/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/sqrt1-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:46:34,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:46:34,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:46:34,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 02:46:34,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 02:46:34,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 02:46:34,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 02:46:34,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 02:46:34,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 02:46:34,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 02:46:34,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 02:46:34,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 02:46:34,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:46:34,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:46:34,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:46:34,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:46:34,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:46:34,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:46:34,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:46:34,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:46:34,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:46:34,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:46:34,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:46:34,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:46:34,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 02:46:34,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 02:46:34,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 02:46:34,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 02:46:34,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 02:46:34,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 02:46:34,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 02:46:34,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 02:46:34,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 02:46:34,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:46:34,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:46:34,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:46:34,899 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 02:46:34,923 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:46:34,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:46:34,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:46:34,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:46:34,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:46:34,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:46:34,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:46:34,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:46:34,925 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:46:34,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:46:34,926 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:46:34,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:46:34,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:46:34,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:46:34,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:46:34,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:46:34,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:46:34,927 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:46:34,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:46:34,927 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:46:34,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:46:34,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:46:34,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:46:34,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:46:34,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:46:34,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:46:34,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:46:34,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:46:34,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:46:34,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:46:34,928 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:46:34,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:46:34,929 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:46:34,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:46:34,929 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:46:34,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:46:35,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:46:35,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:46:35,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:46:35,153 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:46:35,154 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:46:35,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2023-04-02 02:46:36,251 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:46:36,415 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:46:36,417 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2023-04-02 02:46:36,422 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8f7ee5d9/388f22c416f242abb97e9de05e4a83dc/FLAGd6aa39185 [2023-04-02 02:46:36,437 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8f7ee5d9/388f22c416f242abb97e9de05e4a83dc [2023-04-02 02:46:36,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:46:36,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:46:36,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:46:36,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:46:36,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:46:36,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5e5d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36, skipping insertion in model container [2023-04-02 02:46:36,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:46:36,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:46:36,586 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/sqrt1-ll_unwindbound100.c[520,533] [2023-04-02 02:46:36,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:46:36,611 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:46:36,621 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/sqrt1-ll_unwindbound100.c[520,533] [2023-04-02 02:46:36,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:46:36,646 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:46:36,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36 WrapperNode [2023-04-02 02:46:36,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:46:36,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:46:36,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:46:36,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:46:36,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,674 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:46:36,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:46:36,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:46:36,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:46:36,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (1/1) ... [2023-04-02 02:46:36,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:46:36,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:46:36,703 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 02:46:36,710 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 02:46:36,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:46:36,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:46:36,733 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:46:36,733 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:46:36,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:46:36,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:46:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:46:36,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:46:36,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:46:36,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:46:36,788 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:46:36,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:46:36,883 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:46:36,887 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:46:36,888 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 02:46:36,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:46:36 BoogieIcfgContainer [2023-04-02 02:46:36,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:46:36,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:46:36,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:46:36,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:46:36,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:46:36" (1/3) ... [2023-04-02 02:46:36,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8d3d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:46:36, skipping insertion in model container [2023-04-02 02:46:36,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:46:36" (2/3) ... [2023-04-02 02:46:36,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8d3d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:46:36, skipping insertion in model container [2023-04-02 02:46:36,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:46:36" (3/3) ... [2023-04-02 02:46:36,896 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound100.c [2023-04-02 02:46:36,909 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:46:36,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:46:36,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:46:36,964 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;@7e0796f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:46:36,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:46:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:46:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 02:46:36,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:46:36,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:46:36,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:46:36,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:46:36,994 INFO L85 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2023-04-02 02:46:37,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:46:37,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199719165] [2023-04-02 02:46:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:37,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:46:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:46:37,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:46:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:46:37,191 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 02:46:37,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:46:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199719165] [2023-04-02 02:46:37,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199719165] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:46:37,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:46:37,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 02:46:37,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773153807] [2023-04-02 02:46:37,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:46:37,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 02:46:37,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:46:37,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 02:46:37,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 02:46:37,219 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:46:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:46:37,336 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2023-04-02 02:46:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 02:46:37,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 02:46:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:46:37,347 INFO L225 Difference]: With dead ends: 47 [2023-04-02 02:46:37,348 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 02:46:37,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 02:46:37,356 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:46:37,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:46:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 02:46:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-04-02 02:46:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 02:46:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-04-02 02:46:37,396 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2023-04-02 02:46:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:46:37,397 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-04-02 02:46:37,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:46:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-04-02 02:46:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 02:46:37,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:46:37,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:46:37,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 02:46:37,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:46:37,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:46:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2023-04-02 02:46:37,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:46:37,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578781510] [2023-04-02 02:46:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:37,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:46:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:46:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:46:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:46:37,541 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 02:46:37,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:46:37,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578781510] [2023-04-02 02:46:37,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578781510] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:46:37,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:46:37,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 02:46:37,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651756673] [2023-04-02 02:46:37,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:46:37,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:46:37,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:46:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:46:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:46:37,544 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:46:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:46:37,655 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-04-02 02:46:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:46:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 02:46:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:46:37,657 INFO L225 Difference]: With dead ends: 32 [2023-04-02 02:46:37,657 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 02:46:37,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:46:37,659 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:46:37,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 43 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:46:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 02:46:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 02:46:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 02:46:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-04-02 02:46:37,665 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2023-04-02 02:46:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:46:37,665 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-04-02 02:46:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:46:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-04-02 02:46:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 02:46:37,666 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:46:37,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:46:37,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 02:46:37,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:46:37,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:46:37,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2023-04-02 02:46:37,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:46:37,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119038107] [2023-04-02 02:46:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:37,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:46:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:46:37,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:46:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:46:37,813 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 02:46:37,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:46:37,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119038107] [2023-04-02 02:46:37,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119038107] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:46:37,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:46:37,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:46:37,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250527343] [2023-04-02 02:46:37,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:46:37,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:46:37,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:46:37,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:46:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:46:37,816 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:46:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:46:37,983 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2023-04-02 02:46:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:46:37,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 02:46:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:46:37,985 INFO L225 Difference]: With dead ends: 36 [2023-04-02 02:46:37,986 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 02:46:37,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:46:37,993 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:46:37,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:46:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 02:46:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-04-02 02:46:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:46:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-04-02 02:46:38,015 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2023-04-02 02:46:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:46:38,015 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-04-02 02:46:38,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:46:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-04-02 02:46:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 02:46:38,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:46:38,016 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:46:38,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 02:46:38,017 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:46:38,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:46:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2023-04-02 02:46:38,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:46:38,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220215532] [2023-04-02 02:46:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:46:38,040 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:46:38,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958615793] [2023-04-02 02:46:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:38,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:46:38,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:46:38,042 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 02:46:38,044 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 02:46:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:46:38,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:46:38,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:46:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:46:38,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:46:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:46:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:46:38,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220215532] [2023-04-02 02:46:38,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:46:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958615793] [2023-04-02 02:46:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958615793] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:46:38,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:46:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-04-02 02:46:38,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828489254] [2023-04-02 02:46:38,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:46:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:46:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:46:38,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:46:38,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:46:38,336 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 02:46:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:46:38,456 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2023-04-02 02:46:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 02:46:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 17 [2023-04-02 02:46:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:46:38,459 INFO L225 Difference]: With dead ends: 44 [2023-04-02 02:46:38,459 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 02:46:38,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:46:38,465 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:46:38,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 64 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:46:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 02:46:38,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-04-02 02:46:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 02:46:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-04-02 02:46:38,483 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2023-04-02 02:46:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:46:38,484 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-04-02 02:46:38,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 02:46:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-04-02 02:46:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 02:46:38,485 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:46:38,485 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] [2023-04-02 02:46:38,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 02:46:38,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:46:38,692 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:46:38,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:46:38,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2023-04-02 02:46:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:46:38,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905730211] [2023-04-02 02:46:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:38,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:46:38,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:46:38,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676649752] [2023-04-02 02:46:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:38,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:46:38,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:46:38,717 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 02:46:38,720 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 02:46:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:46:38,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:46:38,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:46:38,825 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 02:46:38,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:46:38,872 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 02:46:38,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:46:38,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905730211] [2023-04-02 02:46:38,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:46:38,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676649752] [2023-04-02 02:46:38,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676649752] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:46:38,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:46:38,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 02:46:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785057273] [2023-04-02 02:46:38,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:46:38,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 02:46:38,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:46:38,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 02:46:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 02:46:38,876 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 02:46:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:46:38,982 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2023-04-02 02:46:38,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:46:38,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2023-04-02 02:46:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:46:38,986 INFO L225 Difference]: With dead ends: 92 [2023-04-02 02:46:38,986 INFO L226 Difference]: Without dead ends: 79 [2023-04-02 02:46:38,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 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 02:46:38,987 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:46:38,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 111 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:46:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-02 02:46:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2023-04-02 02:46:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-02 02:46:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2023-04-02 02:46:39,010 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 30 [2023-04-02 02:46:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:46:39,011 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2023-04-02 02:46:39,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 02:46:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2023-04-02 02:46:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 02:46:39,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:46:39,012 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:46:39,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 02:46:39,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:46:39,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:46:39,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:46:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1324865054, now seen corresponding path program 1 times [2023-04-02 02:46:39,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:46:39,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111697750] [2023-04-02 02:46:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:39,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:46:39,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:46:39,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777052219] [2023-04-02 02:46:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:39,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:46:39,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:46:39,253 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 02:46:39,256 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 02:46:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:46:39,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 02:46:39,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:46:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 02:46:39,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:46:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:46:39,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:46:39,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111697750] [2023-04-02 02:46:39,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:46:39,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777052219] [2023-04-02 02:46:39,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777052219] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:46:39,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:46:39,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-02 02:46:39,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236676600] [2023-04-02 02:46:39,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:46:39,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:46:39,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:46:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:46:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:46:39,402 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 02:46:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:46:39,445 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2023-04-02 02:46:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:46:39,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-04-02 02:46:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:46:39,446 INFO L225 Difference]: With dead ends: 89 [2023-04-02 02:46:39,447 INFO L226 Difference]: Without dead ends: 87 [2023-04-02 02:46:39,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:46:39,448 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:46:39,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:46:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-02 02:46:39,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-04-02 02:46:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 54 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-02 02:46:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2023-04-02 02:46:39,473 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 30 [2023-04-02 02:46:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:46:39,473 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2023-04-02 02:46:39,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 02:46:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2023-04-02 02:46:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 02:46:39,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:46:39,474 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:46:39,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 02:46:39,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:46:39,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:46:39,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:46:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1183106562, now seen corresponding path program 2 times [2023-04-02 02:46:39,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:46:39,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487110081] [2023-04-02 02:46:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:46:39,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:46:39,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:46:39,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948286442] [2023-04-02 02:46:39,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:46:39,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:46:39,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:46:39,690 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 02:46:39,692 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 02:46:39,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:46:39,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:46:39,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 02:46:39,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:46:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 02:46:39,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:46:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-02 02:46:40,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:46:40,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487110081] [2023-04-02 02:46:40,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:46:40,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948286442] [2023-04-02 02:46:40,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948286442] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:46:40,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:46:40,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-04-02 02:46:40,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524505349] [2023-04-02 02:46:40,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:46:40,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 02:46:40,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:46:40,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 02:46:40,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:46:40,230 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 02:46:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:46:40,430 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2023-04-02 02:46:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 02:46:40,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 40 [2023-04-02 02:46:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:46:40,431 INFO L225 Difference]: With dead ends: 87 [2023-04-02 02:46:40,432 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 02:46:40,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-04-02 02:46:40,433 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:46:40,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 63 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 02:46:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 02:46:40,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 02:46:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 02:46:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 02:46:40,434 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2023-04-02 02:46:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:46:40,434 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 02:46:40,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 02:46:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 02:46:40,434 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 02:46:40,436 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 02:46:40,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 02:46:40,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:46:40,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 02:46:41,336 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2023-04-02 02:46:41,336 INFO L899 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2023-04-02 02:46:41,336 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 5) no Hoare annotation was computed. [2023-04-02 02:46:41,337 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(lines 8 10) no Hoare annotation was computed. [2023-04-02 02:46:41,337 INFO L899 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2023-04-02 02:46:41,337 INFO L899 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2023-04-02 02:46:41,337 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2023-04-02 02:46:41,337 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2023-04-02 02:46:41,337 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (or (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2023-04-02 02:46:41,337 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2023-04-02 02:46:41,337 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2023-04-02 02:46:41,337 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-04-02 02:46:41,337 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2023-04-02 02:46:41,338 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (or (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2023-04-02 02:46:41,338 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 21 49) the Hoare annotation is: (or (= ~counter~0 0) (not (= |old(~counter~0)| 0))) [2023-04-02 02:46:41,338 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (or (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2023-04-02 02:46:41,338 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2023-04-02 02:46:41,338 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2023-04-02 02:46:41,338 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2023-04-02 02:46:41,338 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2023-04-02 02:46:41,338 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2023-04-02 02:46:41,338 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-02 02:46:41,338 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 02:46:41,339 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 02:46:41,339 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2023-04-02 02:46:41,339 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 02:46:41,339 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 02:46:41,339 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-04-02 02:46:41,339 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-04-02 02:46:41,339 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-04-02 02:46:41,339 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-04-02 02:46:41,339 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-04-02 02:46:41,339 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-04-02 02:46:41,341 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-04-02 02:46:41,343 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 02:46:41,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 02:46:41 BoogieIcfgContainer [2023-04-02 02:46:41,352 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 02:46:41,353 INFO L158 Benchmark]: Toolchain (without parser) took 4912.22ms. Allocated memory is still 263.2MB. Free memory was 216.3MB in the beginning and 181.8MB in the end (delta: 34.6MB). Peak memory consumption was 35.8MB. Max. memory is 8.0GB. [2023-04-02 02:46:41,353 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 178.3MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 02:46:41,353 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.94ms. Allocated memory is still 263.2MB. Free memory was 216.0MB in the beginning and 205.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 02:46:41,353 INFO L158 Benchmark]: Boogie Preprocessor took 31.78ms. Allocated memory is still 263.2MB. Free memory was 205.7MB in the beginning and 204.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 02:46:41,353 INFO L158 Benchmark]: RCFGBuilder took 210.05ms. Allocated memory is still 263.2MB. Free memory was 204.0MB in the beginning and 193.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 02:46:41,353 INFO L158 Benchmark]: TraceAbstraction took 4461.06ms. Allocated memory is still 263.2MB. Free memory was 192.5MB in the beginning and 181.8MB in the end (delta: 10.7MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. [2023-04-02 02:46:41,354 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 178.3MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.94ms. Allocated memory is still 263.2MB. Free memory was 216.0MB in the beginning and 205.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.78ms. Allocated memory is still 263.2MB. Free memory was 205.7MB in the beginning and 204.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 210.05ms. Allocated memory is still 263.2MB. Free memory was 204.0MB in the beginning and 193.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 4461.06ms. Allocated memory is still 263.2MB. Free memory was 192.5MB in the beginning and 181.8MB in the end (delta: 10.7MB). Peak memory consumption was 11.7MB. 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 7, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 144 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 119 mSDsluCounter, 415 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 267 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 410 IncrementalHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 148 mSDtfsCounter, 410 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=6, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 47 PreInvPairs, 76 NumberOfFragments, 198 HoareAnnotationTreeSize, 47 FomulaSimplifications, 263 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 634 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 972 SizeOfPredicates, 10 NumberOfNonLiveVariables, 428 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 164/196 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (t * 2 + t * t + 1 == s * 4 && t == a * 2 + 1) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! [2023-04-02 02:46:41,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...