrVal_235)) c_main_~b~0.base) c_main_~b~0.offset)) v_ArrVal_238))))) .cse38 .cse39) (or (forall ((v_ArrVal_235 Int) (v_ArrVal_233 Int) (v_ArrVal_231 Int) (v_ArrVal_230 Int) (v_ArrVal_238 Int)) (let ((.cse40 (store |c_#memory_int| c_main_~b~0.base (store (store .cse32 .cse33 v_ArrVal_230) .cse37 v_ArrVal_231)))) (let ((.cse41 (select .cse40 |c_main_~#sum~0.base|))) (or (< 1 v_ArrVal_230) (< 1 v_ArrVal_231) (< (+ v_ArrVal_233 (select (select (store .cse40 |c_main_~#sum~0.base| (store .cse41 |c_main_~#sum~0.offset| v_ArrVal_233)) c_main_~a~0.base) .cse6)) v_ArrVal_235) (< (+ v_ArrVal_235 (select (select (store .cse40 |c_main_~#sum~0.base| (store .cse41 |c_main_~#sum~0.offset| v_ArrVal_235)) c_main_~b~0.base) c_main_~b~0.offset)) v_ArrVal_238) (< (+ v_ArrVal_238 (select (select (store .cse40 |c_main_~#sum~0.base| (store .cse41 |c_main_~#sum~0.offset| v_ArrVal_238)) c_main_~b~0.base) .cse4)) .cse31) (< (+ (select .cse41 |c_main_~#sum~0.offset|) (select (select .cse40 c_main_~a~0.base) c_main_~a~0.offset)) v_ArrVal_233))))) .cse38 .cse39) (or .cse0 (forall ((v_ArrVal_235 Int) (v_ArrVal_233 Int) (v_ArrVal_231 Int) (v_ArrVal_230 Int) (v_ArrVal_228 Int) (v_ArrVal_238 Int)) (let ((.cse42 (let ((.cse44 (store |c_#memory_int| c_main_~a~0.base (store .cse8 .cse10 v_ArrVal_228)))) (store .cse44 c_main_~b~0.base (store (store (select .cse44 c_main_~b~0.base) c_main_~b~0.offset v_ArrVal_230) .cse4 v_ArrVal_231))))) (let ((.cse43 (select .cse42 |c_main_~#sum~0.base|))) (or (< 1 v_ArrVal_230) (< 1 v_ArrVal_231) (< 1 v_ArrVal_228) (< (+ v_ArrVal_233 (select (select (store .cse42 |c_main_~#sum~0.base| (store .cse43 |c_main_~#sum~0.offset| v_ArrVal_233)) c_main_~a~0.base) .cse6)) v_ArrVal_235) (< (+ v_ArrVal_238 (select (select (store .cse42 |c_main_~#sum~0.base| (store .cse43 |c_main_~#sum~0.offset| v_ArrVal_238)) c_main_~b~0.base) .cse4)) .cse5) (< (+ (select .cse43 |c_main_~#sum~0.offset|) (select (select .cse42 c_main_~a~0.base) c_main_~a~0.offset)) v_ArrVal_233) (< (+ v_ArrVal_235 (select (select (store .cse42 |c_main_~#sum~0.base| (store .cse43 |c_main_~#sum~0.offset| v_ArrVal_235)) c_main_~b~0.base) c_main_~b~0.offset)) v_ArrVal_238))))) .cse1) (<= (+ .cse20 2) .cse45) (= .cse11 1)))) is different from true [2023-04-01 20:00:08,876 WARN L223 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 257 DAG size of output: 255 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:00:10,919 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 20:00:43,442 WARN L223 SmtUtils]: Spent 25.88s on a formula simplification that was a NOOP. DAG size: 268 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:00:45,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 20:00:47,466 WARN L539 Checker$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 20:00:49,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 20:00:51,637 WARN L539 Checker$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 20:01:16,472 WARN L223 SmtUtils]: Spent 23.77s on a formula simplification that was a NOOP. DAG size: 270 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:01:22,848 WARN L223 SmtUtils]: Spent 5.90s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:01:31,792 WARN L223 SmtUtils]: Spent 8.64s on a formula simplification that was a NOOP. DAG size: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:01:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:01:31,868 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2023-04-01 20:01:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 20:01:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.328125) internal successors, (85), 63 states have internal predecessors, (85), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-04-01 20:01:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:01:31,870 INFO L225 Difference]: With dead ends: 75 [2023-04-01 20:01:31,870 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 20:01:31,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3687 ImplicationChecksByTransitivity, 165.3s TimeCoverageRelationStatistics Valid=1517, Invalid=9823, Unknown=6, NotChecked=210, Total=11556 [2023-04-01 20:01:31,874 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 130 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:01:31,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 177 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1015 Invalid, 5 Unknown, 127 Unchecked, 11.9s Time] [2023-04-01 20:01:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 20:01:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2023-04-01 20:01:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:01:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-04-01 20:01:31,894 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2023-04-01 20:01:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:01:31,895 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-04-01 20:01:31,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.328125) internal successors, (85), 63 states have internal predecessors, (85), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:01:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-04-01 20:01:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 20:01:31,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:01:31,905 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-04-01 20:01:31,911 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 20:01:32,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:01:32,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:01:32,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:01:32,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1198220185, now seen corresponding path program 5 times [2023-04-01 20:01:32,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:01:32,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504514716] [2023-04-01 20:01:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:01:32,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:01:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:32,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:01:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:32,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:01:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:01:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:01:32,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504514716] [2023-04-01 20:01:32,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504514716] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:01:32,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813914094] [2023-04-01 20:01:32,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 20:01:32,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:01:32,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:01:32,263 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 20:01:32,264 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 20:01:32,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-04-01 20:01:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:01:32,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:01:32,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:01:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:01:32,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:01:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:01:32,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813914094] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:01:32,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:01:32,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-04-01 20:01:32,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367669137] [2023-04-01 20:01:32,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:01:32,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:01:32,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:01:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:01:32,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:01:32,471 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:01:32,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:01:32,698 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2023-04-01 20:01:32,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:01:32,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-04-01 20:01:32,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:01:32,699 INFO L225 Difference]: With dead ends: 105 [2023-04-01 20:01:32,699 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 20:01:32,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-04-01 20:01:32,700 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:01:32,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 58 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:01:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 20:01:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2023-04-01 20:01:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:01:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2023-04-01 20:01:32,710 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 43 [2023-04-01 20:01:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:01:32,710 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2023-04-01 20:01:32,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:01:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2023-04-01 20:01:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 20:01:32,710 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:01:32,711 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:01:32,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 20:01:32,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:01:32,916 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:01:32,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:01:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash -86164757, now seen corresponding path program 6 times [2023-04-01 20:01:32,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:01:32,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812327067] [2023-04-01 20:01:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:01:32,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:01:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:33,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:01:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:33,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:01:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:01:33,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:01:33,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812327067] [2023-04-01 20:01:33,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812327067] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:01:33,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665881399] [2023-04-01 20:01:33,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 20:01:33,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:01:33,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:01:33,038 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 20:01:33,040 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 20:01:33,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-01 20:01:33,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:01:33,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:01:33,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:01:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:01:33,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:01:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:01:33,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665881399] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:01:33,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:01:33,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-04-01 20:01:33,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550675434] [2023-04-01 20:01:33,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:01:33,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:01:33,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:01:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:01:33,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:01:33,314 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:01:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:01:33,522 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2023-04-01 20:01:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 20:01:33,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2023-04-01 20:01:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:01:33,523 INFO L225 Difference]: With dead ends: 59 [2023-04-01 20:01:33,524 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 20:01:33,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-04-01 20:01:33,524 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:01:33,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 42 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:01:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 20:01:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-04-01 20:01:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:01:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-04-01 20:01:33,535 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 47 [2023-04-01 20:01:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:01:33,536 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-04-01 20:01:33,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:01:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-04-01 20:01:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 20:01:33,536 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:01:33,536 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1] [2023-04-01 20:01:33,542 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 20:01:33,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:01:33,742 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:01:33,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:01:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2131237331, now seen corresponding path program 7 times [2023-04-01 20:01:33,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:01:33,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490204810] [2023-04-01 20:01:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:01:33,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:01:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:36,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:01:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:36,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 20:01:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:01:36,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:01:36,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490204810] [2023-04-01 20:01:36,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490204810] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:01:36,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118549128] [2023-04-01 20:01:36,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 20:01:36,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:01:36,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:01:36,762 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 20:01:36,763 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 20:01:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:01:36,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 91 conjunts are in the unsatisfiable core [2023-04-01 20:01:36,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:01:37,022 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 20:01:37,022 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 23 treesize of output 19 [2023-04-01 20:01:37,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 20:01:37,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 20:01:37,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 20:01:37,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 20:01:37,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 20:01:37,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-04-01 20:01:38,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 68 [2023-04-01 20:01:38,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 76 [2023-04-01 20:01:38,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 76 [2023-04-01 20:01:38,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 78 [2023-04-01 20:01:39,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 79 [2023-04-01 20:01:39,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 80 [2023-04-01 20:01:39,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2023-04-01 20:01:40,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-04-01 20:01:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:01:40,310 INFO L327 TraceCheckSpWp]: Computing backward predicates...