/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/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:09:15,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:09:15,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:09:15,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 02:09:15,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 02:09:15,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 02:09:15,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 02:09:15,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 02:09:15,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 02:09:15,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 02:09:15,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 02:09:15,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 02:09:15,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:09:15,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:09:15,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:09:15,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:09:15,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:09:15,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:09:15,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:09:15,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:09:15,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:09:15,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:09:15,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:09:15,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:09:15,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 02:09:15,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 02:09:15,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 02:09:15,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 02:09:15,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 02:09:15,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 02:09:15,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 02:09:15,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 02:09:15,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 02:09:15,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:09:15,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:09:15,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:09:15,621 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 02:09:15,640 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:09:15,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:09:15,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:09:15,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:09:15,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:09:15,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:09:15,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:09:15,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:09:15,643 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:09:15,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:09:15,643 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:09:15,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:09:15,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:09:15,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:09:15,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:09:15,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:09:15,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:09:15,644 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:09:15,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:09:15,645 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:09:15,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:09:15,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:09:15,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:09:15,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:09:15,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:09:15,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:09:15,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:09:15,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:09:15,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:09:15,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:09:15,647 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:09:15,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:09:15,647 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:09:15,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:09:15,648 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:09:15,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:09:15,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:09:15,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:09:15,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:09:15,831 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:09:15,831 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:09:15,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2023-04-02 02:09:17,000 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:09:17,166 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:09:17,166 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2023-04-02 02:09:17,172 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f083a828a/11162d3877624ae8af19aff9255794d4/FLAGa586276c8 [2023-04-02 02:09:17,186 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f083a828a/11162d3877624ae8af19aff9255794d4 [2023-04-02 02:09:17,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:09:17,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:09:17,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:09:17,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:09:17,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:09:17,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3238ae4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17, skipping insertion in model container [2023-04-02 02:09:17,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:09:17,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:09:17,328 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/egcd2-ll_valuebound50.c[490,503] [2023-04-02 02:09:17,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:09:17,353 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:09:17,362 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/egcd2-ll_valuebound50.c[490,503] [2023-04-02 02:09:17,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:09:17,381 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:09:17,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17 WrapperNode [2023-04-02 02:09:17,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:09:17,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:09:17,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:09:17,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:09:17,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,416 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:09:17,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:09:17,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:09:17,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:09:17,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (1/1) ... [2023-04-02 02:09:17,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:09:17,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:17,445 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 02:09:17,453 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 02:09:17,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:09:17,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:09:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:09:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:09:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:09:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:09:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:09:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:09:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:09:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:09:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 02:09:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:09:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:09:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:09:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:09:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:09:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:09:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:09:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:09:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:09:17,543 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:09:17,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:09:17,692 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:09:17,698 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:09:17,698 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 02:09:17,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:09:17 BoogieIcfgContainer [2023-04-02 02:09:17,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:09:17,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:09:17,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:09:17,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:09:17,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:09:17" (1/3) ... [2023-04-02 02:09:17,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10282d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:09:17, skipping insertion in model container [2023-04-02 02:09:17,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:09:17" (2/3) ... [2023-04-02 02:09:17,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10282d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:09:17, skipping insertion in model container [2023-04-02 02:09:17,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:09:17" (3/3) ... [2023-04-02 02:09:17,706 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2023-04-02 02:09:17,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:09:17,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:09:17,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:09:17,825 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;@4b85c5fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:09:17,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:09:17,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 02:09:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 02:09:17,836 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:17,837 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 02:09:17,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:17,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2023-04-02 02:09:17,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:17,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327875154] [2023-04-02 02:09:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:17,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:18,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:18,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327875154] [2023-04-02 02:09:18,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 02:09:18,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780404268] [2023-04-02 02:09:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:18,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:18,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:18,026 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 02:09:18,027 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 02:09:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:18,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 02:09:18,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 02:09:18,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:09:18,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780404268] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:09:18,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:09:18,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 02:09:18,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489561496] [2023-04-02 02:09:18,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:09:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 02:09:18,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:18,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 02:09:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:09:18,222 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:09:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:18,241 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2023-04-02 02:09:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 02:09:18,243 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-02 02:09:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:18,249 INFO L225 Difference]: With dead ends: 73 [2023-04-02 02:09:18,249 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 02:09:18,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 42 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 02:09:18,255 INFO L413 NwaCegarLoop]: 51 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, 51 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 02:09:18,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:09:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 02:09:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 02:09:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 02:09:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2023-04-02 02:09:18,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2023-04-02 02:09:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:18,312 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2023-04-02 02:09:18,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:09:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2023-04-02 02:09:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 02:09:18,316 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:18,316 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 02:09:18,326 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 02:09:18,522 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 02:09:18,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:18,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:18,524 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2023-04-02 02:09:18,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:18,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659806150] [2023-04-02 02:09:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:18,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:18,563 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:18,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820848769] [2023-04-02 02:09:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:18,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:18,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:18,572 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 02:09:18,596 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 02:09:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:18,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:09:18,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 02:09:18,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 02:09:18,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659806150] [2023-04-02 02:09:18,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:18,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820848769] [2023-04-02 02:09:18,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820848769] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:18,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:18,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-04-02 02:09:18,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238615367] [2023-04-02 02:09:18,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:18,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 02:09:18,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:18,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 02:09:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 02:09:18,799 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:09:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:18,957 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-04-02 02:09:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:09:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2023-04-02 02:09:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:18,960 INFO L225 Difference]: With dead ends: 52 [2023-04-02 02:09:18,960 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 02:09:18,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:09:18,964 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:18,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 136 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:09:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 02:09:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-04-02 02:09:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 02:09:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-04-02 02:09:18,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2023-04-02 02:09:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:18,989 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-04-02 02:09:18,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:09:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-04-02 02:09:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 02:09:18,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:18,991 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:18,996 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 02:09:19,192 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,SelfDestructingSolverStorable1 [2023-04-02 02:09:19,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:19,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2023-04-02 02:09:19,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:19,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313385548] [2023-04-02 02:09:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:19,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:19,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424709369] [2023-04-02 02:09:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:19,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:19,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:19,210 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 02:09:19,213 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 02:09:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:19,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:09:19,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 02:09:19,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 02:09:19,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:19,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313385548] [2023-04-02 02:09:19,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:19,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424709369] [2023-04-02 02:09:19,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424709369] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:09:19,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:09:19,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-02 02:09:19,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783886283] [2023-04-02 02:09:19,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:09:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:09:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:09:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:09:19,473 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 02:09:19,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:19,524 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-04-02 02:09:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:09:19,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2023-04-02 02:09:19,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:19,526 INFO L225 Difference]: With dead ends: 43 [2023-04-02 02:09:19,526 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 02:09:19,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:09:19,529 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:19,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 136 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:09:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 02:09:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-02 02:09:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 02:09:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-04-02 02:09:19,540 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2023-04-02 02:09:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:19,540 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-04-02 02:09:19,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 02:09:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-04-02 02:09:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 02:09:19,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:19,541 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:19,551 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 02:09:19,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:19,747 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:19,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2023-04-02 02:09:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:19,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154592923] [2023-04-02 02:09:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:19,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:19,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:19,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098452078] [2023-04-02 02:09:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:19,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:19,765 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 02:09:19,792 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 02:09:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:19,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 02:09:19,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 02:09:20,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 02:09:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:20,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154592923] [2023-04-02 02:09:20,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:20,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098452078] [2023-04-02 02:09:20,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098452078] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:09:20,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:09:20,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-04-02 02:09:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388500185] [2023-04-02 02:09:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:09:20,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:09:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:09:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:09:20,115 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 02:09:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:20,161 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-02 02:09:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:09:20,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2023-04-02 02:09:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:20,163 INFO L225 Difference]: With dead ends: 54 [2023-04-02 02:09:20,163 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 02:09:20,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:09:20,164 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:20,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:09:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 02:09:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-04-02 02:09:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 02:09:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-04-02 02:09:20,175 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2023-04-02 02:09:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:20,175 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-04-02 02:09:20,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 02:09:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-04-02 02:09:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 02:09:20,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:20,177 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:20,184 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 02:09:20,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:20,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:20,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2023-04-02 02:09:20,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:20,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19690605] [2023-04-02 02:09:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:20,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:20,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:20,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460223372] [2023-04-02 02:09:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:20,405 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 02:09:20,407 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 02:09:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:20,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 02:09:20,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 02:09:20,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-02 02:09:20,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:20,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19690605] [2023-04-02 02:09:20,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:20,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460223372] [2023-04-02 02:09:20,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460223372] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:09:20,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:09:20,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-04-02 02:09:20,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840402176] [2023-04-02 02:09:20,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:09:20,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:09:20,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:09:20,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:09:20,777 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 02:09:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:20,838 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-04-02 02:09:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:09:20,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2023-04-02 02:09:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:20,839 INFO L225 Difference]: With dead ends: 58 [2023-04-02 02:09:20,840 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 02:09:20,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:09:20,841 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:20,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:09:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 02:09:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-04-02 02:09:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 02:09:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-04-02 02:09:20,871 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2023-04-02 02:09:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:20,871 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-04-02 02:09:20,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 02:09:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-04-02 02:09:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 02:09:20,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:20,873 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:20,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 02:09:21,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:21,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:21,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2023-04-02 02:09:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:21,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870105019] [2023-04-02 02:09:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:21,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:21,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717041712] [2023-04-02 02:09:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:21,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:21,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:21,105 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 02:09:21,107 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 02:09:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:21,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 02:09:21,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-02 02:09:21,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:21,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:21,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870105019] [2023-04-02 02:09:21,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:21,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717041712] [2023-04-02 02:09:21,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717041712] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:09:21,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:09:21,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-04-02 02:09:21,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477585706] [2023-04-02 02:09:21,376 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:21,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 02:09:21,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 02:09:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:09:21,377 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 02:09:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:21,481 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2023-04-02 02:09:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 02:09:21,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2023-04-02 02:09:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:21,487 INFO L225 Difference]: With dead ends: 62 [2023-04-02 02:09:21,487 INFO L226 Difference]: Without dead ends: 60 [2023-04-02 02:09:21,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:09:21,489 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:21,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:09:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-02 02:09:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-04-02 02:09:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 02:09:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-04-02 02:09:21,516 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2023-04-02 02:09:21,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:21,516 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-04-02 02:09:21,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 02:09:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-04-02 02:09:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-02 02:09:21,524 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:21,524 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:21,533 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 02:09:21,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:21,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:21,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2023-04-02 02:09:21,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:21,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372311975] [2023-04-02 02:09:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:21,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:21,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:21,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338208456] [2023-04-02 02:09:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:21,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:21,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:21,743 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 02:09:21,751 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 02:09:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:21,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:09:21,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 02:09:21,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 02:09:21,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:21,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372311975] [2023-04-02 02:09:21,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:21,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338208456] [2023-04-02 02:09:21,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338208456] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:21,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:21,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-04-02 02:09:21,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697766603] [2023-04-02 02:09:21,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:21,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 02:09:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 02:09:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:09:21,945 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-02 02:09:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:22,108 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2023-04-02 02:09:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 02:09:22,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2023-04-02 02:09:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:22,110 INFO L225 Difference]: With dead ends: 106 [2023-04-02 02:09:22,110 INFO L226 Difference]: Without dead ends: 98 [2023-04-02 02:09:22,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:09:22,111 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 36 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:22,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 183 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:09:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-02 02:09:22,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2023-04-02 02:09:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-02 02:09:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2023-04-02 02:09:22,133 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2023-04-02 02:09:22,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:22,134 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2023-04-02 02:09:22,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-02 02:09:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2023-04-02 02:09:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 02:09:22,135 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:22,135 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:22,144 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 02:09:22,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:22,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:22,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:22,341 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2023-04-02 02:09:22,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:22,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308192336] [2023-04-02 02:09:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:22,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:22,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:22,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552126900] [2023-04-02 02:09:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:22,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:22,367 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 02:09:22,370 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 02:09:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:22,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 02:09:22,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-04-02 02:09:22,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-02 02:09:22,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:22,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308192336] [2023-04-02 02:09:22,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:22,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552126900] [2023-04-02 02:09:22,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552126900] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:22,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:22,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-04-02 02:09:22,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118770996] [2023-04-02 02:09:22,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:22,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 02:09:22,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 02:09:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:09:22,642 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 6 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-04-02 02:09:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:22,935 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2023-04-02 02:09:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 02:09:22,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 6 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2023-04-02 02:09:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:22,938 INFO L225 Difference]: With dead ends: 132 [2023-04-02 02:09:22,938 INFO L226 Difference]: Without dead ends: 128 [2023-04-02 02:09:22,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-04-02 02:09:22,939 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 33 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:22,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 295 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 02:09:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-04-02 02:09:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2023-04-02 02:09:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-02 02:09:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2023-04-02 02:09:22,974 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2023-04-02 02:09:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:22,974 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2023-04-02 02:09:22,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 6 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-04-02 02:09:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2023-04-02 02:09:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 02:09:22,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:22,976 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:22,987 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 02:09:23,182 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,SelfDestructingSolverStorable7 [2023-04-02 02:09:23,182 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:23,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 2 times [2023-04-02 02:09:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:23,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322901883] [2023-04-02 02:09:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:23,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:23,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:23,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072812579] [2023-04-02 02:09:23,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:09:23,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:23,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:23,223 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 02:09:23,227 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 02:09:23,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:09:23,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:09:23,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 02:09:23,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 02:09:23,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-04-02 02:09:24,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322901883] [2023-04-02 02:09:24,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072812579] [2023-04-02 02:09:24,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072812579] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:24,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:24,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2023-04-02 02:09:24,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930516990] [2023-04-02 02:09:24,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:24,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 02:09:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 02:09:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-02 02:09:24,031 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2023-04-02 02:09:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:26,344 INFO L93 Difference]: Finished difference Result 138 states and 185 transitions. [2023-04-02 02:09:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 02:09:26,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 80 [2023-04-02 02:09:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:26,346 INFO L225 Difference]: With dead ends: 138 [2023-04-02 02:09:26,346 INFO L226 Difference]: Without dead ends: 136 [2023-04-02 02:09:26,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 02:09:26,348 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:26,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 188 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 02:09:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-04-02 02:09:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2023-04-02 02:09:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 67 states have internal predecessors, (76), 40 states have call successors, (40), 12 states have call predecessors, (40), 11 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-02 02:09:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 154 transitions. [2023-04-02 02:09:26,382 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 154 transitions. Word has length 80 [2023-04-02 02:09:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:26,382 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 154 transitions. [2023-04-02 02:09:26,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2023-04-02 02:09:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 154 transitions. [2023-04-02 02:09:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-02 02:09:26,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:26,384 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1] [2023-04-02 02:09:26,389 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 02:09:26,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:26,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:26,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:26,590 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 3 times [2023-04-02 02:09:26,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:26,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855509978] [2023-04-02 02:09:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:26,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:26,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:26,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672772533] [2023-04-02 02:09:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:09:26,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:26,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:26,602 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 02:09:26,620 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 02:09:26,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 02:09:26,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:09:26,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-02 02:09:26,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-04-02 02:09:26,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:28,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:28,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855509978] [2023-04-02 02:09:28,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:28,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672772533] [2023-04-02 02:09:28,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672772533] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:09:28,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:09:28,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-04-02 02:09:28,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912640986] [2023-04-02 02:09:28,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:28,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:09:28,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:28,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:09:28,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=230, Unknown=1, NotChecked=0, Total=272 [2023-04-02 02:09:28,177 INFO L87 Difference]: Start difference. First operand 117 states and 154 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 02:09:29,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:09:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:29,933 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2023-04-02 02:09:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 02:09:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2023-04-02 02:09:29,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:29,935 INFO L225 Difference]: With dead ends: 153 [2023-04-02 02:09:29,935 INFO L226 Difference]: Without dead ends: 151 [2023-04-02 02:09:29,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=353, Unknown=1, NotChecked=0, Total=420 [2023-04-02 02:09:29,936 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:29,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 200 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 02:09:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-04-02 02:09:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2023-04-02 02:09:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 86 states have internal predecessors, (97), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-02 02:09:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 191 transitions. [2023-04-02 02:09:29,983 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 191 transitions. Word has length 85 [2023-04-02 02:09:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:29,984 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 191 transitions. [2023-04-02 02:09:29,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 02:09:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 191 transitions. [2023-04-02 02:09:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-02 02:09:29,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:29,985 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:29,993 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 02:09:30,190 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,SelfDestructingSolverStorable9 [2023-04-02 02:09:30,191 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:30,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:30,191 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2023-04-02 02:09:30,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:30,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537288056] [2023-04-02 02:09:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:30,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:30,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:30,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885940589] [2023-04-02 02:09:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:30,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:30,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:30,219 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 02:09:30,221 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 02:09:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:30,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-02 02:09:30,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-04-02 02:09:30,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-02 02:09:31,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:31,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537288056] [2023-04-02 02:09:31,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:31,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885940589] [2023-04-02 02:09:31,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885940589] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:31,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:31,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-04-02 02:09:31,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422521521] [2023-04-02 02:09:31,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:31,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 02:09:31,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 02:09:31,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:09:31,679 INFO L87 Difference]: Start difference. First operand 148 states and 191 transitions. Second operand has 21 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2023-04-02 02:09:39,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:39,799 INFO L93 Difference]: Finished difference Result 238 states and 326 transitions. [2023-04-02 02:09:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 02:09:39,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 91 [2023-04-02 02:09:39,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:39,801 INFO L225 Difference]: With dead ends: 238 [2023-04-02 02:09:39,801 INFO L226 Difference]: Without dead ends: 230 [2023-04-02 02:09:39,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 02:09:39,803 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 95 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:39,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 333 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 02:09:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-04-02 02:09:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2023-04-02 02:09:39,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 125 states have internal predecessors, (145), 84 states have call successors, (84), 19 states have call predecessors, (84), 18 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2023-04-02 02:09:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 311 transitions. [2023-04-02 02:09:39,881 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 311 transitions. Word has length 91 [2023-04-02 02:09:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:39,882 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 311 transitions. [2023-04-02 02:09:39,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2023-04-02 02:09:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 311 transitions. [2023-04-02 02:09:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 02:09:39,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:39,883 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:39,891 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 02:09:40,088 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,SelfDestructingSolverStorable10 [2023-04-02 02:09:40,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:40,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2023-04-02 02:09:40,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:40,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582523041] [2023-04-02 02:09:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:40,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:40,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368622317] [2023-04-02 02:09:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:40,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:40,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:40,103 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 02:09:40,105 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 02:09:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:09:40,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-02 02:09:40,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-04-02 02:09:40,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-04-02 02:09:42,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:42,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582523041] [2023-04-02 02:09:42,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:42,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368622317] [2023-04-02 02:09:42,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368622317] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:42,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:42,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-04-02 02:09:42,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720803240] [2023-04-02 02:09:42,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:42,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 02:09:42,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 02:09:42,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-04-02 02:09:42,324 INFO L87 Difference]: Start difference. First operand 226 states and 311 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 19 states have internal predecessors, (45), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2023-04-02 02:09:44,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:09:59,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:10:01,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:10:08,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.96s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:10:13,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:10:17,766 WARN L539 Checker$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 02:10:20,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:10:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:10:30,585 INFO L93 Difference]: Finished difference Result 285 states and 397 transitions. [2023-04-02 02:10:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 02:10:30,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 19 states have internal predecessors, (45), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 107 [2023-04-02 02:10:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:10:30,588 INFO L225 Difference]: With dead ends: 285 [2023-04-02 02:10:30,588 INFO L226 Difference]: Without dead ends: 283 [2023-04-02 02:10:30,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 02:10:30,589 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 84 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 76 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2023-04-02 02:10:30,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 245 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 721 Invalid, 6 Unknown, 0 Unchecked, 21.4s Time] [2023-04-02 02:10:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-04-02 02:10:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2023-04-02 02:10:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 153 states have internal predecessors, (174), 103 states have call successors, (103), 20 states have call predecessors, (103), 19 states have return successors, (101), 97 states have call predecessors, (101), 101 states have call successors, (101) [2023-04-02 02:10:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 378 transitions. [2023-04-02 02:10:30,727 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 378 transitions. Word has length 107 [2023-04-02 02:10:30,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:10:30,727 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 378 transitions. [2023-04-02 02:10:30,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 19 states have internal predecessors, (45), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2023-04-02 02:10:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 378 transitions. [2023-04-02 02:10:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 02:10:30,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:10:30,729 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2023-04-02 02:10:30,735 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 02:10:30,935 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,SelfDestructingSolverStorable11 [2023-04-02 02:10:30,935 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:10:30,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:10:30,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1979573154, now seen corresponding path program 4 times [2023-04-02 02:10:30,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:10:30,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053049513] [2023-04-02 02:10:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:10:30,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:10:30,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:10:30,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094199889] [2023-04-02 02:10:30,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:10:30,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:10:30,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:10:30,965 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 02:10:30,971 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 02:10:31,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:10:31,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:10:31,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:10:31,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:10:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-02 02:10:31,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:10:31,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:10:31,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053049513] [2023-04-02 02:10:31,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:10:31,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094199889] [2023-04-02 02:10:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094199889] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:10:31,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:10:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 02:10:31,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719684606] [2023-04-02 02:10:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:10:31,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:10:31,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:10:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:10:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:10:31,063 INFO L87 Difference]: Start difference. First operand 271 states and 378 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-04-02 02:10:31,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:10:31,218 INFO L93 Difference]: Finished difference Result 354 states and 492 transitions. [2023-04-02 02:10:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:10:31,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2023-04-02 02:10:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:10:31,220 INFO L225 Difference]: With dead ends: 354 [2023-04-02 02:10:31,220 INFO L226 Difference]: Without dead ends: 240 [2023-04-02 02:10:31,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 02:10:31,222 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:10:31,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:10:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-02 02:10:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2023-04-02 02:10:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 126 states have internal predecessors, (139), 80 states have call successors, (80), 20 states have call predecessors, (80), 19 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-04-02 02:10:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 297 transitions. [2023-04-02 02:10:31,339 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 297 transitions. Word has length 110 [2023-04-02 02:10:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:10:31,339 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 297 transitions. [2023-04-02 02:10:31,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-04-02 02:10:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 297 transitions. [2023-04-02 02:10:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 02:10:31,341 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:10:31,341 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:10:31,352 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 02:10:31,546 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,SelfDestructingSolverStorable12 [2023-04-02 02:10:31,546 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:10:31,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:10:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 2 times [2023-04-02 02:10:31,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:10:31,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111678362] [2023-04-02 02:10:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:10:31,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:10:31,561 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:10:31,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001471636] [2023-04-02 02:10:31,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:10:31,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:10:31,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:10:31,566 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 02:10:31,567 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 02:10:31,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:10:31,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:10:31,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-02 02:10:31,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:10:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-04-02 02:10:32,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:10:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-04-02 02:10:33,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:10:33,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111678362] [2023-04-02 02:10:33,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:10:33,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001471636] [2023-04-02 02:10:33,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001471636] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:10:33,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:10:33,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-04-02 02:10:33,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184114643] [2023-04-02 02:10:33,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:10:33,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 02:10:33,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:10:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 02:10:33,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-04-02 02:10:33,191 INFO L87 Difference]: Start difference. First operand 223 states and 297 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2023-04-02 02:10:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:10:41,454 INFO L93 Difference]: Finished difference Result 310 states and 422 transitions. [2023-04-02 02:10:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 02:10:41,454 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) Word has length 127 [2023-04-02 02:10:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:10:41,456 INFO L225 Difference]: With dead ends: 310 [2023-04-02 02:10:41,456 INFO L226 Difference]: Without dead ends: 308 [2023-04-02 02:10:41,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 02:10:41,458 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 94 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-02 02:10:41,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 370 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-02 02:10:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-04-02 02:10:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 283. [2023-04-02 02:10:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 155 states have (on average 1.1290322580645162) internal successors, (175), 159 states have internal predecessors, (175), 104 states have call successors, (104), 24 states have call predecessors, (104), 23 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2023-04-02 02:10:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 381 transitions. [2023-04-02 02:10:41,605 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 381 transitions. Word has length 127 [2023-04-02 02:10:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:10:41,605 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 381 transitions. [2023-04-02 02:10:41,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2023-04-02 02:10:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 381 transitions. [2023-04-02 02:10:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 02:10:41,606 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:10:41,606 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 02:10:41,611 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 02:10:41,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:10:41,810 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:10:41,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:10:41,810 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 2 times [2023-04-02 02:10:41,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:10:41,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982550022] [2023-04-02 02:10:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:10:41,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:10:41,818 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:10:41,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856602117] [2023-04-02 02:10:41,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:10:41,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:10:41,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:10:41,820 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 02:10:41,822 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 02:10:41,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:10:41,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:10:41,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2023-04-02 02:10:41,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:10:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-04-02 02:10:42,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:10:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-04-02 02:10:43,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:10:43,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982550022] [2023-04-02 02:10:43,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:10:43,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856602117] [2023-04-02 02:10:43,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856602117] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:10:43,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:10:43,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-04-02 02:10:43,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057029936] [2023-04-02 02:10:43,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:10:43,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-02 02:10:43,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:10:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-02 02:10:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-04-02 02:10:43,745 INFO L87 Difference]: Start difference. First operand 283 states and 381 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 14 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2023-04-02 02:11:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:12,005 INFO L93 Difference]: Finished difference Result 409 states and 575 transitions. [2023-04-02 02:11:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-02 02:11:12,005 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 14 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) Word has length 138 [2023-04-02 02:11:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:12,007 INFO L225 Difference]: With dead ends: 409 [2023-04-02 02:11:12,007 INFO L226 Difference]: Without dead ends: 401 [2023-04-02 02:11:12,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=855, Invalid=4115, Unknown=0, NotChecked=0, Total=4970 [2023-04-02 02:11:12,009 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 212 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:12,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 478 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2023-04-02 02:11:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-02 02:11:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 384. [2023-04-02 02:11:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 201 states have (on average 1.1492537313432836) internal successors, (231), 206 states have internal predecessors, (231), 156 states have call successors, (156), 27 states have call predecessors, (156), 26 states have return successors, (154), 150 states have call predecessors, (154), 154 states have call successors, (154) [2023-04-02 02:11:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 541 transitions. [2023-04-02 02:11:12,257 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 541 transitions. Word has length 138 [2023-04-02 02:11:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:12,257 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 541 transitions. [2023-04-02 02:11:12,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 14 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2023-04-02 02:11:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 541 transitions. [2023-04-02 02:11:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-02 02:11:12,259 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:12,259 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:12,270 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 02:11:12,465 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,SelfDestructingSolverStorable14 [2023-04-02 02:11:12,465 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:12,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 3 times [2023-04-02 02:11:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286508859] [2023-04-02 02:11:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:12,474 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:12,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518912917] [2023-04-02 02:11:12,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:11:12,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:12,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:12,476 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 02:11:12,478 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 02:11:13,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 02:11:13,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:11:13,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 70 conjunts are in the unsatisfiable core [2023-04-02 02:11:13,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 112 proven. 61 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-04-02 02:11:14,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:16,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:16,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286508859] [2023-04-02 02:11:16,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:16,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518912917] [2023-04-02 02:11:16,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518912917] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:11:16,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:11:16,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-04-02 02:11:16,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519643666] [2023-04-02 02:11:16,147 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:11:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 02:11:16,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 02:11:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2023-04-02 02:11:16,149 INFO L87 Difference]: Start difference. First operand 384 states and 541 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-04-02 02:11:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:17,516 INFO L93 Difference]: Finished difference Result 423 states and 591 transitions. [2023-04-02 02:11:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 02:11:17,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 154 [2023-04-02 02:11:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:17,518 INFO L225 Difference]: With dead ends: 423 [2023-04-02 02:11:17,518 INFO L226 Difference]: Without dead ends: 421 [2023-04-02 02:11:17,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 02:11:17,519 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 46 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:17,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 284 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 02:11:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-04-02 02:11:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 417. [2023-04-02 02:11:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 219 states have (on average 1.1461187214611872) internal successors, (251), 224 states have internal predecessors, (251), 168 states have call successors, (168), 30 states have call predecessors, (168), 29 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2023-04-02 02:11:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 585 transitions. [2023-04-02 02:11:17,786 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 585 transitions. Word has length 154 [2023-04-02 02:11:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:17,787 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 585 transitions. [2023-04-02 02:11:17,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-04-02 02:11:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 585 transitions. [2023-04-02 02:11:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-02 02:11:17,789 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:17,789 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1] [2023-04-02 02:11:17,797 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 02:11:17,996 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,SelfDestructingSolverStorable15 [2023-04-02 02:11:17,997 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:17,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:17,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 3 times [2023-04-02 02:11:17,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:17,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792180642] [2023-04-02 02:11:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:18,012 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:18,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966337320] [2023-04-02 02:11:18,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:11:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:18,013 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 02:11:18,032 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 02:11:18,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 02:11:18,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:11:18,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 02:11:18,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 99 proven. 31 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2023-04-02 02:11:18,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:18,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:18,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792180642] [2023-04-02 02:11:18,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:18,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966337320] [2023-04-02 02:11:18,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966337320] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:11:18,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:11:18,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-04-02 02:11:18,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597162066] [2023-04-02 02:11:18,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:11:18,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:11:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:11:18,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-04-02 02:11:18,809 INFO L87 Difference]: Start difference. First operand 417 states and 585 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-02 02:11:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:19,335 INFO L93 Difference]: Finished difference Result 444 states and 621 transitions. [2023-04-02 02:11:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 02:11:19,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 157 [2023-04-02 02:11:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:19,338 INFO L225 Difference]: With dead ends: 444 [2023-04-02 02:11:19,338 INFO L226 Difference]: Without dead ends: 437 [2023-04-02 02:11:19,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2023-04-02 02:11:19,339 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 21 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:19,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 179 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 02:11:19,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-04-02 02:11:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 420. [2023-04-02 02:11:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 220 states have (on average 1.1409090909090909) internal successors, (251), 224 states have internal predecessors, (251), 169 states have call successors, (169), 31 states have call predecessors, (169), 30 states have return successors, (167), 164 states have call predecessors, (167), 167 states have call successors, (167) [2023-04-02 02:11:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 587 transitions. [2023-04-02 02:11:19,609 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 587 transitions. Word has length 157 [2023-04-02 02:11:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:19,610 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 587 transitions. [2023-04-02 02:11:19,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-02 02:11:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 587 transitions. [2023-04-02 02:11:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-02 02:11:19,612 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:19,612 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:19,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:19,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 02:11:19,818 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:19,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:19,818 INFO L85 PathProgramCache]: Analyzing trace with hash -192100217, now seen corresponding path program 4 times [2023-04-02 02:11:19,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:19,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232452577] [2023-04-02 02:11:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:19,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:19,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:19,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697682943] [2023-04-02 02:11:19,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:11:19,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:19,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:19,828 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:11:19,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 02:11:19,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:11:19,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:11:19,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 67 conjunts are in the unsatisfiable core [2023-04-02 02:11:19,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 50 proven. 96 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2023-04-02 02:11:20,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 984 trivial. 0 not checked. [2023-04-02 02:11:22,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:22,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232452577] [2023-04-02 02:11:22,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:22,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697682943] [2023-04-02 02:11:22,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697682943] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:11:22,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:11:22,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-04-02 02:11:22,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812158977] [2023-04-02 02:11:22,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:11:22,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 02:11:22,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 02:11:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-04-02 02:11:22,216 INFO L87 Difference]: Start difference. First operand 420 states and 587 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 16 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (55), 16 states have call predecessors, (55), 16 states have call successors, (55) [2023-04-02 02:11:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:54,876 INFO L93 Difference]: Finished difference Result 561 states and 799 transitions. [2023-04-02 02:11:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-02 02:11:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 16 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (55), 16 states have call predecessors, (55), 16 states have call successors, (55) Word has length 171 [2023-04-02 02:11:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:54,879 INFO L225 Difference]: With dead ends: 561 [2023-04-02 02:11:54,879 INFO L226 Difference]: Without dead ends: 559 [2023-04-02 02:11:54,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 02:11:54,881 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 125 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:54,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 521 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-04-02 02:11:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-04-02 02:11:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 507. [2023-04-02 02:11:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 265 states have (on average 1.1471698113207547) internal successors, (304), 269 states have internal predecessors, (304), 205 states have call successors, (205), 37 states have call predecessors, (205), 36 states have return successors, (203), 200 states have call predecessors, (203), 203 states have call successors, (203) [2023-04-02 02:11:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 712 transitions. [2023-04-02 02:11:55,278 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 712 transitions. Word has length 171 [2023-04-02 02:11:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:55,278 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 712 transitions. [2023-04-02 02:11:55,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 16 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (55), 16 states have call predecessors, (55), 16 states have call successors, (55) [2023-04-02 02:11:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 712 transitions. [2023-04-02 02:11:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-02 02:11:55,281 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:55,281 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 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] [2023-04-02 02:11:55,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 02:11:55,487 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:55,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:55,488 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 5 times [2023-04-02 02:11:55,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:55,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928577099] [2023-04-02 02:11:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:55,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:55,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87198892] [2023-04-02 02:11:55,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 02:11:55,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:55,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:55,501 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:11:55,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-02 02:12:04,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-04-02 02:12:04,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:12:04,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-02 02:12:04,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 131 proven. 285 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2023-04-02 02:12:09,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:12,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928577099] [2023-04-02 02:12:12,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87198892] [2023-04-02 02:12:12,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87198892] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:12:12,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:12:12,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-04-02 02:12:12,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294059116] [2023-04-02 02:12:12,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:12,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 02:12:12,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 02:12:12,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=491, Unknown=1, NotChecked=0, Total=552 [2023-04-02 02:12:12,059 INFO L87 Difference]: Start difference. First operand 507 states and 712 transitions. Second operand has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 12 states have call predecessors, (30), 9 states have call successors, (30) [2023-04-02 02:12:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:19,839 INFO L93 Difference]: Finished difference Result 572 states and 808 transitions. [2023-04-02 02:12:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 02:12:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 12 states have call predecessors, (30), 9 states have call successors, (30) Word has length 179 [2023-04-02 02:12:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:19,842 INFO L225 Difference]: With dead ends: 572 [2023-04-02 02:12:19,843 INFO L226 Difference]: Without dead ends: 570 [2023-04-02 02:12:19,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=140, Invalid=1191, Unknown=1, NotChecked=0, Total=1332 [2023-04-02 02:12:19,844 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 45 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:19,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 531 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-04-02 02:12:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-04-02 02:12:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 553. [2023-04-02 02:12:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 288 states have (on average 1.1493055555555556) internal successors, (331), 291 states have internal predecessors, (331), 225 states have call successors, (225), 40 states have call predecessors, (225), 39 states have return successors, (223), 221 states have call predecessors, (223), 223 states have call successors, (223) [2023-04-02 02:12:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 779 transitions. [2023-04-02 02:12:20,283 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 779 transitions. Word has length 179 [2023-04-02 02:12:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:20,283 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 779 transitions. [2023-04-02 02:12:20,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 12 states have call predecessors, (30), 9 states have call successors, (30) [2023-04-02 02:12:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 779 transitions. [2023-04-02 02:12:20,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-02 02:12:20,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:20,285 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:20,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:20,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:20,486 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:20,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 4 times [2023-04-02 02:12:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482505982] [2023-04-02 02:12:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:20,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:20,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:20,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567975292] [2023-04-02 02:12:20,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:12:20,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:20,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:20,496 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:12:20,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-02 02:12:20,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:12:20,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:12:20,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 78 conjunts are in the unsatisfiable core [2023-04-02 02:12:20,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 56 proven. 173 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2023-04-02 02:12:21,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 50 proven. 164 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2023-04-02 02:12:32,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:32,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482505982] [2023-04-02 02:12:32,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:32,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567975292] [2023-04-02 02:12:32,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567975292] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:32,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:32,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2023-04-02 02:12:32,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103689156] [2023-04-02 02:12:32,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:32,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 02:12:32,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 02:12:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 02:12:32,881 INFO L87 Difference]: Start difference. First operand 553 states and 779 transitions. Second operand has 35 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 31 states have internal predecessors, (65), 20 states have call successors, (61), 3 states have call predecessors, (61), 3 states have return successors, (59), 18 states have call predecessors, (59), 18 states have call successors, (59) [2023-04-02 02:12:35,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []