/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-patterns/array9_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:27:48,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:27:48,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:27:48,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:27:48,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:27:48,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:27:48,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:27:48,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:27:48,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:27:48,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:27:48,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:27:48,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:27:48,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:27:48,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:27:48,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:27:48,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:27:48,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:27:48,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:27:48,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:27:48,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:27:48,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:27:48,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:27:48,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:27:48,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:27:48,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:27:48,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:27:48,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:27:48,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:27:48,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:27:48,916 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:27:48,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:27:48,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:27:48,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:27:48,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:27:48,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:27:48,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:27:48,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:27:48,919 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:27:48,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:27:48,920 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:27:48,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:27:48,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:27:48,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:27:48,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:27:48,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:27:48,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:27:48,921 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:27:48,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:27:48,922 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:27:48,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:27:48,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:27:48,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:27:48,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:27:48,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:27:48,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:27:48,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:27:48,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:27:48,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:27:48,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:27:48,923 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:27:48,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:27:48,924 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:27:48,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:27:48,924 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:27:48,924 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:27:49,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:27:49,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:27:49,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:27:49,184 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:27:49,184 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:27:49,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array9_pattern.c [2023-03-30 22:27:50,362 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:27:50,543 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:27:50,543 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array9_pattern.c [2023-03-30 22:27:50,548 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90b6d2741/9cbcc7bf64cd44a0b57d5a484d0a269f/FLAGd9a4c793d [2023-03-30 22:27:50,561 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90b6d2741/9cbcc7bf64cd44a0b57d5a484d0a269f [2023-03-30 22:27:50,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:27:50,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:27:50,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:27:50,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:27:50,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:27:50,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d55d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50, skipping insertion in model container [2023-03-30 22:27:50,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:27:50,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:27:50,727 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-patterns/array9_pattern.c[1352,1365] [2023-03-30 22:27:50,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:27:50,751 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:27:50,759 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-patterns/array9_pattern.c[1352,1365] [2023-03-30 22:27:50,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:27:50,778 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:27:50,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50 WrapperNode [2023-03-30 22:27:50,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:27:50,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:27:50,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:27:50,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:27:50,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,804 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:27:50,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:27:50,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:27:50,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:27:50,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (1/1) ... [2023-03-30 22:27:50,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:27:50,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:27:50,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:27:50,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:27:50,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:27:50,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:27:50,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:27:50,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:27:50,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:27:50,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:27:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:27:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:27:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:27:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:27:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:27:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:27:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:27:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-30 22:27:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:27:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:27:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:27:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:27:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:27:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:27:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:27:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:27:50,928 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:27:50,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:27:51,075 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:27:51,081 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:27:51,081 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:27:51,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:27:51 BoogieIcfgContainer [2023-03-30 22:27:51,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:27:51,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:27:51,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:27:51,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:27:51,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:27:50" (1/3) ... [2023-03-30 22:27:51,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6591aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:27:51, skipping insertion in model container [2023-03-30 22:27:51,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:27:50" (2/3) ... [2023-03-30 22:27:51,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6591aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:27:51, skipping insertion in model container [2023-03-30 22:27:51,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:27:51" (3/3) ... [2023-03-30 22:27:51,090 INFO L112 eAbstractionObserver]: Analyzing ICFG array9_pattern.c [2023-03-30 22:27:51,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:27:51,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:27:51,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:27:51,160 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;@5282d69e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:27:51,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:27:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:27:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-30 22:27:51,170 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:27:51,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:27:51,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:27:51,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:27:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1560618054, now seen corresponding path program 1 times [2023-03-30 22:27:51,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:27:51,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975083003] [2023-03-30 22:27:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:27:51,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:27:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:27:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:27:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:27:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:27:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:27:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:27:51,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:27:51,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975083003] [2023-03-30 22:27:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975083003] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:27:51,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:27:51,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:27:51,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454293471] [2023-03-30 22:27:51,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:27:51,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:27:51,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:27:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:27:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:27:51,471 INFO L87 Difference]: Start difference. First operand has 36 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:27:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:27:51,598 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2023-03-30 22:27:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:27:51,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 21 [2023-03-30 22:27:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:27:51,609 INFO L225 Difference]: With dead ends: 65 [2023-03-30 22:27:51,610 INFO L226 Difference]: Without dead ends: 29 [2023-03-30 22:27:51,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:27:51,617 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:27:51,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:27:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-30 22:27:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-30 22:27:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:27:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-03-30 22:27:51,659 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2023-03-30 22:27:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:27:51,660 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-03-30 22:27:51,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:27:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-03-30 22:27:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-30 22:27:51,663 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:27:51,663 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:27:51,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:27:51,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:27:51,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:27:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1122800577, now seen corresponding path program 1 times [2023-03-30 22:27:51,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:27:51,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112574575] [2023-03-30 22:27:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:27:51,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:27:51,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:27:51,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172527344] [2023-03-30 22:27:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:27:51,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:27:51,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:27:51,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:27:51,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:27:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:27:51,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:27:51,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:27:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:27:51,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:27:51,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:27:51,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112574575] [2023-03-30 22:27:51,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:27:51,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172527344] [2023-03-30 22:27:51,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172527344] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:27:51,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:27:51,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:27:51,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970073377] [2023-03-30 22:27:51,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:27:51,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:27:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:27:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:27:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:27:51,916 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:27:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:27:52,024 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2023-03-30 22:27:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 22:27:52,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-03-30 22:27:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:27:52,033 INFO L225 Difference]: With dead ends: 56 [2023-03-30 22:27:52,033 INFO L226 Difference]: Without dead ends: 37 [2023-03-30 22:27:52,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:27:52,035 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:27:52,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 80 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:27:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-30 22:27:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-03-30 22:27:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:27:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-03-30 22:27:52,044 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2023-03-30 22:27:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:27:52,045 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-03-30 22:27:52,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:27:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-03-30 22:27:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-30 22:27:52,047 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:27:52,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:27:52,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:27:52,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:27:52,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:27:52,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:27:52,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1070982623, now seen corresponding path program 1 times [2023-03-30 22:27:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:27:52,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774667498] [2023-03-30 22:27:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:27:52,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:27:52,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:27:52,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632125970] [2023-03-30 22:27:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:27:52,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:27:52,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:27:52,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:27:52,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:27:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:27:52,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-30 22:27:52,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:27:52,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-30 22:27:52,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:27:52,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-03-30 22:27:52,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:27:52,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-03-30 22:27:53,094 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:27:53,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 28 [2023-03-30 22:27:53,287 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:27:53,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2023-03-30 22:27:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:27:53,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:27:53,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:27:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774667498] [2023-03-30 22:27:53,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:27:53,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632125970] [2023-03-30 22:27:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632125970] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:27:53,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:27:53,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-03-30 22:27:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617418211] [2023-03-30 22:27:53,788 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-30 22:27:53,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-30 22:27:53,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:27:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-30 22:27:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-03-30 22:27:53,791 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:27:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:27:54,358 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2023-03-30 22:27:54,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-30 22:27:54,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-03-30 22:27:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:27:54,360 INFO L225 Difference]: With dead ends: 85 [2023-03-30 22:27:54,360 INFO L226 Difference]: Without dead ends: 63 [2023-03-30 22:27:54,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2023-03-30 22:27:54,362 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:27:54,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 189 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:27:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-03-30 22:27:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2023-03-30 22:27:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:27:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-03-30 22:27:54,373 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 34 [2023-03-30 22:27:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:27:54,373 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-03-30 22:27:54,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:27:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-03-30 22:27:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-30 22:27:54,374 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:27:54,374 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:27:54,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:27:54,580 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,SelfDestructingSolverStorable2 [2023-03-30 22:27:54,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:27:54,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:27:54,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1729517825, now seen corresponding path program 2 times [2023-03-30 22:27:54,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:27:54,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191917912] [2023-03-30 22:27:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:27:54,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:27:54,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:27:54,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59253204] [2023-03-30 22:27:54,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:27:54,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:27:54,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:27:54,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:27:54,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:27:54,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:27:54,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:27:54,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:27:54,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:27:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:27:54,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:27:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:27:54,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:27:54,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191917912] [2023-03-30 22:27:54,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:27:54,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59253204] [2023-03-30 22:27:54,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59253204] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:27:54,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:27:54,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-03-30 22:27:54,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641420374] [2023-03-30 22:27:54,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:27:54,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-30 22:27:54,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:27:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-30 22:27:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:27:54,775 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:27:54,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:27:54,866 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2023-03-30 22:27:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 22:27:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-03-30 22:27:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:27:54,874 INFO L225 Difference]: With dead ends: 68 [2023-03-30 22:27:54,874 INFO L226 Difference]: Without dead ends: 46 [2023-03-30 22:27:54,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:27:54,875 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:27:54,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 124 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:27:54,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-30 22:27:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2023-03-30 22:27:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:27:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-03-30 22:27:54,887 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 36 [2023-03-30 22:27:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:27:54,887 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-03-30 22:27:54,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:27:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-03-30 22:27:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-30 22:27:54,888 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:27:54,888 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:27:54,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:27:55,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:27:55,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:27:55,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:27:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash 359506723, now seen corresponding path program 3 times [2023-03-30 22:27:55,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:27:55,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143576718] [2023-03-30 22:27:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:27:55,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:27:55,130 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:27:55,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482691385] [2023-03-30 22:27:55,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:27:55,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:27:55,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:27:55,132 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:27:55,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:27:55,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-30 22:27:55,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:27:55,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:27:55,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:27:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:27:55,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:27:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:27:55,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:27:55,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143576718] [2023-03-30 22:27:55,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:27:55,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482691385] [2023-03-30 22:27:55,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482691385] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:27:55,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:27:55,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-03-30 22:27:55,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711453411] [2023-03-30 22:27:55,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:27:55,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-30 22:27:55,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:27:55,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-30 22:27:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:27:55,337 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:27:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:27:55,426 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2023-03-30 22:27:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:27:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-03-30 22:27:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:27:55,427 INFO L225 Difference]: With dead ends: 45 [2023-03-30 22:27:55,428 INFO L226 Difference]: Without dead ends: 40 [2023-03-30 22:27:55,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:27:55,429 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:27:55,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 94 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:27:55,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-30 22:27:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2023-03-30 22:27:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:27:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-03-30 22:27:55,434 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2023-03-30 22:27:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:27:55,435 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-03-30 22:27:55,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:27:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-03-30 22:27:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 22:27:55,435 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:27:55,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:27:55,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:27:55,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:27:55,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:27:55,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:27:55,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1418791039, now seen corresponding path program 4 times [2023-03-30 22:27:55,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:27:55,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493658007] [2023-03-30 22:27:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:27:55,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:27:55,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:27:55,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151659586] [2023-03-30 22:27:55,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:27:55,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:27:55,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:27:55,660 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:27:55,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:27:55,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:27:55,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:27:55,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 60 conjunts are in the unsatisfiable core [2023-03-30 22:27:55,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:27:55,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-30 22:27:55,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:27:55,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-03-30 22:27:55,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-03-30 22:27:55,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-03-30 22:27:56,452 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-03-30 22:27:56,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 52 [2023-03-30 22:27:56,804 INFO L321 Elim1Store]: treesize reduction 68, result has 45.6 percent of original size [2023-03-30 22:27:56,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 140 [2023-03-30 22:27:57,649 INFO L321 Elim1Store]: treesize reduction 36, result has 44.6 percent of original size [2023-03-30 22:27:57,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 2 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 134 treesize of output 98 [2023-03-30 22:27:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:27:57,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:27:58,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:27:58,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493658007] [2023-03-30 22:27:58,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:27:58,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151659586] [2023-03-30 22:27:58,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151659586] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:27:58,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:27:58,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-03-30 22:27:58,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166141406] [2023-03-30 22:27:58,832 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-30 22:27:58,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-30 22:27:58,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:27:58,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-30 22:27:58,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2023-03-30 22:27:58,834 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:00,041 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2023-03-30 22:28:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-03-30 22:28:00,041 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-03-30 22:28:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:00,042 INFO L225 Difference]: With dead ends: 83 [2023-03-30 22:28:00,042 INFO L226 Difference]: Without dead ends: 78 [2023-03-30 22:28:00,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2023-03-30 22:28:00,044 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:00,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 413 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:28:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-03-30 22:28:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2023-03-30 22:28:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:28:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-03-30 22:28:00,057 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 38 [2023-03-30 22:28:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:00,058 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-03-30 22:28:00,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-03-30 22:28:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 22:28:00,065 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:00,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:28:00,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:00,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:00,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:00,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:00,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2005597053, now seen corresponding path program 1 times [2023-03-30 22:28:00,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:00,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673022899] [2023-03-30 22:28:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:00,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:00,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:28:00,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724279739] [2023-03-30 22:28:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:00,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:00,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:00,291 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) [2023-03-30 22:28:00,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:28:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:00,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 68 conjunts are in the unsatisfiable core [2023-03-30 22:28:00,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:00,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-30 22:28:00,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:00,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-03-30 22:28:00,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-03-30 22:28:00,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:28:00,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:28:00,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-03-30 22:28:00,976 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-03-30 22:28:00,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 58 [2023-03-30 22:28:01,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:01,178 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-03-30 22:28:01,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 70 [2023-03-30 22:28:01,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:28:01,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 112 [2023-03-30 22:28:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:28:01,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:03,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:03,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673022899] [2023-03-30 22:28:03,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:28:03,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724279739] [2023-03-30 22:28:03,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724279739] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:28:03,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:28:03,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-03-30 22:28:03,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865348656] [2023-03-30 22:28:03,256 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:03,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 22:28:03,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 22:28:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2023-03-30 22:28:03,261 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:04,226 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2023-03-30 22:28:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 22:28:04,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-03-30 22:28:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:04,227 INFO L225 Difference]: With dead ends: 81 [2023-03-30 22:28:04,227 INFO L226 Difference]: Without dead ends: 76 [2023-03-30 22:28:04,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2023-03-30 22:28:04,229 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:04,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 278 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 22:28:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-03-30 22:28:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2023-03-30 22:28:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:28:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-03-30 22:28:04,243 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 38 [2023-03-30 22:28:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:04,243 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-03-30 22:28:04,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-03-30 22:28:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-30 22:28:04,244 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:04,244 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:28:04,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:04,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:04,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:04,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash -965956513, now seen corresponding path program 5 times [2023-03-30 22:28:04,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:04,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360784554] [2023-03-30 22:28:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:04,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:04,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:28:04,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496737509] [2023-03-30 22:28:04,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:28:04,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:04,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:04,474 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) [2023-03-30 22:28:04,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:28:04,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-03-30 22:28:04,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:28:04,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:28:04,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:28:04,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:28:04,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:04,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360784554] [2023-03-30 22:28:04,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:28:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496737509] [2023-03-30 22:28:04,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496737509] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:28:04,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:28:04,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-03-30 22:28:04,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746451347] [2023-03-30 22:28:04,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:04,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:28:04,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:28:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:28:04,708 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:28:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:04,843 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2023-03-30 22:28:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:28:04,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-03-30 22:28:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:04,844 INFO L225 Difference]: With dead ends: 107 [2023-03-30 22:28:04,844 INFO L226 Difference]: Without dead ends: 94 [2023-03-30 22:28:04,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-03-30 22:28:04,846 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:04,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 132 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:28:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-03-30 22:28:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2023-03-30 22:28:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 66 states have internal predecessors, (76), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:28:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-03-30 22:28:04,865 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 40 [2023-03-30 22:28:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:04,865 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-03-30 22:28:04,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:28:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-03-30 22:28:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-30 22:28:04,866 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:04,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:28:04,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:05,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:05,072 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:05,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:05,072 INFO L85 PathProgramCache]: Analyzing trace with hash 836906883, now seen corresponding path program 6 times [2023-03-30 22:28:05,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:05,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789288672] [2023-03-30 22:28:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:05,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:05,088 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:28:05,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636588746] [2023-03-30 22:28:05,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:28:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:05,089 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:28:05,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:28:05,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-03-30 22:28:05,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:28:05,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:28:05,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:28:05,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:28:05,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789288672] [2023-03-30 22:28:05,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:28:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636588746] [2023-03-30 22:28:05,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636588746] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:28:05,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:28:05,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-03-30 22:28:05,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395232173] [2023-03-30 22:28:05,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:05,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:28:05,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:28:05,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:28:05,327 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:28:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:05,487 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-03-30 22:28:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:28:05,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-03-30 22:28:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:05,490 INFO L225 Difference]: With dead ends: 97 [2023-03-30 22:28:05,490 INFO L226 Difference]: Without dead ends: 92 [2023-03-30 22:28:05,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-03-30 22:28:05,493 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:05,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 214 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:28:05,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-03-30 22:28:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2023-03-30 22:28:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:28:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2023-03-30 22:28:05,514 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 40 [2023-03-30 22:28:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:05,515 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2023-03-30 22:28:05,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:28:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2023-03-30 22:28:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-30 22:28:05,515 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:05,516 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:28:05,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:05,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-03-30 22:28:05,722 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:05,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2096229345, now seen corresponding path program 7 times [2023-03-30 22:28:05,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:05,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505318919] [2023-03-30 22:28:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:05,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:05,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:28:05,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891413396] [2023-03-30 22:28:05,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-30 22:28:05,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:05,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:05,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:28:05,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:28:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:05,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 72 conjunts are in the unsatisfiable core [2023-03-30 22:28:05,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:05,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-30 22:28:05,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:05,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-03-30 22:28:05,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-03-30 22:28:05,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:28:05,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:28:05,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-03-30 22:28:06,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-03-30 22:28:06,486 INFO L321 Elim1Store]: treesize reduction 36, result has 48.6 percent of original size [2023-03-30 22:28:06,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 82 [2023-03-30 22:28:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:06,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:06,687 INFO L321 Elim1Store]: treesize reduction 20, result has 50.0 percent of original size [2023-03-30 22:28:06,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 101 [2023-03-30 22:28:07,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 26 [2023-03-30 22:28:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:28:07,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:14,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:14,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505318919] [2023-03-30 22:28:14,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:28:14,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891413396] [2023-03-30 22:28:14,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891413396] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:28:14,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:28:14,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-03-30 22:28:14,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079788136] [2023-03-30 22:28:14,535 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:14,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-30 22:28:14,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:14,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-30 22:28:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1100, Unknown=3, NotChecked=0, Total=1260 [2023-03-30 22:28:14,536 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:15,536 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2023-03-30 22:28:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-03-30 22:28:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-03-30 22:28:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:15,537 INFO L225 Difference]: With dead ends: 98 [2023-03-30 22:28:15,537 INFO L226 Difference]: Without dead ends: 93 [2023-03-30 22:28:15,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=257, Invalid=1902, Unknown=3, NotChecked=0, Total=2162 [2023-03-30 22:28:15,538 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:15,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 248 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:28:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-03-30 22:28:15,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2023-03-30 22:28:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 68 states have internal predecessors, (78), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:28:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-03-30 22:28:15,559 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 42 [2023-03-30 22:28:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:15,559 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-03-30 22:28:15,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-03-30 22:28:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-30 22:28:15,561 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:15,561 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:28:15,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:15,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-30 22:28:15,769 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:15,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash 816365667, now seen corresponding path program 2 times [2023-03-30 22:28:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:15,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145410475] [2023-03-30 22:28:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:15,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:28:15,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035450688] [2023-03-30 22:28:15,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:28:15,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:15,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:15,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:28:15,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 22:28:15,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:28:15,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:28:15,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 78 conjunts are in the unsatisfiable core [2023-03-30 22:28:15,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:15,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-30 22:28:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:15,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-03-30 22:28:15,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-03-30 22:28:15,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:28:15,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:28:16,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-03-30 22:28:16,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-03-30 22:28:16,723 INFO L321 Elim1Store]: treesize reduction 36, result has 48.6 percent of original size [2023-03-30 22:28:16,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 82 [2023-03-30 22:28:16,978 INFO L321 Elim1Store]: treesize reduction 60, result has 36.2 percent of original size [2023-03-30 22:28:16,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 106 [2023-03-30 22:28:18,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:28:18,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 135 [2023-03-30 22:28:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:28:19,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:22,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145410475] [2023-03-30 22:28:22,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:28:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035450688] [2023-03-30 22:28:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035450688] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:28:22,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:28:22,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-03-30 22:28:22,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511235648] [2023-03-30 22:28:22,696 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-03-30 22:28:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-03-30 22:28:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1642, Unknown=0, NotChecked=0, Total=1892 [2023-03-30 22:28:22,698 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 25 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:25,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:25,584 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2023-03-30 22:28:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-03-30 22:28:25,584 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 25 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-03-30 22:28:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:25,586 INFO L225 Difference]: With dead ends: 134 [2023-03-30 22:28:25,586 INFO L226 Difference]: Without dead ends: 129 [2023-03-30 22:28:25,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=607, Invalid=3815, Unknown=0, NotChecked=0, Total=4422 [2023-03-30 22:28:25,587 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:25,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 469 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:28:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-03-30 22:28:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 83. [2023-03-30 22:28:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 68 states have internal predecessors, (78), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:28:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-03-30 22:28:25,610 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 42 [2023-03-30 22:28:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:25,610 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-03-30 22:28:25,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 25 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-03-30 22:28:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-30 22:28:25,611 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:25,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:28:25,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:25,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-30 22:28:25,817 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:25,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:25,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1124337855, now seen corresponding path program 8 times [2023-03-30 22:28:25,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:25,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889302951] [2023-03-30 22:28:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:25,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:25,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:28:25,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143083878] [2023-03-30 22:28:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:28:25,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:25,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:25,851 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:28:25,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 22:28:25,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:28:25,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:28:25,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-30 22:28:25,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:28:26,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:28:26,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:26,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889302951] [2023-03-30 22:28:26,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-30 22:28:26,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143083878] [2023-03-30 22:28:26,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143083878] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:28:26,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:28:26,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-03-30 22:28:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392166664] [2023-03-30 22:28:26,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:26,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 22:28:26,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 22:28:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:28:26,106 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:28:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:26,340 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2023-03-30 22:28:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 22:28:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2023-03-30 22:28:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:26,341 INFO L225 Difference]: With dead ends: 145 [2023-03-30 22:28:26,341 INFO L226 Difference]: Without dead ends: 130 [2023-03-30 22:28:26,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-03-30 22:28:26,342 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 96 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:26,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 201 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:28:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-03-30 22:28:26,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2023-03-30 22:28:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 90 states have internal predecessors, (104), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:28:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2023-03-30 22:28:26,368 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 44 [2023-03-30 22:28:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:26,369 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2023-03-30 22:28:26,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 22:28:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2023-03-30 22:28:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-30 22:28:26,369 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:26,369 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:28:26,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:26,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 22:28:26,571 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:26,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:26,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1376143551, now seen corresponding path program 9 times [2023-03-30 22:28:26,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:26,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468932527] [2023-03-30 22:28:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:26,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:26,588 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-30 22:28:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729892924] [2023-03-30 22:28:26,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:28:26,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:26,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:26,590 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:28:26,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-30 22:28:26,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-30 22:28:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:28:26,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 83 conjunts are in the unsatisfiable core [2023-03-30 22:28:26,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:26,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-30 22:28:26,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:26,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-03-30 22:28:26,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-03-30 22:28:26,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:28:26,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-30 22:28:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:26,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2023-03-30 22:28:26,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-03-30 22:28:26,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-03-30 22:28:26,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-03-30 22:28:26,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:26,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2023-03-30 22:28:26,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-03-30 22:28:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:26,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 30 [2023-03-30 22:28:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:26,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:26,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 30 [2023-03-30 22:28:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 65 [2023-03-30 22:28:27,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 44 [2023-03-30 22:28:27,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 90 [2023-03-30 22:28:27,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:28,004 INFO L321 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2023-03-30 22:28:28,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 120 [2023-03-30 22:28:28,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:28:28,666 INFO L321 Elim1Store]: treesize reduction 226, result has 23.1 percent of original size [2023-03-30 22:28:28,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 9 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 29 case distinctions, treesize of input 202 treesize of output 259 [2023-03-30 22:28:31,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:28:31,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 7 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 78 case distinctions, treesize of input 248 treesize of output 532