/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/nla-digbench-scaling/hard-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:16:42,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:16:42,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:16:42,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 02:16:42,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:16:42,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:16:42,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:16:42,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:16:42,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:16:42,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:16:42,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:16:42,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:16:42,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:16:42,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:16:42,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:16:42,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:16:42,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 02:16:42,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 02:16:42,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 02:16:42,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 02:16:42,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 02:16:42,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 02:16:42,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 02:16:42,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 02:16:42,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 02:16:42,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:16:42,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:16:42,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:16:42,582 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 02:16:42,614 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:16:42,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:16:42,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:16:42,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:16:42,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:16:42,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:16:42,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:16:42,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:16:42,617 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:16:42,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:16:42,618 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:16:42,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:16:42,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:16:42,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:16:42,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:16:42,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:16:42,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:16:42,619 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:16:42,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:16:42,619 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:16:42,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:16:42,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:16:42,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:16:42,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:16:42,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:16:42,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:16:42,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:16:42,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:16:42,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:16:42,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:16:42,621 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:16:42,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:16:42,621 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:16:42,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:16:42,621 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:16:42,622 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:16:42,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:16:42,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:16:42,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:16:42,861 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:16:42,861 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:16:42,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2023-04-02 02:16:44,065 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:16:44,194 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:16:44,195 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2023-04-02 02:16:44,200 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04fe94476/a43b4e35120340558d48ec564819b03c/FLAG914d7d76e [2023-04-02 02:16:44,213 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04fe94476/a43b4e35120340558d48ec564819b03c [2023-04-02 02:16:44,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:16:44,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:16:44,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:16:44,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:16:44,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:16:44,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d26dc25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44, skipping insertion in model container [2023-04-02 02:16:44,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:16:44,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:16:44,357 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/nla-digbench-scaling/hard-ll_unwindbound10.c[538,551] [2023-04-02 02:16:44,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:16:44,380 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:16:44,390 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/nla-digbench-scaling/hard-ll_unwindbound10.c[538,551] [2023-04-02 02:16:44,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:16:44,413 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:16:44,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44 WrapperNode [2023-04-02 02:16:44,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:16:44,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:16:44,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:16:44,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:16:44,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:16:44,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:16:44,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:16:44,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:16:44,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (1/1) ... [2023-04-02 02:16:44,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:16:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:44,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 02:16:44,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 02:16:44,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:16:44,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:16:44,520 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:16:44,520 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:16:44,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:16:44,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:16:44,520 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:16:44,520 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:16:44,520 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:16:44,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:16:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 02:16:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:16:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:16:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:16:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:16:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:16:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:16:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:16:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:16:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:16:44,565 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:16:44,566 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:16:44,795 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:16:44,800 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:16:44,800 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 02:16:44,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:16:44 BoogieIcfgContainer [2023-04-02 02:16:44,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:16:44,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:16:44,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:16:44,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:16:44,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:16:44" (1/3) ... [2023-04-02 02:16:44,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382e8883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:16:44, skipping insertion in model container [2023-04-02 02:16:44,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:44" (2/3) ... [2023-04-02 02:16:44,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382e8883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:16:44, skipping insertion in model container [2023-04-02 02:16:44,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:16:44" (3/3) ... [2023-04-02 02:16:44,823 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.c [2023-04-02 02:16:44,835 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:16:44,835 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:16:44,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:16:44,889 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;@60bd7e7c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:16:44,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:16:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:16:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 02:16:44,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:44,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:44,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:44,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2023-04-02 02:16:44,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:44,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993048710] [2023-04-02 02:16:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:45,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993048710] [2023-04-02 02:16:45,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 02:16:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159972550] [2023-04-02 02:16:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:45,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:45,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:45,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 02:16:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:45,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 02:16:45,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:16:45,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:16:45,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159972550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:45,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:45,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 02:16:45,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560285362] [2023-04-02 02:16:45,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:45,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 02:16:45,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 02:16:45,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:16:45,182 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:16:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:45,219 INFO L93 Difference]: Finished difference Result 65 states and 99 transitions. [2023-04-02 02:16:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 02:16:45,222 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-02 02:16:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:45,228 INFO L225 Difference]: With dead ends: 65 [2023-04-02 02:16:45,228 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 02:16:45,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:16:45,235 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:45,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 02:16:45,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 02:16:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:16:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-04-02 02:16:45,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2023-04-02 02:16:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:45,274 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-04-02 02:16:45,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:16:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-04-02 02:16:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 02:16:45,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:45,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:45,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:45,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 02:16:45,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:45,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2023-04-02 02:16:45,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:45,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041989962] [2023-04-02 02:16:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:45,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:45,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:16:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:45,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 02:16:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:16:45,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:45,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041989962] [2023-04-02 02:16:45,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041989962] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:45,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:45,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:16:45,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698939678] [2023-04-02 02:16:45,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:45,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:16:45,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:45,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:16:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:16:45,845 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:16:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:46,014 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2023-04-02 02:16:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:16:46,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-02 02:16:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:46,019 INFO L225 Difference]: With dead ends: 47 [2023-04-02 02:16:46,019 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 02:16:46,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:16:46,020 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:46,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 78 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 02:16:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2023-04-02 02:16:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:16:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2023-04-02 02:16:46,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2023-04-02 02:16:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:46,036 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2023-04-02 02:16:46,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:16:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2023-04-02 02:16:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 02:16:46,037 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:46,037 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] [2023-04-02 02:16:46,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 02:16:46,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:46,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:46,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2023-04-02 02:16:46,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:46,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469542442] [2023-04-02 02:16:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:46,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:46,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:46,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512394797] [2023-04-02 02:16:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:46,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:46,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:46,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:46,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 02:16:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:46,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:16:46,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:16:46,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:16:46,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:46,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469542442] [2023-04-02 02:16:46,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:46,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512394797] [2023-04-02 02:16:46,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512394797] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:46,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:46,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 02:16:46,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102616071] [2023-04-02 02:16:46,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:46,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 02:16:46,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:46,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 02:16:46,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:16:46,130 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:16:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:46,149 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-04-02 02:16:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 02:16:46,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-04-02 02:16:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:46,151 INFO L225 Difference]: With dead ends: 52 [2023-04-02 02:16:46,152 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 02:16:46,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:16:46,154 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:46,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 02:16:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-02 02:16:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:16:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-04-02 02:16:46,165 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2023-04-02 02:16:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:46,166 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-04-02 02:16:46,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:16:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-04-02 02:16:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 02:16:46,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:46,166 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:46,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:46,371 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 [2023-04-02 02:16:46,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:46,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2023-04-02 02:16:46,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:46,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050621006] [2023-04-02 02:16:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:46,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:46,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:16:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:46,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 02:16:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:46,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-02 02:16:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:16:46,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:46,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050621006] [2023-04-02 02:16:46,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050621006] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:46,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:46,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:16:46,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526868135] [2023-04-02 02:16:46,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:46,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:16:46,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:16:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:16:46,458 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:16:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:46,638 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2023-04-02 02:16:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:16:46,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-04-02 02:16:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:46,640 INFO L225 Difference]: With dead ends: 52 [2023-04-02 02:16:46,640 INFO L226 Difference]: Without dead ends: 50 [2023-04-02 02:16:46,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:16:46,643 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:46,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-02 02:16:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2023-04-02 02:16:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:16:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-04-02 02:16:46,666 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2023-04-02 02:16:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:46,666 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-04-02 02:16:46,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:16:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-04-02 02:16:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 02:16:46,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:46,669 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:46,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 02:16:46,673 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:46,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:46,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2023-04-02 02:16:46,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:46,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905021066] [2023-04-02 02:16:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:46,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:46,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:46,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650083060] [2023-04-02 02:16:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:46,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:46,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:46,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:46,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 02:16:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:46,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 02:16:46,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:16:46,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:16:47,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:47,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905021066] [2023-04-02 02:16:47,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:47,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650083060] [2023-04-02 02:16:47,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650083060] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:47,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:47,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-04-02 02:16:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29237168] [2023-04-02 02:16:47,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:47,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:16:47,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:16:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:16:47,066 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 02:16:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:47,216 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2023-04-02 02:16:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 02:16:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2023-04-02 02:16:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:47,219 INFO L225 Difference]: With dead ends: 83 [2023-04-02 02:16:47,219 INFO L226 Difference]: Without dead ends: 67 [2023-04-02 02:16:47,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:16:47,220 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:47,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 115 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-02 02:16:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2023-04-02 02:16:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.236842105263158) internal successors, (47), 41 states have internal predecessors, (47), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 02:16:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2023-04-02 02:16:47,234 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 28 [2023-04-02 02:16:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:47,235 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2023-04-02 02:16:47,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 02:16:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2023-04-02 02:16:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 02:16:47,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:47,236 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:47,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:47,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:47,443 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:47,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2023-04-02 02:16:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:47,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145748413] [2023-04-02 02:16:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:47,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:47,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:47,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257297435] [2023-04-02 02:16:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:47,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:47,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:47,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:47,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 02:16:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:47,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:16:47,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 02:16:47,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:16:47,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:47,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145748413] [2023-04-02 02:16:47,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:47,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257297435] [2023-04-02 02:16:47,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257297435] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:47,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:47,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 02:16:47,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658466966] [2023-04-02 02:16:47,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:47,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:16:47,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:47,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:16:47,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:16:47,538 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 02:16:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:47,559 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2023-04-02 02:16:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 02:16:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2023-04-02 02:16:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:47,561 INFO L225 Difference]: With dead ends: 80 [2023-04-02 02:16:47,561 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 02:16:47,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:16:47,561 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:47,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 02:16:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2023-04-02 02:16:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 47 states have internal predecessors, (52), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 02:16:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2023-04-02 02:16:47,584 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 36 [2023-04-02 02:16:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:47,584 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2023-04-02 02:16:47,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 02:16:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2023-04-02 02:16:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 02:16:47,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:47,585 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:47,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 02:16:47,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:47,790 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:47,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2023-04-02 02:16:47,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:47,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542231816] [2023-04-02 02:16:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:47,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:47,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:47,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797331739] [2023-04-02 02:16:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:47,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:47,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:47,800 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:47,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 02:16:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:47,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:16:47,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 02:16:48,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 02:16:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542231816] [2023-04-02 02:16:48,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797331739] [2023-04-02 02:16:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797331739] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:48,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:48,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-02 02:16:48,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044225140] [2023-04-02 02:16:48,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:48,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 02:16:48,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 02:16:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:16:48,234 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 02:16:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:48,371 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2023-04-02 02:16:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:16:48,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 36 [2023-04-02 02:16:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:48,372 INFO L225 Difference]: With dead ends: 84 [2023-04-02 02:16:48,372 INFO L226 Difference]: Without dead ends: 76 [2023-04-02 02:16:48,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-04-02 02:16:48,373 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:48,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 129 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-02 02:16:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-04-02 02:16:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.173913043478261) internal successors, (54), 50 states have internal predecessors, (54), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 02:16:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2023-04-02 02:16:48,399 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 36 [2023-04-02 02:16:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:48,399 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2023-04-02 02:16:48,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 02:16:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2023-04-02 02:16:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 02:16:48,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:48,409 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:48,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 02:16:48,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:48,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:48,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:48,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2023-04-02 02:16:48,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:48,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752539812] [2023-04-02 02:16:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:48,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:48,621 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:48,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554417336] [2023-04-02 02:16:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:48,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:48,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:48,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 02:16:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:48,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:16:48,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 02:16:48,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 02:16:48,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:48,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752539812] [2023-04-02 02:16:48,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:48,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554417336] [2023-04-02 02:16:48,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554417336] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:48,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:48,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 02:16:48,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517222497] [2023-04-02 02:16:48,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:48,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 02:16:48,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:48,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 02:16:48,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 02:16:48,765 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-02 02:16:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:48,845 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2023-04-02 02:16:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:16:48,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2023-04-02 02:16:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:48,846 INFO L225 Difference]: With dead ends: 164 [2023-04-02 02:16:48,846 INFO L226 Difference]: Without dead ends: 134 [2023-04-02 02:16:48,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:16:48,847 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:48,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 130 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-02 02:16:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2023-04-02 02:16:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 87 states have internal predecessors, (94), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-02 02:16:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 145 transitions. [2023-04-02 02:16:48,862 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 145 transitions. Word has length 38 [2023-04-02 02:16:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:48,862 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 145 transitions. [2023-04-02 02:16:48,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-02 02:16:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 145 transitions. [2023-04-02 02:16:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 02:16:48,863 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:48,863 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:48,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:49,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:49,067 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:49,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:49,068 INFO L85 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2023-04-02 02:16:49,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:49,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262865394] [2023-04-02 02:16:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:49,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:49,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:49,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848375028] [2023-04-02 02:16:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:49,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:49,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:49,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:49,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 02:16:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:49,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:16:49,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:16:49,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 02:16:49,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:49,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262865394] [2023-04-02 02:16:49,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:49,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848375028] [2023-04-02 02:16:49,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848375028] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:49,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:49,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-02 02:16:49,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210671303] [2023-04-02 02:16:49,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:49,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 02:16:49,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:49,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 02:16:49,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:16:49,280 INFO L87 Difference]: Start difference. First operand 128 states and 145 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-04-02 02:16:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:49,402 INFO L93 Difference]: Finished difference Result 232 states and 271 transitions. [2023-04-02 02:16:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 02:16:49,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 54 [2023-04-02 02:16:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:49,404 INFO L225 Difference]: With dead ends: 232 [2023-04-02 02:16:49,404 INFO L226 Difference]: Without dead ends: 216 [2023-04-02 02:16:49,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:16:49,405 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 71 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:49,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 212 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-04-02 02:16:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 209. [2023-04-02 02:16:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 137 states have (on average 1.1532846715328466) internal successors, (158), 147 states have internal predecessors, (158), 44 states have call successors, (44), 29 states have call predecessors, (44), 27 states have return successors, (38), 32 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-02 02:16:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 240 transitions. [2023-04-02 02:16:49,425 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 240 transitions. Word has length 54 [2023-04-02 02:16:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:49,425 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 240 transitions. [2023-04-02 02:16:49,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-04-02 02:16:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 240 transitions. [2023-04-02 02:16:49,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 02:16:49,426 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:49,426 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:49,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:49,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:49,631 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:49,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:49,631 INFO L85 PathProgramCache]: Analyzing trace with hash 608357748, now seen corresponding path program 1 times [2023-04-02 02:16:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:49,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018101044] [2023-04-02 02:16:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:49,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:49,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:49,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988139091] [2023-04-02 02:16:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:49,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:49,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:49,638 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:49,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 02:16:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:49,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 02:16:49,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 02:16:49,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:16:49,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:49,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018101044] [2023-04-02 02:16:49,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:49,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988139091] [2023-04-02 02:16:49,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988139091] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:49,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:49,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 02:16:49,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446325307] [2023-04-02 02:16:49,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:49,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 02:16:49,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:49,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 02:16:49,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:16:49,764 INFO L87 Difference]: Start difference. First operand 209 states and 240 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-02 02:16:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:49,850 INFO L93 Difference]: Finished difference Result 231 states and 265 transitions. [2023-04-02 02:16:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 02:16:49,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2023-04-02 02:16:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:49,862 INFO L225 Difference]: With dead ends: 231 [2023-04-02 02:16:49,862 INFO L226 Difference]: Without dead ends: 211 [2023-04-02 02:16:49,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:16:49,863 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:49,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 104 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-04-02 02:16:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2023-04-02 02:16:49,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 138 states have (on average 1.144927536231884) internal successors, (158), 145 states have internal predecessors, (158), 43 states have call successors, (43), 28 states have call predecessors, (43), 27 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-02 02:16:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 239 transitions. [2023-04-02 02:16:49,929 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 239 transitions. Word has length 65 [2023-04-02 02:16:49,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:49,929 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 239 transitions. [2023-04-02 02:16:49,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-02 02:16:49,929 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 239 transitions. [2023-04-02 02:16:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 02:16:49,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:49,949 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:49,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:50,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 02:16:50,150 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:50,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2023-04-02 02:16:50,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:50,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794481376] [2023-04-02 02:16:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:50,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:50,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:50,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044087783] [2023-04-02 02:16:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:50,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:50,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:50,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 02:16:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:50,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 02:16:50,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 02:16:50,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 02:16:52,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794481376] [2023-04-02 02:16:52,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044087783] [2023-04-02 02:16:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044087783] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:52,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-04-02 02:16:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813151032] [2023-04-02 02:16:52,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:52,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 02:16:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 02:16:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-04-02 02:16:52,479 INFO L87 Difference]: Start difference. First operand 209 states and 239 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-02 02:16:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:59,662 INFO L93 Difference]: Finished difference Result 342 states and 417 transitions. [2023-04-02 02:16:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 02:16:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 68 [2023-04-02 02:16:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:59,663 INFO L225 Difference]: With dead ends: 342 [2023-04-02 02:16:59,663 INFO L226 Difference]: Without dead ends: 281 [2023-04-02 02:16:59,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2023-04-02 02:16:59,664 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:59,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 276 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 02:16:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-04-02 02:16:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 252. [2023-04-02 02:16:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 178 states have internal predecessors, (198), 51 states have call successors, (51), 32 states have call predecessors, (51), 30 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-02 02:16:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 295 transitions. [2023-04-02 02:16:59,703 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 295 transitions. Word has length 68 [2023-04-02 02:16:59,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:59,703 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 295 transitions. [2023-04-02 02:16:59,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-02 02:16:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 295 transitions. [2023-04-02 02:16:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 02:16:59,704 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:59,704 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:59,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:59,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:59,910 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:59,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2023-04-02 02:16:59,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:59,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350306454] [2023-04-02 02:16:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:59,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:59,918 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:59,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806553581] [2023-04-02 02:16:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:59,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:59,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:59,919 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:59,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 02:16:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:59,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 02:16:59,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:17:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 02:17:00,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:17:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 02:17:01,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:17:01,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350306454] [2023-04-02 02:17:01,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:17:01,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806553581] [2023-04-02 02:17:01,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806553581] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:17:01,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:17:01,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-04-02 02:17:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632898843] [2023-04-02 02:17:01,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:17:01,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 02:17:01,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:17:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 02:17:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-04-02 02:17:01,772 INFO L87 Difference]: Start difference. First operand 252 states and 295 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2023-04-02 02:17:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:17:06,111 INFO L93 Difference]: Finished difference Result 379 states and 463 transitions. [2023-04-02 02:17:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 02:17:06,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 79 [2023-04-02 02:17:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:17:06,113 INFO L225 Difference]: With dead ends: 379 [2023-04-02 02:17:06,113 INFO L226 Difference]: Without dead ends: 302 [2023-04-02 02:17:06,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2023-04-02 02:17:06,114 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 78 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 02:17:06,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 338 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 02:17:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-04-02 02:17:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 279. [2023-04-02 02:17:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 188 states have (on average 1.1542553191489362) internal successors, (217), 194 states have internal predecessors, (217), 57 states have call successors, (57), 34 states have call predecessors, (57), 33 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2023-04-02 02:17:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 327 transitions. [2023-04-02 02:17:06,163 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 327 transitions. Word has length 79 [2023-04-02 02:17:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:17:06,164 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 327 transitions. [2023-04-02 02:17:06,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2023-04-02 02:17:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 327 transitions. [2023-04-02 02:17:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 02:17:06,165 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:17:06,165 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:17:06,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 02:17:06,370 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,SelfDestructingSolverStorable11 [2023-04-02 02:17:06,370 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:17:06,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:17:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash 437079945, now seen corresponding path program 2 times [2023-04-02 02:17:06,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:17:06,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167904106] [2023-04-02 02:17:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:17:06,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:17:06,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:17:06,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714458559] [2023-04-02 02:17:06,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:17:06,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:17:06,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:17:06,389 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:17:06,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 02:17:06,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:17:06,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:17:06,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:17:06,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:17:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 02:17:06,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:17:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 02:17:06,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:17:06,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167904106] [2023-04-02 02:17:06,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:17:06,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714458559] [2023-04-02 02:17:06,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714458559] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:17:06,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:17:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-04-02 02:17:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956408309] [2023-04-02 02:17:06,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:17:06,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:17:06,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:17:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:17:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:17:06,558 INFO L87 Difference]: Start difference. First operand 279 states and 327 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-04-02 02:17:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:17:06,649 INFO L93 Difference]: Finished difference Result 316 states and 375 transitions. [2023-04-02 02:17:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 02:17:06,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2023-04-02 02:17:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:17:06,650 INFO L225 Difference]: With dead ends: 316 [2023-04-02 02:17:06,650 INFO L226 Difference]: Without dead ends: 237 [2023-04-02 02:17:06,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:17:06,651 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:17:06,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:17:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-04-02 02:17:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-04-02 02:17:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 159 states have (on average 1.1446540880503144) internal successors, (182), 164 states have internal predecessors, (182), 48 states have call successors, (48), 30 states have call predecessors, (48), 29 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2023-04-02 02:17:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 275 transitions. [2023-04-02 02:17:06,690 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 275 transitions. Word has length 82 [2023-04-02 02:17:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:17:06,691 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 275 transitions. [2023-04-02 02:17:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-04-02 02:17:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 275 transitions. [2023-04-02 02:17:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 02:17:06,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:17:06,696 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:17:06,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 02:17:06,902 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,SelfDestructingSolverStorable12 [2023-04-02 02:17:06,902 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:17:06,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:17:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 3 times [2023-04-02 02:17:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:17:06,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463638598] [2023-04-02 02:17:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:17:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:17:06,914 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:17:06,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032799991] [2023-04-02 02:17:06,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:17:06,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:17:06,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:17:06,929 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:17:06,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 02:17:07,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 02:17:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:17:07,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-02 02:17:07,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:17:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 02:17:07,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:17:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 02:17:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:17:55,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463638598] [2023-04-02 02:17:55,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:17:55,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032799991] [2023-04-02 02:17:55,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032799991] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:17:55,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:17:55,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-04-02 02:17:55,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840964586] [2023-04-02 02:17:55,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:17:55,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 02:17:55,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:17:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 02:17:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:17:55,201 INFO L87 Difference]: Start difference. First operand 237 states and 275 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-04-02 02:19:19,014 WARN L223 SmtUtils]: Spent 1.37m on a formula simplification. DAG size of input: 172 DAG size of output: 28 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:19:21,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:19:26,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:19:28,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:19:30,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:19:31,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:19:34,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:19:36,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:19:39,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:19:41,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:19:57,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:01,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:03,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:09,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:20:10,054 INFO L93 Difference]: Finished difference Result 316 states and 395 transitions. [2023-04-02 02:20:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 02:20:10,055 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 100 [2023-04-02 02:20:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:20:10,056 INFO L225 Difference]: With dead ends: 316 [2023-04-02 02:20:10,056 INFO L226 Difference]: Without dead ends: 278 [2023-04-02 02:20:10,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 106.7s TimeCoverageRelationStatistics Valid=136, Invalid=619, Unknown=1, NotChecked=0, Total=756 [2023-04-02 02:20:10,057 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 118 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 133 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.5s IncrementalHoareTripleChecker+Time [2023-04-02 02:20:10,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 373 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 669 Invalid, 6 Unknown, 0 Unchecked, 35.5s Time] [2023-04-02 02:20:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-04-02 02:20:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 258. [2023-04-02 02:20:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 171 states have (on average 1.1637426900584795) internal successors, (199), 179 states have internal predecessors, (199), 56 states have call successors, (56), 31 states have call predecessors, (56), 30 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2023-04-02 02:20:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 308 transitions. [2023-04-02 02:20:10,095 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 308 transitions. Word has length 100 [2023-04-02 02:20:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:20:10,095 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 308 transitions. [2023-04-02 02:20:10,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-04-02 02:20:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 308 transitions. [2023-04-02 02:20:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 02:20:10,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:20:10,096 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:20:10,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 02:20:10,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 02:20:10,300 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:20:10,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:20:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash -799884160, now seen corresponding path program 1 times [2023-04-02 02:20:10,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:20:10,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300160313] [2023-04-02 02:20:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:20:10,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:20:10,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:20:10,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683911338] [2023-04-02 02:20:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:20:10,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:20:10,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:20:10,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:20:10,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 02:20:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:20:10,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 02:20:10,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:20:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-02 02:20:10,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:20:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-04-02 02:20:10,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:20:10,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300160313] [2023-04-02 02:20:10,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:20:10,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683911338] [2023-04-02 02:20:10,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683911338] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:20:10,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:20:10,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 02:20:10,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138842027] [2023-04-02 02:20:10,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:20:10,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 02:20:10,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:20:10,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 02:20:10,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:20:10,587 INFO L87 Difference]: Start difference. First operand 258 states and 308 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2023-04-02 02:20:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:20:11,053 INFO L93 Difference]: Finished difference Result 671 states and 829 transitions. [2023-04-02 02:20:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 02:20:11,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 106 [2023-04-02 02:20:11,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:20:11,056 INFO L225 Difference]: With dead ends: 671 [2023-04-02 02:20:11,056 INFO L226 Difference]: Without dead ends: 569 [2023-04-02 02:20:11,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-04-02 02:20:11,061 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 142 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:20:11,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 249 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 02:20:11,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-04-02 02:20:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 548. [2023-04-02 02:20:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 357 states have (on average 1.1932773109243697) internal successors, (426), 384 states have internal predecessors, (426), 124 states have call successors, (124), 68 states have call predecessors, (124), 66 states have return successors, (114), 95 states have call predecessors, (114), 114 states have call successors, (114) [2023-04-02 02:20:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 664 transitions. [2023-04-02 02:20:11,151 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 664 transitions. Word has length 106 [2023-04-02 02:20:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:20:11,151 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 664 transitions. [2023-04-02 02:20:11,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2023-04-02 02:20:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 664 transitions. [2023-04-02 02:20:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-02 02:20:11,152 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:20:11,152 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:20:11,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 02:20:11,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 02:20:11,357 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:20:11,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:20:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1412827450, now seen corresponding path program 2 times [2023-04-02 02:20:11,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:20:11,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478619487] [2023-04-02 02:20:11,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:20:11,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:20:11,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:20:11,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370299370] [2023-04-02 02:20:11,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:20:11,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:20:11,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:20:11,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:20:11,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 02:20:11,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:20:11,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:20:11,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 02:20:11,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:20:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-04-02 02:20:12,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:20:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-04-02 02:20:21,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:20:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478619487] [2023-04-02 02:20:21,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:20:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370299370] [2023-04-02 02:20:21,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370299370] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:20:21,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:20:21,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-04-02 02:20:21,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525302782] [2023-04-02 02:20:21,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:20:21,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 02:20:21,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:20:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 02:20:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2023-04-02 02:20:21,907 INFO L87 Difference]: Start difference. First operand 548 states and 664 transitions. Second operand has 27 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2023-04-02 02:20:33,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:37,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:44,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:20:44,424 INFO L93 Difference]: Finished difference Result 686 states and 853 transitions. [2023-04-02 02:20:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 02:20:44,425 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) Word has length 111 [2023-04-02 02:20:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:20:44,426 INFO L225 Difference]: With dead ends: 686 [2023-04-02 02:20:44,427 INFO L226 Difference]: Without dead ends: 552 [2023-04-02 02:20:44,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=387, Invalid=1173, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 02:20:44,428 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 109 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 142 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:20:44,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 338 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 561 Invalid, 3 Unknown, 0 Unchecked, 11.2s Time] [2023-04-02 02:20:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-04-02 02:20:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 511. [2023-04-02 02:20:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 332 states have (on average 1.1957831325301205) internal successors, (397), 356 states have internal predecessors, (397), 116 states have call successors, (116), 63 states have call predecessors, (116), 62 states have return successors, (107), 91 states have call predecessors, (107), 107 states have call successors, (107) [2023-04-02 02:20:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 620 transitions. [2023-04-02 02:20:44,590 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 620 transitions. Word has length 111 [2023-04-02 02:20:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:20:44,590 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 620 transitions. [2023-04-02 02:20:44,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2023-04-02 02:20:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 620 transitions. [2023-04-02 02:20:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-02 02:20:44,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:20:44,591 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:20:44,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 02:20:44,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:20:44,796 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:20:44,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:20:44,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1562534599, now seen corresponding path program 1 times [2023-04-02 02:20:44,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:20:44,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374230639] [2023-04-02 02:20:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:20:44,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:20:44,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:20:44,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618038754] [2023-04-02 02:20:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:20:44,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:20:44,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:20:44,812 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:20:44,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 02:20:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:20:44,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:20:44,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:20:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 02:20:44,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:20:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-04-02 02:20:45,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:20:45,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374230639] [2023-04-02 02:20:45,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:20:45,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618038754] [2023-04-02 02:20:45,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618038754] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:20:45,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:20:45,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-02 02:20:45,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147641270] [2023-04-02 02:20:45,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:20:45,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 02:20:45,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:20:45,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 02:20:45,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:20:45,119 INFO L87 Difference]: Start difference. First operand 511 states and 620 transitions. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 12 states have call successors, (38), 9 states have call predecessors, (38), 8 states have return successors, (36), 10 states have call predecessors, (36), 11 states have call successors, (36) [2023-04-02 02:20:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:20:45,537 INFO L93 Difference]: Finished difference Result 563 states and 679 transitions. [2023-04-02 02:20:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 02:20:45,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 12 states have call successors, (38), 9 states have call predecessors, (38), 8 states have return successors, (36), 10 states have call predecessors, (36), 11 states have call successors, (36) Word has length 118 [2023-04-02 02:20:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:20:45,539 INFO L225 Difference]: With dead ends: 563 [2023-04-02 02:20:45,540 INFO L226 Difference]: Without dead ends: 515 [2023-04-02 02:20:45,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 218 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2023-04-02 02:20:45,540 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 75 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:20:45,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 194 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 02:20:45,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-04-02 02:20:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 509. [2023-04-02 02:20:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 343 states have (on average 1.1428571428571428) internal successors, (392), 357 states have internal predecessors, (392), 107 states have call successors, (107), 60 states have call predecessors, (107), 58 states have return successors, (101), 91 states have call predecessors, (101), 101 states have call successors, (101) [2023-04-02 02:20:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 600 transitions. [2023-04-02 02:20:45,672 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 600 transitions. Word has length 118 [2023-04-02 02:20:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:20:45,672 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 600 transitions. [2023-04-02 02:20:45,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 12 states have call successors, (38), 9 states have call predecessors, (38), 8 states have return successors, (36), 10 states have call predecessors, (36), 11 states have call successors, (36) [2023-04-02 02:20:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 600 transitions. [2023-04-02 02:20:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 02:20:45,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:20:45,673 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:20:45,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 02:20:45,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 02:20:45,878 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:20:45,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:20:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash 965516822, now seen corresponding path program 1 times [2023-04-02 02:20:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:20:45,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052579783] [2023-04-02 02:20:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:20:45,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:20:45,892 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:20:45,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975006536] [2023-04-02 02:20:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:20:45,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:20:45,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:20:45,894 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:20:45,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 02:20:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:20:45,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:20:45,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:20:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-04-02 02:20:46,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:20:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-04-02 02:20:46,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:20:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052579783] [2023-04-02 02:20:46,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:20:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975006536] [2023-04-02 02:20:46,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975006536] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:20:46,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:20:46,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2023-04-02 02:20:46,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882742747] [2023-04-02 02:20:46,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:20:46,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:20:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:20:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:20:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:20:46,161 INFO L87 Difference]: Start difference. First operand 509 states and 600 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 02:20:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:20:46,395 INFO L93 Difference]: Finished difference Result 540 states and 639 transitions. [2023-04-02 02:20:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:20:46,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 129 [2023-04-02 02:20:46,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:20:46,401 INFO L225 Difference]: With dead ends: 540 [2023-04-02 02:20:46,401 INFO L226 Difference]: Without dead ends: 520 [2023-04-02 02:20:46,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 247 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:20:46,402 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:20:46,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 173 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:20:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-04-02 02:20:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 499. [2023-04-02 02:20:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 338 states have (on average 1.1331360946745561) internal successors, (383), 348 states have internal predecessors, (383), 102 states have call successors, (102), 59 states have call predecessors, (102), 58 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2023-04-02 02:20:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 582 transitions. [2023-04-02 02:20:46,531 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 582 transitions. Word has length 129 [2023-04-02 02:20:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:20:46,532 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 582 transitions. [2023-04-02 02:20:46,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 02:20:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 582 transitions. [2023-04-02 02:20:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-02 02:20:46,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:20:46,533 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:20:46,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 02:20:46,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 02:20:46,738 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:20:46,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:20:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2083091847, now seen corresponding path program 4 times [2023-04-02 02:20:46,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:20:46,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363138194] [2023-04-02 02:20:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:20:46,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:20:46,748 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:20:46,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277125869] [2023-04-02 02:20:46,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:20:46,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:20:46,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:20:46,749 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:20:46,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 02:20:46,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:20:46,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:20:46,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 59 conjunts are in the unsatisfiable core [2023-04-02 02:20:46,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:20:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 62 proven. 88 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-04-02 02:20:47,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:21:06,023 WARN L223 SmtUtils]: Spent 6.64s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)