/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/cohencu-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:52:16,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:52:16,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:52:16,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 01:52:16,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:52:16,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:52:16,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:52:16,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:52:16,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:52:16,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:52:16,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:52:16,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:52:16,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:52:16,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:52:16,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:52:16,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:52:16,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 01:52:16,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:52:16,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:52:16,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:52:16,801 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 01:52:16,838 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:52:16,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:52:16,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:52:16,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:52:16,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:52:16,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:52:16,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:52:16,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:52:16,841 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:52:16,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:52:16,842 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:52:16,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:52:16,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:52:16,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:52:16,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:52:16,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:52:16,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:52:16,843 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:52:16,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:52:16,843 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:52:16,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:52:16,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:52:16,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:52:16,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:52:16,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:52:16,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:52:16,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:52:16,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:52:16,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:52:16,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:52:16,845 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:52:16,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:52:16,845 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:52:16,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:52:16,845 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:52:16,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:52:17,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:52:17,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:52:17,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:52:17,124 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:52:17,124 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:52:17,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2023-04-02 01:52:18,226 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:52:18,420 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:52:18,420 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2023-04-02 01:52:18,425 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebded52a/8d1512f8bf21467db2d4cbeab0badb5d/FLAG4b529897c [2023-04-02 01:52:18,438 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebded52a/8d1512f8bf21467db2d4cbeab0badb5d [2023-04-02 01:52:18,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:52:18,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:52:18,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:52:18,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:52:18,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:52:18,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc6703d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18, skipping insertion in model container [2023-04-02 01:52:18,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:52:18,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:52:18,592 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/cohencu-ll_unwindbound5.c[588,601] [2023-04-02 01:52:18,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:52:18,621 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:52:18,632 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/cohencu-ll_unwindbound5.c[588,601] [2023-04-02 01:52:18,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:52:18,657 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:52:18,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18 WrapperNode [2023-04-02 01:52:18,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:52:18,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:52:18,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:52:18,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:52:18,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,693 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:52:18,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:52:18,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:52:18,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:52:18,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (1/1) ... [2023-04-02 01:52:18,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:52:18,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:18,730 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 01:52:18,751 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 01:52:18,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:52:18,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:52:18,777 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:52:18,777 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 01:52:18,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:52:18,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:52:18,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:52:18,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:52:18,778 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:52:18,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:52:18,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2023-04-02 01:52:18,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 01:52:18,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:52:18,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:52:18,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:52:18,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:52:18,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:52:18,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:52:18,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:52:18,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:52:18,852 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:52:18,854 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:52:19,057 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:52:19,073 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:52:19,074 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 01:52:19,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:52:19 BoogieIcfgContainer [2023-04-02 01:52:19,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:52:19,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:52:19,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:52:19,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:52:19,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:52:18" (1/3) ... [2023-04-02 01:52:19,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7819a74b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:52:19, skipping insertion in model container [2023-04-02 01:52:19,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:52:18" (2/3) ... [2023-04-02 01:52:19,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7819a74b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:52:19, skipping insertion in model container [2023-04-02 01:52:19,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:52:19" (3/3) ... [2023-04-02 01:52:19,083 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound5.c [2023-04-02 01:52:19,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:52:19,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:52:19,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:52:19,163 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;@2abe2467, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:52:19,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:52:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 01:52:19,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 01:52:19,177 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:19,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:19,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:19,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1839589780, now seen corresponding path program 1 times [2023-04-02 01:52:19,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:19,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451184591] [2023-04-02 01:52:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:19,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:52:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:52:19,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:19,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451184591] [2023-04-02 01:52:19,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451184591] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:52:19,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:52:19,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 01:52:19,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809569116] [2023-04-02 01:52:19,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:52:19,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 01:52:19,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 01:52:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:52:19,449 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:52:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:19,611 INFO L93 Difference]: Finished difference Result 57 states and 95 transitions. [2023-04-02 01:52:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 01:52:19,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 01:52:19,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:19,620 INFO L225 Difference]: With dead ends: 57 [2023-04-02 01:52:19,620 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 01:52:19,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:52:19,632 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:19,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 39 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:52:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 01:52:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-04-02 01:52:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 01:52:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2023-04-02 01:52:19,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2023-04-02 01:52:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:19,695 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2023-04-02 01:52:19,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:52:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2023-04-02 01:52:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 01:52:19,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:19,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:19,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:52:19,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:19,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash 660459433, now seen corresponding path program 1 times [2023-04-02 01:52:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:19,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542529406] [2023-04-02 01:52:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:19,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:19,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:52:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:52:19,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:19,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542529406] [2023-04-02 01:52:19,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542529406] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:52:19,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:52:19,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:52:19,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559561007] [2023-04-02 01:52:19,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:52:19,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:52:19,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:19,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:52:19,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:52:19,941 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:52:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:20,050 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2023-04-02 01:52:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:52:20,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 01:52:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:20,052 INFO L225 Difference]: With dead ends: 40 [2023-04-02 01:52:20,052 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 01:52:20,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:52:20,054 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:20,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:52:20,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 01:52:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 01:52:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 01:52:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2023-04-02 01:52:20,063 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2023-04-02 01:52:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:20,063 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2023-04-02 01:52:20,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:52:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2023-04-02 01:52:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 01:52:20,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:20,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:20,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:52:20,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:20,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:20,065 INFO L85 PathProgramCache]: Analyzing trace with hash 662008565, now seen corresponding path program 1 times [2023-04-02 01:52:20,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:20,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432064201] [2023-04-02 01:52:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:20,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:20,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:52:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:52:20,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:20,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432064201] [2023-04-02 01:52:20,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432064201] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:52:20,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:52:20,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:52:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150284277] [2023-04-02 01:52:20,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:52:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:52:20,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:52:20,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:52:20,232 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:52:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:20,416 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-04-02 01:52:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:52:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 01:52:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:20,420 INFO L225 Difference]: With dead ends: 34 [2023-04-02 01:52:20,420 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 01:52:20,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:52:20,426 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:20,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 47 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:52:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 01:52:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 01:52:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 01:52:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-04-02 01:52:20,448 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2023-04-02 01:52:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:20,448 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-04-02 01:52:20,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:52:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-04-02 01:52:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 01:52:20,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:20,451 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:20,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 01:52:20,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:20,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:20,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2023221563, now seen corresponding path program 1 times [2023-04-02 01:52:20,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:20,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686257177] [2023-04-02 01:52:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:20,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:20,476 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:20,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546695894] [2023-04-02 01:52:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:20,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:20,480 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 01:52:20,482 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 01:52:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:20,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 01:52:20,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:52:20,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:52:20,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:20,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686257177] [2023-04-02 01:52:20,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:20,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546695894] [2023-04-02 01:52:20,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546695894] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:52:20,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:52:20,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-04-02 01:52:20,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003726179] [2023-04-02 01:52:20,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:20,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:52:20,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:20,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:52:20,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:52:20,839 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:52:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:21,145 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2023-04-02 01:52:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:52:21,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 17 [2023-04-02 01:52:21,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:21,148 INFO L225 Difference]: With dead ends: 58 [2023-04-02 01:52:21,148 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 01:52:21,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:52:21,149 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:21,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 85 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:52:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 01:52:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2023-04-02 01:52:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-02 01:52:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2023-04-02 01:52:21,165 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 17 [2023-04-02 01:52:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:21,165 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2023-04-02 01:52:21,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:52:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2023-04-02 01:52:21,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 01:52:21,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:21,166 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:21,177 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 01:52:21,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:21,372 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:21,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1612678773, now seen corresponding path program 1 times [2023-04-02 01:52:21,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:21,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054367470] [2023-04-02 01:52:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:21,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:21,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:21,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918614389] [2023-04-02 01:52:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:21,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:21,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:21,382 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 01:52:21,387 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 01:52:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:21,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 01:52:21,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:52:21,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:52:21,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:21,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054367470] [2023-04-02 01:52:21,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:21,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918614389] [2023-04-02 01:52:21,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918614389] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:52:21,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:52:21,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-04-02 01:52:21,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546230304] [2023-04-02 01:52:21,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:21,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:52:21,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:21,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:52:21,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:52:21,629 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 01:52:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:22,035 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2023-04-02 01:52:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:52:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2023-04-02 01:52:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:22,037 INFO L225 Difference]: With dead ends: 64 [2023-04-02 01:52:22,037 INFO L226 Difference]: Without dead ends: 62 [2023-04-02 01:52:22,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:52:22,038 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:22,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 129 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:52:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-02 01:52:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2023-04-02 01:52:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-02 01:52:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2023-04-02 01:52:22,057 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2023-04-02 01:52:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:22,058 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2023-04-02 01:52:22,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 01:52:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2023-04-02 01:52:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 01:52:22,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:22,059 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:22,067 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 01:52:22,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:22,265 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:22,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:22,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1625830715, now seen corresponding path program 1 times [2023-04-02 01:52:22,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:22,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474601567] [2023-04-02 01:52:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:22,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:22,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:22,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220737862] [2023-04-02 01:52:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:22,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:22,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:22,281 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 01:52:22,283 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 01:52:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:22,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 01:52:22,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:52:22,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:52:22,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:22,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474601567] [2023-04-02 01:52:22,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:22,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220737862] [2023-04-02 01:52:22,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220737862] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:52:22,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:52:22,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-04-02 01:52:22,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408265513] [2023-04-02 01:52:22,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:22,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:52:22,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:22,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:52:22,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:52:22,717 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-02 01:52:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:23,673 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2023-04-02 01:52:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:52:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 27 [2023-04-02 01:52:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:23,674 INFO L225 Difference]: With dead ends: 78 [2023-04-02 01:52:23,674 INFO L226 Difference]: Without dead ends: 69 [2023-04-02 01:52:23,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:52:23,676 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:23,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 84 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 01:52:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-04-02 01:52:23,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-04-02 01:52:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-02 01:52:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2023-04-02 01:52:23,696 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 27 [2023-04-02 01:52:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:23,696 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2023-04-02 01:52:23,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-02 01:52:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2023-04-02 01:52:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:52:23,698 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:23,698 INFO L195 NwaCegarLoop]: trace histogram [7, 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] [2023-04-02 01:52:23,707 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 01:52:23,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:23,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:23,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:23,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1440923632, now seen corresponding path program 1 times [2023-04-02 01:52:23,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:23,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314546048] [2023-04-02 01:52:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:23,916 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:23,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795539501] [2023-04-02 01:52:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:23,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:23,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:23,918 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 01:52:23,944 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 01:52:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:23,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:52:23,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 01:52:24,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 01:52:24,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:24,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314546048] [2023-04-02 01:52:24,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:24,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795539501] [2023-04-02 01:52:24,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795539501] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:52:24,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:52:24,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 01:52:24,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024034664] [2023-04-02 01:52:24,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:24,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:52:24,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:52:24,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:52:24,127 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 01:52:24,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:24,282 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2023-04-02 01:52:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 01:52:24,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 45 [2023-04-02 01:52:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:24,288 INFO L225 Difference]: With dead ends: 144 [2023-04-02 01:52:24,288 INFO L226 Difference]: Without dead ends: 123 [2023-04-02 01:52:24,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:52:24,293 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:24,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 124 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:52:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-02 01:52:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2023-04-02 01:52:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 64 states have internal predecessors, (67), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-02 01:52:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2023-04-02 01:52:24,341 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 45 [2023-04-02 01:52:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:24,341 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2023-04-02 01:52:24,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 01:52:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2023-04-02 01:52:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 01:52:24,343 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:24,343 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:24,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:52:24,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:24,549 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:24,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash 780782572, now seen corresponding path program 1 times [2023-04-02 01:52:24,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:24,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957380672] [2023-04-02 01:52:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:24,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:24,559 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:24,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357928033] [2023-04-02 01:52:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:24,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:24,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:24,566 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 01:52:24,570 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 01:52:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:24,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 01:52:24,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-02 01:52:24,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-02 01:52:24,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:24,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957380672] [2023-04-02 01:52:24,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:24,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357928033] [2023-04-02 01:52:24,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357928033] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:52:24,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:52:24,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-04-02 01:52:24,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19091567] [2023-04-02 01:52:24,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:24,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 01:52:24,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:24,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 01:52:24,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:52:24,900 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-02 01:52:27,162 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 01:52:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:27,295 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2023-04-02 01:52:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:52:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 50 [2023-04-02 01:52:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:27,297 INFO L225 Difference]: With dead ends: 133 [2023-04-02 01:52:27,297 INFO L226 Difference]: Without dead ends: 131 [2023-04-02 01:52:27,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:52:27,298 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:27,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 117 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 279 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-04-02 01:52:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-02 01:52:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-04-02 01:52:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 73 states have internal predecessors, (76), 43 states have call successors, (43), 19 states have call predecessors, (43), 18 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-02 01:52:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 157 transitions. [2023-04-02 01:52:27,334 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 157 transitions. Word has length 50 [2023-04-02 01:52:27,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:27,334 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 157 transitions. [2023-04-02 01:52:27,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-02 01:52:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 157 transitions. [2023-04-02 01:52:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 01:52:27,336 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:27,336 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:27,342 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 01:52:27,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:27,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:27,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash 113247916, now seen corresponding path program 2 times [2023-04-02 01:52:27,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:27,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417239850] [2023-04-02 01:52:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:27,550 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:27,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542749343] [2023-04-02 01:52:27,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:52:27,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:27,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:27,560 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 01:52:27,563 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 01:52:27,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:52:27,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:52:27,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 01:52:27,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-04-02 01:52:27,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-02 01:52:27,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417239850] [2023-04-02 01:52:27,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:27,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542749343] [2023-04-02 01:52:27,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542749343] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:52:27,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:52:27,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-04-02 01:52:27,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671227395] [2023-04-02 01:52:27,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:27,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 01:52:27,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:27,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 01:52:27,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:52:27,990 INFO L87 Difference]: Start difference. First operand 131 states and 157 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-02 01:52:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:28,549 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2023-04-02 01:52:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:52:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2023-04-02 01:52:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:28,551 INFO L225 Difference]: With dead ends: 145 [2023-04-02 01:52:28,552 INFO L226 Difference]: Without dead ends: 139 [2023-04-02 01:52:28,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-04-02 01:52:28,553 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:28,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 115 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 01:52:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-04-02 01:52:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-04-02 01:52:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 82 states have internal predecessors, (85), 39 states have call successors, (39), 22 states have call predecessors, (39), 21 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-02 01:52:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2023-04-02 01:52:28,586 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 60 [2023-04-02 01:52:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:28,586 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2023-04-02 01:52:28,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-02 01:52:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2023-04-02 01:52:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 01:52:28,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:28,588 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:28,599 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 01:52:28,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:28,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:28,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1284663070, now seen corresponding path program 1 times [2023-04-02 01:52:28,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:28,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588816257] [2023-04-02 01:52:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:28,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:28,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:28,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460645989] [2023-04-02 01:52:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:28,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:28,806 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 01:52:28,808 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 01:52:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:28,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 01:52:28,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-02 01:52:29,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:29,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:29,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588816257] [2023-04-02 01:52:29,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:29,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460645989] [2023-04-02 01:52:29,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460645989] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:52:29,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:52:29,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-02 01:52:29,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811250322] [2023-04-02 01:52:29,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:29,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 01:52:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 01:52:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:52:29,344 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-02 01:52:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:29,613 INFO L93 Difference]: Finished difference Result 145 states and 163 transitions. [2023-04-02 01:52:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:52:29,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2023-04-02 01:52:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:29,615 INFO L225 Difference]: With dead ends: 145 [2023-04-02 01:52:29,615 INFO L226 Difference]: Without dead ends: 141 [2023-04-02 01:52:29,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:52:29,616 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:29,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 113 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:52:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-02 01:52:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-04-02 01:52:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 80 states have (on average 1.075) internal successors, (86), 83 states have internal predecessors, (86), 39 states have call successors, (39), 23 states have call predecessors, (39), 21 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-02 01:52:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2023-04-02 01:52:29,648 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 71 [2023-04-02 01:52:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:29,648 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2023-04-02 01:52:29,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-02 01:52:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2023-04-02 01:52:29,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 01:52:29,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:29,659 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:29,669 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 01:52:29,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:29,865 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:29,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash -904350414, now seen corresponding path program 1 times [2023-04-02 01:52:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:29,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727447834] [2023-04-02 01:52:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:29,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:29,877 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:29,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473821634] [2023-04-02 01:52:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:29,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:29,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:29,878 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 01:52:29,881 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 01:52:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:29,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 01:52:29,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-04-02 01:52:30,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:30,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:30,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727447834] [2023-04-02 01:52:30,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:30,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473821634] [2023-04-02 01:52:30,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473821634] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:52:30,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:52:30,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-02 01:52:30,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409239182] [2023-04-02 01:52:30,412 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:30,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 01:52:30,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:30,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 01:52:30,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:52:30,413 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-02 01:52:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:30,669 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2023-04-02 01:52:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:52:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2023-04-02 01:52:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:30,670 INFO L225 Difference]: With dead ends: 143 [2023-04-02 01:52:30,670 INFO L226 Difference]: Without dead ends: 132 [2023-04-02 01:52:30,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:52:30,671 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:30,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 101 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:52:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-02 01:52:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-04-02 01:52:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 78 states have internal predecessors, (80), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-02 01:52:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2023-04-02 01:52:30,720 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 76 [2023-04-02 01:52:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:30,720 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2023-04-02 01:52:30,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-02 01:52:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2023-04-02 01:52:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-02 01:52:30,723 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:30,723 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:30,735 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 01:52:30,929 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,SelfDestructingSolverStorable10 [2023-04-02 01:52:30,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:30,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:30,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1364703347, now seen corresponding path program 3 times [2023-04-02 01:52:30,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:30,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671222340] [2023-04-02 01:52:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:30,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:30,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:30,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421100459] [2023-04-02 01:52:30,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:52:30,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:30,948 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 01:52:30,950 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 01:52:31,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 01:52:31,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:52:31,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 01:52:31,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 01:52:31,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 01:52:32,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:32,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671222340] [2023-04-02 01:52:32,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:32,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421100459] [2023-04-02 01:52:32,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421100459] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:52:32,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:52:32,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-04-02 01:52:32,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975872769] [2023-04-02 01:52:32,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:32,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:52:32,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:32,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:52:32,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:52:32,284 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 7 states have call predecessors, (27), 9 states have call successors, (27) [2023-04-02 01:52:35,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:52:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:37,312 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2023-04-02 01:52:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:52:37,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 7 states have call predecessors, (27), 9 states have call successors, (27) Word has length 83 [2023-04-02 01:52:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:37,313 INFO L225 Difference]: With dead ends: 143 [2023-04-02 01:52:37,313 INFO L226 Difference]: Without dead ends: 138 [2023-04-02 01:52:37,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-04-02 01:52:37,314 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 25 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:37,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 132 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 334 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-04-02 01:52:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-04-02 01:52:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2023-04-02 01:52:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 29 states have call successors, (29), 23 states have call predecessors, (29), 22 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-02 01:52:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2023-04-02 01:52:37,343 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 83 [2023-04-02 01:52:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:37,344 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2023-04-02 01:52:37,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 7 states have call predecessors, (27), 9 states have call successors, (27) [2023-04-02 01:52:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2023-04-02 01:52:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 01:52:37,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:37,345 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:37,351 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 01:52:37,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:37,551 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:37,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:37,552 INFO L85 PathProgramCache]: Analyzing trace with hash 386595463, now seen corresponding path program 2 times [2023-04-02 01:52:37,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:37,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323490245] [2023-04-02 01:52:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:37,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:37,578 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:37,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327687339] [2023-04-02 01:52:37,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:52:37,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:37,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:37,579 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 01:52:37,601 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 01:52:37,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:52:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:52:37,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-02 01:52:37,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 76 proven. 25 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-04-02 01:52:37,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2023-04-02 01:52:39,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:39,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323490245] [2023-04-02 01:52:39,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:39,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327687339] [2023-04-02 01:52:39,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327687339] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:52:39,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:52:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-04-02 01:52:39,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110507870] [2023-04-02 01:52:39,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:39,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:52:39,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:52:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:52:39,323 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand has 16 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2023-04-02 01:52:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:40,648 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2023-04-02 01:52:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:52:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 99 [2023-04-02 01:52:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:40,650 INFO L225 Difference]: With dead ends: 145 [2023-04-02 01:52:40,650 INFO L226 Difference]: Without dead ends: 141 [2023-04-02 01:52:40,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:52:40,651 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:40,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 155 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 01:52:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-02 01:52:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-04-02 01:52:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 88 states have internal predecessors, (90), 31 states have call successors, (31), 25 states have call predecessors, (31), 23 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-02 01:52:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 149 transitions. [2023-04-02 01:52:40,678 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 149 transitions. Word has length 99 [2023-04-02 01:52:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:40,679 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 149 transitions. [2023-04-02 01:52:40,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2023-04-02 01:52:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 149 transitions. [2023-04-02 01:52:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 01:52:40,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:40,680 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:40,689 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 01:52:40,885 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,SelfDestructingSolverStorable12 [2023-04-02 01:52:40,886 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:40,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1446042473, now seen corresponding path program 2 times [2023-04-02 01:52:40,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:40,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694147048] [2023-04-02 01:52:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:40,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:40,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:40,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071773811] [2023-04-02 01:52:40,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:52:40,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:40,898 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 01:52:40,901 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 01:52:40,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:52:40,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:52:40,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 01:52:40,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-04-02 01:52:41,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:41,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:41,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694147048] [2023-04-02 01:52:41,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:41,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071773811] [2023-04-02 01:52:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071773811] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:52:41,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:52:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-02 01:52:41,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881962591] [2023-04-02 01:52:41,907 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:41,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 01:52:41,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 01:52:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-02 01:52:41,909 INFO L87 Difference]: Start difference. First operand 141 states and 149 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-02 01:52:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:42,208 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2023-04-02 01:52:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 01:52:42,209 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 104 [2023-04-02 01:52:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:42,210 INFO L225 Difference]: With dead ends: 143 [2023-04-02 01:52:42,210 INFO L226 Difference]: Without dead ends: 132 [2023-04-02 01:52:42,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:52:42,213 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:42,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 142 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:52:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-02 01:52:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-04-02 01:52:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 81 states have (on average 1.037037037037037) internal successors, (84), 83 states have internal predecessors, (84), 28 states have call successors, (28), 23 states have call predecessors, (28), 22 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-02 01:52:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2023-04-02 01:52:42,238 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 104 [2023-04-02 01:52:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:42,239 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2023-04-02 01:52:42,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-02 01:52:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2023-04-02 01:52:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 01:52:42,241 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:42,242 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:42,249 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 01:52:42,445 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,SelfDestructingSolverStorable13 [2023-04-02 01:52:42,445 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:42,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash -167438485, now seen corresponding path program 2 times [2023-04-02 01:52:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:42,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554095040] [2023-04-02 01:52:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:42,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:42,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:42,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554351465] [2023-04-02 01:52:42,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:52:42,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:42,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:42,462 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 01:52:42,465 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 01:52:42,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:52:42,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:52:42,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 01:52:42,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-02 01:52:42,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-04-02 01:52:42,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:42,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554095040] [2023-04-02 01:52:42,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:42,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554351465] [2023-04-02 01:52:42,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554351465] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:52:42,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:52:42,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2023-04-02 01:52:42,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290855747] [2023-04-02 01:52:42,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:42,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:52:42,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:52:42,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:52:42,829 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2023-04-02 01:52:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:42,985 INFO L93 Difference]: Finished difference Result 188 states and 198 transitions. [2023-04-02 01:52:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 01:52:42,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) Word has length 129 [2023-04-02 01:52:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:42,987 INFO L225 Difference]: With dead ends: 188 [2023-04-02 01:52:42,987 INFO L226 Difference]: Without dead ends: 174 [2023-04-02 01:52:42,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 244 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:52:42,988 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:42,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:52:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-04-02 01:52:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2023-04-02 01:52:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 108 states have internal predecessors, (110), 37 states have call successors, (37), 30 states have call predecessors, (37), 29 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-02 01:52:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 181 transitions. [2023-04-02 01:52:43,018 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 181 transitions. Word has length 129 [2023-04-02 01:52:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:43,018 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 181 transitions. [2023-04-02 01:52:43,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2023-04-02 01:52:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 181 transitions. [2023-04-02 01:52:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-02 01:52:43,019 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:43,020 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:43,029 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 01:52:43,224 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,SelfDestructingSolverStorable14 [2023-04-02 01:52:43,224 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:43,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash 173938976, now seen corresponding path program 3 times [2023-04-02 01:52:43,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:43,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773027842] [2023-04-02 01:52:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:43,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:43,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:43,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984571601] [2023-04-02 01:52:43,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:52:43,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:43,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:43,234 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 01:52:43,237 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 01:52:43,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 01:52:43,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:52:43,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-02 01:52:43,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 88 proven. 67 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-04-02 01:52:43,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:52:44,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:52:44,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773027842] [2023-04-02 01:52:44,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:52:44,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984571601] [2023-04-02 01:52:44,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984571601] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:52:44,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:52:44,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-02 01:52:44,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283175258] [2023-04-02 01:52:44,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 01:52:44,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 01:52:44,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:52:44,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 01:52:44,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-04-02 01:52:44,133 INFO L87 Difference]: Start difference. First operand 172 states and 181 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-02 01:52:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:52:44,640 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2023-04-02 01:52:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:52:44,641 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 132 [2023-04-02 01:52:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:52:44,642 INFO L225 Difference]: With dead ends: 178 [2023-04-02 01:52:44,642 INFO L226 Difference]: Without dead ends: 174 [2023-04-02 01:52:44,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-04-02 01:52:44,643 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 13 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:52:44,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 162 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:52:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-04-02 01:52:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2023-04-02 01:52:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 109 states have internal predecessors, (111), 37 states have call successors, (37), 31 states have call predecessors, (37), 29 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-02 01:52:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 182 transitions. [2023-04-02 01:52:44,681 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 182 transitions. Word has length 132 [2023-04-02 01:52:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:52:44,682 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 182 transitions. [2023-04-02 01:52:44,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-02 01:52:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 182 transitions. [2023-04-02 01:52:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 01:52:44,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:52:44,683 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:52:44,690 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 01:52:44,889 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,SelfDestructingSolverStorable15 [2023-04-02 01:52:44,890 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:52:44,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:52:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1252848592, now seen corresponding path program 1 times [2023-04-02 01:52:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:52:44,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925637426] [2023-04-02 01:52:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:44,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:52:44,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:52:44,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153850797] [2023-04-02 01:52:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:52:44,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:52:44,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:52:44,900 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 01:52:44,903 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 01:52:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:52:44,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 01:52:44,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:52:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-04-02 01:52:45,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:53:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 108 refuted. 8 times theorem prover too weak. 886 trivial. 0 not checked. [2023-04-02 01:53:05,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:53:05,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925637426] [2023-04-02 01:53:05,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:53:05,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153850797] [2023-04-02 01:53:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153850797] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:53:05,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:53:05,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-04-02 01:53:05,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444106112] [2023-04-02 01:53:05,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:53:05,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 01:53:05,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:53:05,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 01:53:05,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=268, Unknown=1, NotChecked=0, Total=342 [2023-04-02 01:53:05,060 INFO L87 Difference]: Start difference. First operand 174 states and 182 transitions. Second operand has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 11 states have call predecessors, (47), 12 states have call successors, (47) [2023-04-02 01:53:31,357 WARN L223 SmtUtils]: Spent 25.10s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:53:55,087 WARN L223 SmtUtils]: Spent 13.54s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:53:57,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:53:59,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:01,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:04,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:06,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:18,913 WARN L223 SmtUtils]: Spent 11.71s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:54:21,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:23,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:40,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:42,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:44,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:46,556 WARN L539 Checker$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 01:54:48,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:50,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:53,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:55,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:54:57,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:55:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:55:07,167 INFO L93 Difference]: Finished difference Result 230 states and 279 transitions. [2023-04-02 01:55:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:55:07,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 11 states have call predecessors, (47), 12 states have call successors, (47) Word has length 137 [2023-04-02 01:55:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:55:07,169 INFO L225 Difference]: With dead ends: 230 [2023-04-02 01:55:07,169 INFO L226 Difference]: Without dead ends: 206 [2023-04-02 01:55:07,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 93.2s TimeCoverageRelationStatistics Valid=178, Invalid=568, Unknown=10, NotChecked=0, Total=756 [2023-04-02 01:55:07,170 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 32 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 81 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:55:07,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 203 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 576 Invalid, 14 Unknown, 0 Unchecked, 36.6s Time] [2023-04-02 01:55:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-04-02 01:55:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 195. [2023-04-02 01:55:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 109 states have (on average 1.091743119266055) internal successors, (119), 113 states have internal predecessors, (119), 58 states have call successors, (58), 28 states have call predecessors, (58), 27 states have return successors, (55), 53 states have call predecessors, (55), 55 states have call successors, (55) [2023-04-02 01:55:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 232 transitions. [2023-04-02 01:55:07,243 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 232 transitions. Word has length 137 [2023-04-02 01:55:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:55:07,244 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 232 transitions. [2023-04-02 01:55:07,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 11 states have call predecessors, (47), 12 states have call successors, (47) [2023-04-02 01:55:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 232 transitions. [2023-04-02 01:55:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-02 01:55:07,245 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:55:07,245 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:55:07,257 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 01:55:07,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:55:07,452 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:55:07,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:55:07,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2040587668, now seen corresponding path program 3 times [2023-04-02 01:55:07,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:55:07,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889263809] [2023-04-02 01:55:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:07,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:55:07,462 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:55:07,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811999447] [2023-04-02 01:55:07,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:55:07,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:55:07,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:55:07,463 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 01:55:07,464 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 01:55:07,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-04-02 01:55:07,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-04-02 01:55:07,598 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 01:55:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 01:55:07,718 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-04-02 01:55:07,719 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 01:55:07,720 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 01:55:07,728 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 01:55:07,928 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,SelfDestructingSolverStorable17 [2023-04-02 01:55:07,931 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:55:07,935 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 01:55:08,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 01:55:08 BoogieIcfgContainer [2023-04-02 01:55:08,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 01:55:08,009 INFO L158 Benchmark]: Toolchain (without parser) took 169562.34ms. Allocated memory was 250.6MB in the beginning and 300.9MB in the end (delta: 50.3MB). Free memory was 203.2MB in the beginning and 265.9MB in the end (delta: -62.7MB). Peak memory consumption was 161.7MB. Max. memory is 8.0GB. [2023-04-02 01:55:08,009 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 177.2MB. Free memory is still 128.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 01:55:08,010 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.50ms. Allocated memory is still 250.6MB. Free memory was 202.7MB in the beginning and 192.2MB in the end (delta: 10.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 01:55:08,010 INFO L158 Benchmark]: Boogie Preprocessor took 37.17ms. Allocated memory is still 250.6MB. Free memory was 192.2MB in the beginning and 190.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 01:55:08,010 INFO L158 Benchmark]: RCFGBuilder took 379.43ms. Allocated memory is still 250.6MB. Free memory was 190.6MB in the beginning and 178.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-04-02 01:55:08,010 INFO L158 Benchmark]: TraceAbstraction took 168928.41ms. Allocated memory was 250.6MB in the beginning and 300.9MB in the end (delta: 50.3MB). Free memory was 177.0MB in the beginning and 265.9MB in the end (delta: -88.9MB). Peak memory consumption was 135.5MB. Max. memory is 8.0GB. [2023-04-02 01:55:08,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 177.2MB. Free memory is still 128.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.50ms. Allocated memory is still 250.6MB. Free memory was 202.7MB in the beginning and 192.2MB in the end (delta: 10.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.17ms. Allocated memory is still 250.6MB. Free memory was 192.2MB in the beginning and 190.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 379.43ms. Allocated memory is still 250.6MB. Free memory was 190.6MB in the beginning and 178.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 168928.41ms. Allocated memory was 250.6MB in the beginning and 300.9MB in the end (delta: 50.3MB). Free memory was 177.0MB in the beginning and 265.9MB in the end (delta: -88.9MB). Peak memory consumption was 135.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=10, counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=5, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=0, counter=1, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=1, counter=2, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=2, counter=3, n=2, x=8, y=19, z=18] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=3, n=3, x=27, y=37, z=24] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=3, counter=4, n=3, x=27, y=37, z=24] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=4, n=4, x=64, y=61, z=30] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=4, counter=5, n=4, x=64, y=61, z=30] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=5, n=5, x=125, y=91, z=36] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=5, counter=6, n=5, x=125, y=91, z=36] [L33] COND FALSE !(counter++<5) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=5, counter=6, n=5, x=125, y=91, z=36] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 168.8s, OverallIterations: 18, TraceHistogramMax: 27, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 135.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 mSolverCounterUnknown, 420 SdHoareTripleChecker+Valid, 47.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 315 mSDsluCounter, 1925 SdHoareTripleChecker+Invalid, 46.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1385 mSDsCounter, 449 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4154 IncrementalHoareTripleChecker+Invalid, 4619 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 449 mSolverCounterUnsat, 540 mSDtfsCounter, 4154 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1948 GetRequests, 1718 SyntacticMatches, 8 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 97.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=17, InterpolantAutomatonStates: 166, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 35 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 28.2s InterpolantComputationTime, 1244 NumberOfCodeBlocks, 1139 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1729 ConstructedInterpolants, 0 QuantifiedInterpolants, 8942 SizeOfPredicates, 47 NumberOfNonLiveVariables, 2572 ConjunctsInSsa, 362 ConjunctsInUnsatCore, 27 InterpolantComputations, 3 PerfectInterpolantSequences, 7455/8788 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-02 01:55:08,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...