/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:16:45,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:16:45,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:16:45,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 02:16:45,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 02:16:45,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 02:16:45,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 02:16:45,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 02:16:45,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 02:16:45,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 02:16:45,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 02:16:45,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 02:16:45,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:16:45,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:16:45,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:16:45,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:16:45,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:16:45,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:16:45,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:16:45,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:16:45,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:16:45,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:16:45,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:16:45,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:16:45,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 02:16:45,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:16:45,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:16:45,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:16:45,744 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 02:16:45,769 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:16:45,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:16:45,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:16:45,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:16:45,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:16:45,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:16:45,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:16:45,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:16:45,772 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:16:45,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:16:45,772 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:16:45,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:16:45,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:16:45,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:16:45,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:16:45,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:16:45,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:16:45,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:16:45,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:16:45,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:16:45,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:16:45,776 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:16:45,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:16:45,776 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:16:45,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:16:45,776 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:16:45,776 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:16:45,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:16:45,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:16:46,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:16:46,002 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:16:46,003 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:16:46,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2023-04-02 02:16:47,023 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:16:47,166 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:16:47,166 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2023-04-02 02:16:47,170 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b8f71fb/ea2ab784a8ec4c0a9e48eb4278749c89/FLAGc3d8de401 [2023-04-02 02:16:47,180 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b8f71fb/ea2ab784a8ec4c0a9e48eb4278749c89 [2023-04-02 02:16:47,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:16:47,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:16:47,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:16:47,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:16:47,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:16:47,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a10f5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47, skipping insertion in model container [2023-04-02 02:16:47,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:16:47,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:16:47,340 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c[538,551] [2023-04-02 02:16:47,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:16:47,360 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:16:47,368 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c[538,551] [2023-04-02 02:16:47,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:16:47,388 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:16:47,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47 WrapperNode [2023-04-02 02:16:47,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:16:47,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:16:47,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:16:47,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:16:47,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,408 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:16:47,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:16:47,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:16:47,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:16:47,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (1/1) ... [2023-04-02 02:16:47,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:16:47,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:47,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 02:16:47,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 02:16:47,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:16:47,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:16:47,467 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:16:47,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:16:47,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:16:47,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:16:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:16:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:16:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:16:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:16:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 02:16:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:16:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:16:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:16:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:16:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:16:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:16:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:16:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:16:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:16:47,521 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:16:47,522 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:16:47,705 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:16:47,710 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:16:47,710 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 02:16:47,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:16:47 BoogieIcfgContainer [2023-04-02 02:16:47,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:16:47,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:16:47,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:16:47,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:16:47,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:16:47" (1/3) ... [2023-04-02 02:16:47,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ca382e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:16:47, skipping insertion in model container [2023-04-02 02:16:47,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:16:47" (2/3) ... [2023-04-02 02:16:47,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ca382e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:16:47, skipping insertion in model container [2023-04-02 02:16:47,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:16:47" (3/3) ... [2023-04-02 02:16:47,718 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2023-04-02 02:16:47,729 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:16:47,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:16:47,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:16:47,765 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;@31be557d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:16:47,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:16:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:16:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 02:16:47,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:47,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:47,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:47,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2023-04-02 02:16:47,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:47,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017158349] [2023-04-02 02:16:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:47,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:47,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:47,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017158349] [2023-04-02 02:16:47,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 02:16:47,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380757647] [2023-04-02 02:16:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:47,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:47,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:47,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:47,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 02:16:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:47,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 02:16:47,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:16:47,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:16:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380757647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:47,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:47,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 02:16:47,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569502617] [2023-04-02 02:16:47,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:47,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 02:16:47,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 02:16:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:16:48,022 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:16:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:48,044 INFO L93 Difference]: Finished difference Result 65 states and 99 transitions. [2023-04-02 02:16:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 02:16:48,045 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-02 02:16:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:48,052 INFO L225 Difference]: With dead ends: 65 [2023-04-02 02:16:48,052 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 02:16:48,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:16:48,058 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:48,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 02:16:48,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 02:16:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:16:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-04-02 02:16:48,091 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2023-04-02 02:16:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:48,092 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-04-02 02:16:48,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:16:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-04-02 02:16:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 02:16:48,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:48,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:48,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:48,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 02:16:48,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:48,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2023-04-02 02:16:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:48,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169324924] [2023-04-02 02:16:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:48,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:48,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:16:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:48,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 02:16:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:16:48,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:48,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169324924] [2023-04-02 02:16:48,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169324924] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:48,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:48,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:16:48,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675058571] [2023-04-02 02:16:48,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:48,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:16:48,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:16:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:16:48,519 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:16:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:48,701 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2023-04-02 02:16:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:16:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-02 02:16:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:48,704 INFO L225 Difference]: With dead ends: 47 [2023-04-02 02:16:48,704 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 02:16:48,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:16:48,707 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:48,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 78 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 02:16:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2023-04-02 02:16:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:16:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2023-04-02 02:16:48,716 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2023-04-02 02:16:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:48,716 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2023-04-02 02:16:48,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:16:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2023-04-02 02:16:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 02:16:48,717 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:48,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:48,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 02:16:48,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:48,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2023-04-02 02:16:48,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:48,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409349797] [2023-04-02 02:16:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:48,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:48,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926013508] [2023-04-02 02:16:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:48,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:48,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:48,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 02:16:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:48,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:16:48,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:16:48,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:16:48,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:48,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409349797] [2023-04-02 02:16:48,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:48,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926013508] [2023-04-02 02:16:48,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926013508] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:48,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:48,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 02:16:48,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345963907] [2023-04-02 02:16:48,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:48,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 02:16:48,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:48,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 02:16:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:16:48,852 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:16:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:48,868 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-04-02 02:16:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 02:16:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-04-02 02:16:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:48,869 INFO L225 Difference]: With dead ends: 52 [2023-04-02 02:16:48,869 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 02:16:48,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:16:48,870 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:48,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 02:16:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-02 02:16:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:16:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-04-02 02:16:48,882 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2023-04-02 02:16:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:48,883 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-04-02 02:16:48,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:16:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-04-02 02:16:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 02:16:48,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:48,884 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:48,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 02:16:49,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 02:16:49,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:49,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:49,093 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2023-04-02 02:16:49,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:49,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269895616] [2023-04-02 02:16:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:49,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:49,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:16:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:49,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 02:16:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:49,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-02 02:16:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:16:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269895616] [2023-04-02 02:16:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269895616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:49,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:49,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:16:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240255775] [2023-04-02 02:16:49,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:49,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:16:49,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:49,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:16:49,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:16:49,210 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:16:49,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:49,347 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2023-04-02 02:16:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:16:49,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-04-02 02:16:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:49,349 INFO L225 Difference]: With dead ends: 52 [2023-04-02 02:16:49,349 INFO L226 Difference]: Without dead ends: 50 [2023-04-02 02:16:49,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:16:49,352 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:49,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-02 02:16:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2023-04-02 02:16:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:16:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-04-02 02:16:49,371 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2023-04-02 02:16:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:49,371 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-04-02 02:16:49,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:16:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-04-02 02:16:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 02:16:49,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:49,374 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:49,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 02:16:49,377 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:49,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2023-04-02 02:16:49,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:49,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425107461] [2023-04-02 02:16:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:49,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:49,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399890708] [2023-04-02 02:16:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:49,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:49,395 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:49,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 02:16:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:49,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 02:16:49,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:16:49,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:16:49,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:49,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425107461] [2023-04-02 02:16:49,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:49,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399890708] [2023-04-02 02:16:49,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399890708] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:49,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:49,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-04-02 02:16:49,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771534319] [2023-04-02 02:16:49,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:49,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:16:49,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:49,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:16:49,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:16:49,684 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 02:16:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:49,814 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2023-04-02 02:16:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 02:16:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2023-04-02 02:16:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:49,817 INFO L225 Difference]: With dead ends: 83 [2023-04-02 02:16:49,817 INFO L226 Difference]: Without dead ends: 67 [2023-04-02 02:16:49,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:16:49,818 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:49,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 115 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-02 02:16:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2023-04-02 02:16:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.236842105263158) internal successors, (47), 41 states have internal predecessors, (47), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 02:16:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2023-04-02 02:16:49,840 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 28 [2023-04-02 02:16:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:49,840 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2023-04-02 02:16:49,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 02:16:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2023-04-02 02:16:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 02:16:49,842 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:49,842 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:49,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 02:16:50,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:50,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:50,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2023-04-02 02:16:50,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:50,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202284330] [2023-04-02 02:16:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:50,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:50,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:50,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812011203] [2023-04-02 02:16:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:50,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:50,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:50,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:50,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 02:16:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:50,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:16:50,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 02:16:50,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:16:50,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:50,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202284330] [2023-04-02 02:16:50,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:50,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812011203] [2023-04-02 02:16:50,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812011203] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:50,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:50,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 02:16:50,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875439858] [2023-04-02 02:16:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:50,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:16:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:16:50,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:16:50,156 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 02:16:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:50,185 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2023-04-02 02:16:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 02:16:50,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2023-04-02 02:16:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:50,187 INFO L225 Difference]: With dead ends: 80 [2023-04-02 02:16:50,187 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 02:16:50,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:16:50,188 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:50,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:50,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 02:16:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2023-04-02 02:16:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 47 states have internal predecessors, (52), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 02:16:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2023-04-02 02:16:50,212 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 36 [2023-04-02 02:16:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:50,213 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2023-04-02 02:16:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 02:16:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2023-04-02 02:16:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 02:16:50,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:50,216 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:50,221 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 02:16:50,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:50,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:50,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2023-04-02 02:16:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:50,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29856523] [2023-04-02 02:16:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:50,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:50,428 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:50,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223122240] [2023-04-02 02:16:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:50,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:50,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:50,430 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:50,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 02:16:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:50,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:16:50,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 02:16:50,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 02:16:50,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:50,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29856523] [2023-04-02 02:16:50,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:50,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223122240] [2023-04-02 02:16:50,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223122240] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:50,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:50,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-02 02:16:50,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183186163] [2023-04-02 02:16:50,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:50,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 02:16:50,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:50,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 02:16:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:16:50,749 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 02:16:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:50,890 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2023-04-02 02:16:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:16:50,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 36 [2023-04-02 02:16:50,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:50,891 INFO L225 Difference]: With dead ends: 84 [2023-04-02 02:16:50,891 INFO L226 Difference]: Without dead ends: 76 [2023-04-02 02:16:50,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-04-02 02:16:50,892 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:50,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 129 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-02 02:16:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-04-02 02:16:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.173913043478261) internal successors, (54), 50 states have internal predecessors, (54), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 02:16:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2023-04-02 02:16:50,904 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 36 [2023-04-02 02:16:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:50,904 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2023-04-02 02:16:50,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 02:16:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2023-04-02 02:16:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 02:16:50,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:50,905 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:50,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:51,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:51,110 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:51,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2023-04-02 02:16:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:51,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163058910] [2023-04-02 02:16:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:51,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:51,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161734536] [2023-04-02 02:16:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:51,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:51,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:51,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:51,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 02:16:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:51,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:16:51,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 02:16:51,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 02:16:51,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:51,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163058910] [2023-04-02 02:16:51,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:51,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161734536] [2023-04-02 02:16:51,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161734536] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:51,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:51,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 02:16:51,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721729114] [2023-04-02 02:16:51,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:51,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 02:16:51,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:51,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 02:16:51,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 02:16:51,245 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-02 02:16:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:51,337 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2023-04-02 02:16:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:16:51,337 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2023-04-02 02:16:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:51,339 INFO L225 Difference]: With dead ends: 164 [2023-04-02 02:16:51,339 INFO L226 Difference]: Without dead ends: 134 [2023-04-02 02:16:51,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:16:51,343 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:51,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 130 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-02 02:16:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2023-04-02 02:16:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 87 states have internal predecessors, (94), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-02 02:16:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 145 transitions. [2023-04-02 02:16:51,371 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 145 transitions. Word has length 38 [2023-04-02 02:16:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:51,371 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 145 transitions. [2023-04-02 02:16:51,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-02 02:16:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 145 transitions. [2023-04-02 02:16:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 02:16:51,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:51,377 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:51,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:51,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:51,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:51,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2023-04-02 02:16:51,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:51,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435744413] [2023-04-02 02:16:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:51,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:51,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:51,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830017093] [2023-04-02 02:16:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:51,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:51,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:51,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 02:16:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:51,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:16:51,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:16:51,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 02:16:51,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435744413] [2023-04-02 02:16:51,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830017093] [2023-04-02 02:16:51,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830017093] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:51,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:51,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-04-02 02:16:51,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688581719] [2023-04-02 02:16:51,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:51,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 02:16:51,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 02:16:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:16:51,788 INFO L87 Difference]: Start difference. First operand 128 states and 145 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-02 02:16:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:51,880 INFO L93 Difference]: Finished difference Result 190 states and 219 transitions. [2023-04-02 02:16:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:16:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 54 [2023-04-02 02:16:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:51,882 INFO L225 Difference]: With dead ends: 190 [2023-04-02 02:16:51,882 INFO L226 Difference]: Without dead ends: 174 [2023-04-02 02:16:51,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:16:51,882 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:51,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 190 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:16:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-04-02 02:16:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2023-04-02 02:16:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 118 states have internal predecessors, (127), 35 states have call successors, (35), 24 states have call predecessors, (35), 22 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2023-04-02 02:16:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 192 transitions. [2023-04-02 02:16:51,901 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 192 transitions. Word has length 54 [2023-04-02 02:16:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:51,901 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 192 transitions. [2023-04-02 02:16:51,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-02 02:16:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 192 transitions. [2023-04-02 02:16:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 02:16:51,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:51,902 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:51,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:52,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:52,111 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:52,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:52,111 INFO L85 PathProgramCache]: Analyzing trace with hash 608357748, now seen corresponding path program 1 times [2023-04-02 02:16:52,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:52,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090043825] [2023-04-02 02:16:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:52,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:52,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080394974] [2023-04-02 02:16:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:52,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:52,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:52,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:52,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 02:16:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:52,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 02:16:52,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 02:16:52,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:16:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090043825] [2023-04-02 02:16:52,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080394974] [2023-04-02 02:16:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080394974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:16:52,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:16:52,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 02:16:52,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088050383] [2023-04-02 02:16:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:16:52,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 02:16:52,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 02:16:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:16:52,218 INFO L87 Difference]: Start difference. First operand 169 states and 192 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-02 02:16:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:52,263 INFO L93 Difference]: Finished difference Result 185 states and 210 transitions. [2023-04-02 02:16:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 02:16:52,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2023-04-02 02:16:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:52,265 INFO L225 Difference]: With dead ends: 185 [2023-04-02 02:16:52,265 INFO L226 Difference]: Without dead ends: 170 [2023-04-02 02:16:52,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:16:52,266 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:52,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:16:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-04-02 02:16:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2023-04-02 02:16:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 111 states have (on average 1.135135135135135) internal successors, (126), 116 states have internal predecessors, (126), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-04-02 02:16:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2023-04-02 02:16:52,290 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 65 [2023-04-02 02:16:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:52,291 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2023-04-02 02:16:52,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-02 02:16:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2023-04-02 02:16:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 02:16:52,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:52,292 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:52,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:52,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 02:16:52,498 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:52,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2023-04-02 02:16:52,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:52,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992088900] [2023-04-02 02:16:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:52,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:52,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288176765] [2023-04-02 02:16:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:52,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:52,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:52,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 02:16:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:52,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 02:16:52,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 02:16:52,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 02:16:55,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:55,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992088900] [2023-04-02 02:16:55,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:55,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288176765] [2023-04-02 02:16:55,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288176765] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:55,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:55,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-04-02 02:16:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115526026] [2023-04-02 02:16:55,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:55,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 02:16:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 02:16:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-04-02 02:16:55,229 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-02 02:17:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:17:02,114 INFO L93 Difference]: Finished difference Result 265 states and 323 transitions. [2023-04-02 02:17:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 02:17:02,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 68 [2023-04-02 02:17:02,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:17:02,115 INFO L225 Difference]: With dead ends: 265 [2023-04-02 02:17:02,115 INFO L226 Difference]: Without dead ends: 222 [2023-04-02 02:17:02,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2023-04-02 02:17:02,116 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:17:02,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 317 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-02 02:17:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-04-02 02:17:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 194. [2023-04-02 02:17:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 131 states have (on average 1.1526717557251909) internal successors, (151), 136 states have internal predecessors, (151), 38 states have call successors, (38), 26 states have call predecessors, (38), 24 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-02 02:17:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 223 transitions. [2023-04-02 02:17:02,146 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 223 transitions. Word has length 68 [2023-04-02 02:17:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:17:02,147 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 223 transitions. [2023-04-02 02:17:02,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-02 02:17:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 223 transitions. [2023-04-02 02:17:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 02:17:02,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:17:02,148 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:17:02,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 02:17:02,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:17:02,359 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:17:02,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:17:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2023-04-02 02:17:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:17:02,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575660310] [2023-04-02 02:17:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:17:02,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:17:02,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:17:02,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886996607] [2023-04-02 02:17:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:17:02,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:17:02,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:17:02,367 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:17:02,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 02:17:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:17:02,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 02:17:02,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:17:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 02:17:02,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:17:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 02:17:03,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:17:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575660310] [2023-04-02 02:17:03,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:17:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886996607] [2023-04-02 02:17:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886996607] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:17:03,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:17:03,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-04-02 02:17:03,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100525047] [2023-04-02 02:17:03,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:17:03,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 02:17:03,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:17:03,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 02:17:03,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-04-02 02:17:03,754 INFO L87 Difference]: Start difference. First operand 194 states and 223 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2023-04-02 02:17:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:17:07,349 INFO L93 Difference]: Finished difference Result 288 states and 357 transitions. [2023-04-02 02:17:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 02:17:07,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 79 [2023-04-02 02:17:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:17:07,351 INFO L225 Difference]: With dead ends: 288 [2023-04-02 02:17:07,351 INFO L226 Difference]: Without dead ends: 239 [2023-04-02 02:17:07,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2023-04-02 02:17:07,352 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 70 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:17:07,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 366 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-02 02:17:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-04-02 02:17:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 217. [2023-04-02 02:17:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 150 states have internal predecessors, (167), 45 states have call successors, (45), 27 states have call predecessors, (45), 26 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2023-04-02 02:17:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 254 transitions. [2023-04-02 02:17:07,407 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 254 transitions. Word has length 79 [2023-04-02 02:17:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:17:07,408 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 254 transitions. [2023-04-02 02:17:07,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2023-04-02 02:17:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 254 transitions. [2023-04-02 02:17:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 02:17:07,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:17:07,409 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:17:07,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 02:17:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 02:17:07,613 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:17:07,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:17:07,613 INFO L85 PathProgramCache]: Analyzing trace with hash 437079945, now seen corresponding path program 2 times [2023-04-02 02:17:07,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:17:07,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411818355] [2023-04-02 02:17:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:17:07,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:17:07,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:17:07,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029803135] [2023-04-02 02:17:07,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:17:07,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:17:07,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:17:07,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:17:07,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 02:17:07,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:17:07,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:17:07,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:17:07,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:17:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 02:17:07,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:17:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 02:17:07,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:17:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411818355] [2023-04-02 02:17:07,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:17:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029803135] [2023-04-02 02:17:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029803135] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:17:07,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:17:07,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-04-02 02:17:07,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977271960] [2023-04-02 02:17:07,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:17:07,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:17:07,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:17:07,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:17:07,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:17:07,790 INFO L87 Difference]: Start difference. First operand 217 states and 254 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-04-02 02:17:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:17:07,868 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2023-04-02 02:17:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 02:17:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2023-04-02 02:17:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:17:07,869 INFO L225 Difference]: With dead ends: 249 [2023-04-02 02:17:07,869 INFO L226 Difference]: Without dead ends: 193 [2023-04-02 02:17:07,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:17:07,870 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:17:07,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:17:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-04-02 02:17:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-04-02 02:17:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 132 states have internal predecessors, (147), 41 states have call successors, (41), 25 states have call predecessors, (41), 24 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-02 02:17:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 226 transitions. [2023-04-02 02:17:07,898 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 226 transitions. Word has length 82 [2023-04-02 02:17:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:17:07,898 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 226 transitions. [2023-04-02 02:17:07,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-04-02 02:17:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 226 transitions. [2023-04-02 02:17:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-02 02:17:07,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:17:07,899 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:17:07,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 02:17:08,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 02:17:08,105 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:17:08,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:17:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 1 times [2023-04-02 02:17:08,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:17:08,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020307146] [2023-04-02 02:17:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:17:08,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:17:08,114 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:17:08,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748512600] [2023-04-02 02:17:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:17:08,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:17:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:17:08,115 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:17:08,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 02:17:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:17:08,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 02:17:08,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:17:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 02:17:08,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:17:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-04-02 02:17:08,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:17:08,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020307146] [2023-04-02 02:17:08,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:17:08,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748512600] [2023-04-02 02:17:08,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748512600] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:17:08,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:17:08,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2023-04-02 02:17:08,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925312197] [2023-04-02 02:17:08,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:17:08,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 02:17:08,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:17:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 02:17:08,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 02:17:08,365 INFO L87 Difference]: Start difference. First operand 193 states and 226 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2023-04-02 02:17:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:17:08,478 INFO L93 Difference]: Finished difference Result 270 states and 328 transitions. [2023-04-02 02:17:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 02:17:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) Word has length 97 [2023-04-02 02:17:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:17:08,480 INFO L225 Difference]: With dead ends: 270 [2023-04-02 02:17:08,480 INFO L226 Difference]: Without dead ends: 195 [2023-04-02 02:17:08,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 180 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 02:17:08,481 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:17:08,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 143 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:17:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-04-02 02:17:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-04-02 02:17:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 134 states have internal predecessors, (149), 41 states have call successors, (41), 25 states have call predecessors, (41), 24 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-02 02:17:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 228 transitions. [2023-04-02 02:17:08,517 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 228 transitions. Word has length 97 [2023-04-02 02:17:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:17:08,517 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 228 transitions. [2023-04-02 02:17:08,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2023-04-02 02:17:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 228 transitions. [2023-04-02 02:17:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 02:17:08,518 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:17:08,518 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:17:08,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 02:17:08,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 02:17:08,723 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:17:08,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:17:08,723 INFO L85 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 1 times [2023-04-02 02:17:08,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:17:08,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951341546] [2023-04-02 02:17:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:17:08,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:17:08,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:17:08,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738061489] [2023-04-02 02:17:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:17:08,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:17:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:17:08,739 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:17:08,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 02:17:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:17:08,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 02:17:08,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:17:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 02:17:10,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:17:27,231 WARN L223 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:17:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 02:17:55,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:17:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951341546] [2023-04-02 02:17:55,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:17:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738061489] [2023-04-02 02:17:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738061489] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:17:55,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:17:55,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-04-02 02:17:55,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946785005] [2023-04-02 02:17:55,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:17:55,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 02:17:55,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:17:55,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 02:17:55,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-04-02 02:17:55,571 INFO L87 Difference]: Start difference. First operand 195 states and 228 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 23 states have internal predecessors, (59), 14 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-04-02 02:18:12,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:18:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:18:13,956 INFO L93 Difference]: Finished difference Result 262 states and 325 transitions. [2023-04-02 02:18:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 02:18:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 23 states have internal predecessors, (59), 14 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) Word has length 100 [2023-04-02 02:18:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:18:13,964 INFO L225 Difference]: With dead ends: 262 [2023-04-02 02:18:13,965 INFO L226 Difference]: Without dead ends: 227 [2023-04-02 02:18:13,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-04-02 02:18:13,965 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 53 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-04-02 02:18:13,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 574 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1009 Invalid, 1 Unknown, 0 Unchecked, 13.7s Time] [2023-04-02 02:18:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-04-02 02:18:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 205. [2023-04-02 02:18:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 135 states have (on average 1.1703703703703703) internal successors, (158), 141 states have internal predecessors, (158), 45 states have call successors, (45), 25 states have call predecessors, (45), 24 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2023-04-02 02:18:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 244 transitions. [2023-04-02 02:18:14,012 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 244 transitions. Word has length 100 [2023-04-02 02:18:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:18:14,013 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 244 transitions. [2023-04-02 02:18:14,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 23 states have internal predecessors, (59), 14 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-04-02 02:18:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 244 transitions. [2023-04-02 02:18:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 02:18:14,015 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:18:14,015 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:18:14,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-04-02 02:18:14,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 02:18:14,221 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:18:14,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:18:14,221 INFO L85 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 3 times [2023-04-02 02:18:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:18:14,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489744719] [2023-04-02 02:18:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:18:14,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:18:14,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:18:14,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072055609] [2023-04-02 02:18:14,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:18:14,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:18:14,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:18:14,229 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:18:14,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 02:18:14,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 02:18:14,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:18:14,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 02:18:14,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:18:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 02:18:14,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:19:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 02:19:04,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:19:04,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489744719] [2023-04-02 02:19:04,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:19:04,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072055609] [2023-04-02 02:19:04,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072055609] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:19:04,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:19:04,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-04-02 02:19:04,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384939749] [2023-04-02 02:19:04,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:19:04,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 02:19:04,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:19:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 02:19:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=465, Unknown=1, NotChecked=0, Total=552 [2023-04-02 02:19:04,151 INFO L87 Difference]: Start difference. First operand 205 states and 244 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2023-04-02 02:20:00,943 WARN L223 SmtUtils]: Spent 54.94s on a formula simplification. DAG size of input: 173 DAG size of output: 30 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:20:02,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:05,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:09,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:11,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:13,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:15,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:16,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:17,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:20,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:22,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:24,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:35,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:39,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:41,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:43,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:45,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:49,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:51,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:53,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:54,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:20:57,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:21:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:21:00,610 INFO L93 Difference]: Finished difference Result 259 states and 326 transitions. [2023-04-02 02:21:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 02:21:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) Word has length 100 [2023-04-02 02:21:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:21:00,612 INFO L225 Difference]: With dead ends: 259 [2023-04-02 02:21:00,612 INFO L226 Difference]: Without dead ends: 247 [2023-04-02 02:21:00,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 81.5s TimeCoverageRelationStatistics Valid=165, Invalid=825, Unknown=2, NotChecked=0, Total=992 [2023-04-02 02:21:00,613 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 137 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 116 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.8s IncrementalHoareTripleChecker+Time [2023-04-02 02:21:00,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 380 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 775 Invalid, 10 Unknown, 0 Unchecked, 45.8s Time] [2023-04-02 02:21:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-04-02 02:21:00,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 224. [2023-04-02 02:21:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 147 states have (on average 1.183673469387755) internal successors, (174), 155 states have internal predecessors, (174), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2023-04-02 02:21:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 273 transitions. [2023-04-02 02:21:00,671 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 273 transitions. Word has length 100 [2023-04-02 02:21:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:21:00,671 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 273 transitions. [2023-04-02 02:21:00,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2023-04-02 02:21:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 273 transitions. [2023-04-02 02:21:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 02:21:00,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:21:00,673 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:21:00,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 02:21:00,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:21:00,878 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:21:00,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:21:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash -392782949, now seen corresponding path program 2 times [2023-04-02 02:21:00,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:21:00,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441587095] [2023-04-02 02:21:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:21:00,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:21:00,885 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:21:00,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421760525] [2023-04-02 02:21:00,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:21:00,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:21:00,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:21:00,892 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:21:00,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 02:21:00,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:21:00,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-04-02 02:21:00,980 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 02:21:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 02:21:01,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-04-02 02:21:01,052 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 02:21:01,052 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 02:21:01,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-04-02 02:21:01,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 02:21:01,265 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:21:01,268 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 02:21:01,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 02:21:01 BoogieIcfgContainer [2023-04-02 02:21:01,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 02:21:01,297 INFO L158 Benchmark]: Toolchain (without parser) took 254113.31ms. Allocated memory was 266.3MB in the beginning and 319.8MB in the end (delta: 53.5MB). Free memory was 218.2MB in the beginning and 187.2MB in the end (delta: 31.0MB). Peak memory consumption was 85.6MB. Max. memory is 8.0GB. [2023-04-02 02:21:01,297 INFO L158 Benchmark]: CDTParser took 0.73ms. Allocated memory is still 221.2MB. Free memory is still 172.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 02:21:01,297 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.99ms. Allocated memory is still 266.3MB. Free memory was 217.9MB in the beginning and 207.3MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 02:21:01,297 INFO L158 Benchmark]: Boogie Preprocessor took 19.85ms. Allocated memory is still 266.3MB. Free memory was 207.3MB in the beginning and 205.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 02:21:01,297 INFO L158 Benchmark]: RCFGBuilder took 301.43ms. Allocated memory is still 266.3MB. Free memory was 205.6MB in the beginning and 193.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-04-02 02:21:01,297 INFO L158 Benchmark]: TraceAbstraction took 253582.37ms. Allocated memory was 266.3MB in the beginning and 319.8MB in the end (delta: 53.5MB). Free memory was 192.6MB in the beginning and 187.2MB in the end (delta: 5.4MB). Peak memory consumption was 60.5MB. Max. memory is 8.0GB. [2023-04-02 02:21:01,298 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73ms. Allocated memory is still 221.2MB. Free memory is still 172.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 204.99ms. Allocated memory is still 266.3MB. Free memory was 217.9MB in the beginning and 207.3MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.85ms. Allocated memory is still 266.3MB. Free memory was 207.3MB in the beginning and 205.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 301.43ms. Allocated memory is still 266.3MB. Free memory was 205.6MB in the beginning and 193.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 253582.37ms. Allocated memory was 266.3MB in the beginning and 319.8MB in the end (delta: 53.5MB). Free memory was 192.6MB in the beginning and 187.2MB in the end (delta: 5.4MB). Peak memory consumption was 60.5MB. 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)=11, counter=0] [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [A=-4294967292, B=1, \old(counter)=0, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [A=-4294967292, B=1, \old(counter)=0, counter=0, d=1, p=1, q=0, r=4] [L35] EXPR counter++ VAL [A=-4294967292, B=1, \old(counter)=0, counter++=0, counter=1, d=1, p=1, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 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] [L36] RET __VERIFIER_assert(q == 0) VAL [A=-4294967292, B=1, \old(counter)=0, counter=1, d=1, p=1, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) 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(r == A) VAL [A=-4294967292, B=1, \old(counter)=0, counter=1, d=1, p=1, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) 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(d == B * p) VAL [A=-4294967292, B=1, \old(counter)=0, counter=1, d=1, p=1, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=-4294967292, B=1, \old(counter)=0, counter=1, d=2, p=2, q=0, r=4] [L35] EXPR counter++ VAL [A=-4294967292, B=1, \old(counter)=0, counter++=1, counter=2, d=2, p=2, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 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] [L36] RET __VERIFIER_assert(q == 0) VAL [A=-4294967292, B=1, \old(counter)=0, counter=2, d=2, p=2, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) 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(r == A) VAL [A=-4294967292, B=1, \old(counter)=0, counter=2, d=2, p=2, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) 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(d == B * p) VAL [A=-4294967292, B=1, \old(counter)=0, counter=2, d=2, p=2, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=-4294967292, B=1, \old(counter)=0, counter=2, d=4, p=4, q=0, r=4] [L35] EXPR counter++ VAL [A=-4294967292, B=1, \old(counter)=0, counter++=2, counter=3, d=4, p=4, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 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] [L36] RET __VERIFIER_assert(q == 0) VAL [A=-4294967292, B=1, \old(counter)=0, counter=3, d=4, p=4, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) 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(r == A) VAL [A=-4294967292, B=1, \old(counter)=0, counter=3, d=4, p=4, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) 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(d == B * p) VAL [A=-4294967292, B=1, \old(counter)=0, counter=3, d=4, p=4, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=-4294967292, B=1, \old(counter)=0, counter=3, d=8, p=8, q=0, r=4] [L35] EXPR counter++ VAL [A=-4294967292, B=1, \old(counter)=0, counter++=3, counter=4, d=8, p=8, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 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] [L36] RET __VERIFIER_assert(q == 0) VAL [A=-4294967292, B=1, \old(counter)=0, counter=4, d=8, p=8, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) 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(r == A) VAL [A=-4294967292, B=1, \old(counter)=0, counter=4, d=8, p=8, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) 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(d == B * p) VAL [A=-4294967292, B=1, \old(counter)=0, counter=4, d=8, p=8, q=0, r=4] [L39] COND TRUE !(r >= d) VAL [A=-4294967292, B=1, \old(counter)=0, counter=4, d=8, p=8, q=0, r=4] [L45] EXPR counter++ VAL [A=-4294967292, B=1, \old(counter)=0, counter++=4, counter=5, d=8, p=8, q=0, r=4] [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L46] RET __VERIFIER_assert(A == q*B + r) VAL [A=-4294967292, B=1, \old(counter)=0, counter=5, d=8, p=8, q=0, r=4] [L47] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(d == B*p) VAL [A=-4294967292, B=1, \old(counter)=0, counter=5, d=8, p=8, q=0, r=4] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [A=-4294967292, B=1, \old(counter)=0, counter=5, d=4, p=4, q=0, r=4] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [A=-4294967292, B=1, \old(counter)=0, counter=5, d=4, p=4, q=4, r=0] [L45] EXPR counter++ VAL [A=-4294967292, B=1, \old(counter)=0, counter++=5, counter=6, d=4, p=4, q=4, r=0] [L45] COND FALSE !(counter++<5) [L59] CALL __VERIFIER_assert(A == d*q + r) 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, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 253.5s, OverallIterations: 17, TraceHistogramMax: 15, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 146.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 651 SdHoareTripleChecker+Valid, 65.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 598 mSDsluCounter, 2966 SdHoareTripleChecker+Invalid, 64.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2304 mSDsCounter, 403 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3470 IncrementalHoareTripleChecker+Invalid, 3884 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 403 mSolverCounterUnsat, 662 mSDtfsCounter, 3470 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1568 GetRequests, 1362 SyntacticMatches, 11 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 102.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=224occurred in iteration=16, InterpolantAutomatonStates: 164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 131 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 102.1s InterpolantComputationTime, 984 NumberOfCodeBlocks, 956 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1518 ConstructedInterpolants, 0 QuantifiedInterpolants, 31278 SizeOfPredicates, 39 NumberOfNonLiveVariables, 2227 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 3086/3766 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 02:21:01,392 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...