/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:06:03,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:06:03,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:06:03,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:06:03,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:06:03,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:06:03,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:06:03,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:06:03,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:06:03,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:06:03,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:06:03,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:06:03,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:06:03,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:06:03,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:06:03,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:06:03,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:06:03,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:06:03,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:06:03,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:06:03,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:06:03,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:06:03,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:06:03,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:06:03,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 17:06:03,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:06:03,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:06:03,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:06:03,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:06:03,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:06:03,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:06:03,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:06:03,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:06:03,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:06:03,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:06:03,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:06:03,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:06:03,979 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:06:03,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:06:03,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:06:03,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:06:03,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:06:03,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:06:03,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:06:03,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:06:03,986 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:06:03,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:06:03,986 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:06:03,988 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:06:03,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:06:03,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:06:03,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:06:03,989 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:06:03,990 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:06:03,990 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:06:03,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:06:03,990 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:06:03,991 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:06:03,991 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:06:03,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:06:03,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:06:03,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:06:03,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:06:03,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:06:03,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:06:03,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:06:03,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:06:03,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:06:04,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:06:04,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:06:04,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:06:04,461 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:06:04,461 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:06:04,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/cohencu.c [2022-10-15 17:06:04,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a9b98bd3/572fb33ef8c348b28edece95056e3677/FLAG869a43ceb [2022-10-15 17:06:05,138 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:06:05,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/cohencu.c [2022-10-15 17:06:05,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a9b98bd3/572fb33ef8c348b28edece95056e3677/FLAG869a43ceb [2022-10-15 17:06:05,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a9b98bd3/572fb33ef8c348b28edece95056e3677 [2022-10-15 17:06:05,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:06:05,501 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:06:05,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:06:05,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:06:05,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:06:05,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b2dff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05, skipping insertion in model container [2022-10-15 17:06:05,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:06:05,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:06:05,791 WARN L230 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/cohencu.c[571,584] [2022-10-15 17:06:05,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:06:05,863 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:06:05,878 WARN L230 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/cohencu.c[571,584] [2022-10-15 17:06:05,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:06:05,909 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:06:05,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05 WrapperNode [2022-10-15 17:06:05,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:06:05,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:06:05,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:06:05,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:06:05,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,956 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2022-10-15 17:06:05,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:06:05,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:06:05,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:06:05,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:06:05,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,983 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:06:05,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:06:05,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:06:05,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:06:05,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (1/1) ... [2022-10-15 17:06:05,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:06:06,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:06,035 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) [2022-10-15 17:06:06,038 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 [2022-10-15 17:06:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:06:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:06:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:06:06,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:06:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-15 17:06:06,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-15 17:06:06,204 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:06:06,206 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:06:06,385 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:06:06,396 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:06:06,398 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:06:06,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:06:06 BoogieIcfgContainer [2022-10-15 17:06:06,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:06:06,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:06:06,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:06:06,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:06:06,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:06:05" (1/3) ... [2022-10-15 17:06:06,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2295a1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:06:06, skipping insertion in model container [2022-10-15 17:06:06,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:06:05" (2/3) ... [2022-10-15 17:06:06,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2295a1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:06:06, skipping insertion in model container [2022-10-15 17:06:06,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:06:06" (3/3) ... [2022-10-15 17:06:06,420 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu.c [2022-10-15 17:06:06,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:06:06,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-15 17:06:06,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:06:06,516 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@66c374ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:06:06,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-15 17:06:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-15 17:06:06,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:06:06,531 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:06,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:06,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:06,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1823043553, now seen corresponding path program 1 times [2022-10-15 17:06:06,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:06,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687612173] [2022-10-15 17:06:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:06,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:06:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:06:06,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:06,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687612173] [2022-10-15 17:06:06,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687612173] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:06:06,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:06:06,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:06:06,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960937267] [2022-10-15 17:06:06,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:06:06,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-15 17:06:06,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-15 17:06:06,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-15 17:06:06,760 INFO L87 Difference]: Start difference. First operand has 26 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:06:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:06,782 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2022-10-15 17:06:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-15 17:06:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:06:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:06,793 INFO L225 Difference]: With dead ends: 26 [2022-10-15 17:06:06,793 INFO L226 Difference]: Without dead ends: 24 [2022-10-15 17:06:06,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-15 17:06:06,800 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:06,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:06:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-15 17:06:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-10-15 17:06:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-15 17:06:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-10-15 17:06:06,848 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 7 [2022-10-15 17:06:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:06,848 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-10-15 17:06:06,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:06:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-10-15 17:06:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:06:06,849 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:06,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:06,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:06:06,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1811663391, now seen corresponding path program 1 times [2022-10-15 17:06:06,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:06,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186323077] [2022-10-15 17:06:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:06,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:06:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:06:07,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:07,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186323077] [2022-10-15 17:06:07,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186323077] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:06:07,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:06:07,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:06:07,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926808738] [2022-10-15 17:06:07,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:06:07,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:06:07,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:07,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:06:07,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:06:07,172 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:06:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:07,293 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2022-10-15 17:06:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:06:07,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:06:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:07,295 INFO L225 Difference]: With dead ends: 28 [2022-10-15 17:06:07,296 INFO L226 Difference]: Without dead ends: 28 [2022-10-15 17:06:07,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:06:07,299 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:07,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 65 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:06:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-15 17:06:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-10-15 17:06:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-15 17:06:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-10-15 17:06:07,315 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 7 [2022-10-15 17:06:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:07,315 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-10-15 17:06:07,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:06:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-10-15 17:06:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 17:06:07,317 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:07,317 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:07,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:06:07,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash -730116346, now seen corresponding path program 1 times [2022-10-15 17:06:07,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:07,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471415323] [2022-10-15 17:06:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:07,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:07,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:07,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975763891] [2022-10-15 17:06:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:07,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:07,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:07,340 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) [2022-10-15 17:06:07,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 17:06:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:06:07,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 17:06:07,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:06:07,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:06:07,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:07,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471415323] [2022-10-15 17:06:07,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:07,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975763891] [2022-10-15 17:06:07,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975763891] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:06:07,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:06:07,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:06:07,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825467304] [2022-10-15 17:06:07,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:06:07,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:06:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:07,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:06:07,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:06:07,519 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:06:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:07,668 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2022-10-15 17:06:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:06:07,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-10-15 17:06:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:07,673 INFO L225 Difference]: With dead ends: 48 [2022-10-15 17:06:07,673 INFO L226 Difference]: Without dead ends: 48 [2022-10-15 17:06:07,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:06:07,676 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:07,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 124 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:06:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-15 17:06:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2022-10-15 17:06:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-15 17:06:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-10-15 17:06:07,692 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 12 [2022-10-15 17:06:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:07,692 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-10-15 17:06:07,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:06:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-10-15 17:06:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 17:06:07,694 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:07,694 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:07,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:07,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:07,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1386554817, now seen corresponding path program 1 times [2022-10-15 17:06:07,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:07,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250137578] [2022-10-15 17:06:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:07,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:07,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:07,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225766478] [2022-10-15 17:06:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:07,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:07,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:07,955 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) [2022-10-15 17:06:07,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 17:06:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:06:08,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 17:06:08,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:06:08,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:06:08,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250137578] [2022-10-15 17:06:08,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225766478] [2022-10-15 17:06:08,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225766478] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:06:08,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:06:08,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:06:08,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258901524] [2022-10-15 17:06:08,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:06:08,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:06:08,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:08,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:06:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:06:08,170 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 17:06:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:08,275 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2022-10-15 17:06:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:06:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-10-15 17:06:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:08,278 INFO L225 Difference]: With dead ends: 52 [2022-10-15 17:06:08,278 INFO L226 Difference]: Without dead ends: 52 [2022-10-15 17:06:08,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:06:08,280 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:08,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 125 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:06:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-10-15 17:06:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-10-15 17:06:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-10-15 17:06:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2022-10-15 17:06:08,295 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 17 [2022-10-15 17:06:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:08,295 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2022-10-15 17:06:08,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 17:06:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2022-10-15 17:06:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-15 17:06:08,297 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:08,297 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:08,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:08,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-15 17:06:08,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:08,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:08,513 INFO L85 PathProgramCache]: Analyzing trace with hash 450593382, now seen corresponding path program 1 times [2022-10-15 17:06:08,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146241451] [2022-10-15 17:06:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:08,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:08,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:08,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668646807] [2022-10-15 17:06:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:08,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:08,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:08,544 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) [2022-10-15 17:06:08,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 17:06:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:06:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 17:06:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-15 17:06:08,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:06:08,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:08,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146241451] [2022-10-15 17:06:08,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:08,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668646807] [2022-10-15 17:06:08,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668646807] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:06:08,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:06:08,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:06:08,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220449439] [2022-10-15 17:06:08,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:06:08,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:06:08,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:08,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:06:08,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:06:08,721 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 17:06:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:08,824 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2022-10-15 17:06:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:06:08,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-10-15 17:06:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:08,827 INFO L225 Difference]: With dead ends: 60 [2022-10-15 17:06:08,827 INFO L226 Difference]: Without dead ends: 60 [2022-10-15 17:06:08,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:06:08,829 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:08,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 108 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:06:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-15 17:06:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-10-15 17:06:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-10-15 17:06:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-10-15 17:06:08,856 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 22 [2022-10-15 17:06:08,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:08,856 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-10-15 17:06:08,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 17:06:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2022-10-15 17:06:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-15 17:06:08,859 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:08,860 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:08,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:09,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:09,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:09,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1159996959, now seen corresponding path program 1 times [2022-10-15 17:06:09,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:09,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967804571] [2022-10-15 17:06:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:09,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:09,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:09,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538035826] [2022-10-15 17:06:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:09,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:09,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:09,098 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) [2022-10-15 17:06:09,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 17:06:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:06:09,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 17:06:09,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-15 17:06:09,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:06:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-15 17:06:09,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:09,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967804571] [2022-10-15 17:06:09,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:09,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538035826] [2022-10-15 17:06:09,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538035826] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:06:09,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:06:09,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-10-15 17:06:09,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586535496] [2022-10-15 17:06:09,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:06:09,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:06:09,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:09,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:06:09,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:06:09,478 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-15 17:06:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:10,155 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-10-15 17:06:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:06:10,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 39 [2022-10-15 17:06:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:10,159 INFO L225 Difference]: With dead ends: 84 [2022-10-15 17:06:10,159 INFO L226 Difference]: Without dead ends: 84 [2022-10-15 17:06:10,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:06:10,161 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 23 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:10,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 124 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 17:06:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-15 17:06:10,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2022-10-15 17:06:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-10-15 17:06:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2022-10-15 17:06:10,174 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 39 [2022-10-15 17:06:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:10,175 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2022-10-15 17:06:10,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-15 17:06:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2022-10-15 17:06:10,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-15 17:06:10,177 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:10,177 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:10,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:10,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:10,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1917422278, now seen corresponding path program 2 times [2022-10-15 17:06:10,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:10,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439748152] [2022-10-15 17:06:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:10,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:10,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:10,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470961853] [2022-10-15 17:06:10,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:06:10,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:10,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:10,413 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:10,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 17:06:10,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:06:10,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:06:10,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 17:06:10,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-15 17:06:10,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:06:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-15 17:06:10,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439748152] [2022-10-15 17:06:10,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470961853] [2022-10-15 17:06:10,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470961853] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:06:10,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:06:10,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-10-15 17:06:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666399004] [2022-10-15 17:06:10,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:06:10,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:06:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:06:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:06:10,692 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-10-15 17:06:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:10,894 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-10-15 17:06:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:06:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 44 [2022-10-15 17:06:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:10,896 INFO L225 Difference]: With dead ends: 88 [2022-10-15 17:06:10,897 INFO L226 Difference]: Without dead ends: 88 [2022-10-15 17:06:10,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:06:10,898 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 17 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:10,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 199 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:06:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-15 17:06:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2022-10-15 17:06:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 40 states have internal predecessors, (40), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-10-15 17:06:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2022-10-15 17:06:10,909 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 44 [2022-10-15 17:06:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:10,910 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2022-10-15 17:06:10,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-10-15 17:06:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2022-10-15 17:06:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-15 17:06:10,912 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:10,913 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:10,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:11,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:11,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:11,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:11,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1979256383, now seen corresponding path program 3 times [2022-10-15 17:06:11,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:11,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892464893] [2022-10-15 17:06:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:11,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:11,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:11,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341482551] [2022-10-15 17:06:11,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:06:11,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:11,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:11,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:11,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 17:06:11,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 17:06:11,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:06:11,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-15 17:06:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-10-15 17:06:11,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:06:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-10-15 17:06:11,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:11,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892464893] [2022-10-15 17:06:11,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341482551] [2022-10-15 17:06:11,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341482551] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:06:11,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:06:11,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-10-15 17:06:11,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072605496] [2022-10-15 17:06:11,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:06:11,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:06:11,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:06:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:06:11,621 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-10-15 17:06:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:12,896 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2022-10-15 17:06:12,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:06:12,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 49 [2022-10-15 17:06:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:12,900 INFO L225 Difference]: With dead ends: 100 [2022-10-15 17:06:12,900 INFO L226 Difference]: Without dead ends: 100 [2022-10-15 17:06:12,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:06:12,901 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 17 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:12,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 116 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-15 17:06:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-10-15 17:06:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2022-10-15 17:06:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.065217391304348) internal successors, (49), 49 states have internal predecessors, (49), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-10-15 17:06:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-10-15 17:06:12,913 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 49 [2022-10-15 17:06:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:12,914 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-10-15 17:06:12,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-10-15 17:06:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-10-15 17:06:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-15 17:06:12,916 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:12,916 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:12,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:13,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:13,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1553296488, now seen corresponding path program 1 times [2022-10-15 17:06:13,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:13,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986321966] [2022-10-15 17:06:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:13,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:13,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:13,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175244560] [2022-10-15 17:06:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:13,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:13,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:13,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:13,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 17:06:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:06:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-15 17:06:13,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-10-15 17:06:13,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:06:13,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:13,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986321966] [2022-10-15 17:06:13,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:13,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175244560] [2022-10-15 17:06:13,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175244560] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:06:13,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:06:13,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:06:13,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327192416] [2022-10-15 17:06:13,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:06:13,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:06:13,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:06:13,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:06:13,251 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-10-15 17:06:13,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:13,278 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2022-10-15 17:06:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:06:13,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 61 [2022-10-15 17:06:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:13,282 INFO L225 Difference]: With dead ends: 84 [2022-10-15 17:06:13,282 INFO L226 Difference]: Without dead ends: 69 [2022-10-15 17:06:13,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:06:13,283 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:13,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:06:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-10-15 17:06:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-10-15 17:06:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.048780487804878) internal successors, (43), 43 states have internal predecessors, (43), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-15 17:06:13,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-10-15 17:06:13,292 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 61 [2022-10-15 17:06:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:13,293 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-10-15 17:06:13,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-10-15 17:06:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-10-15 17:06:13,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-15 17:06:13,295 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:13,295 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:13,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:13,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:13,509 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1268870025, now seen corresponding path program 1 times [2022-10-15 17:06:13,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:13,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343463866] [2022-10-15 17:06:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:13,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:13,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:13,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437610489] [2022-10-15 17:06:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:13,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:13,524 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:13,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 17:06:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:06:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 17:06:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 45 proven. 14 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-15 17:06:13,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:06:14,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:14,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343463866] [2022-10-15 17:06:14,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:14,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437610489] [2022-10-15 17:06:14,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437610489] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:06:14,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:06:14,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-10-15 17:06:14,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557563099] [2022-10-15 17:06:14,748 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 17:06:14,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 17:06:14,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:14,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 17:06:14,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-10-15 17:06:14,749 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-10-15 17:06:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:15,131 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2022-10-15 17:06:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 17:06:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2022-10-15 17:06:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:15,133 INFO L225 Difference]: With dead ends: 87 [2022-10-15 17:06:15,133 INFO L226 Difference]: Without dead ends: 80 [2022-10-15 17:06:15,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-10-15 17:06:15,134 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:15,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 17:06:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-15 17:06:15,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-10-15 17:06:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-10-15 17:06:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-10-15 17:06:15,142 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 65 [2022-10-15 17:06:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:15,143 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-10-15 17:06:15,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-10-15 17:06:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-10-15 17:06:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-10-15 17:06:15,145 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:15,145 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-10-15 17:06:15,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:15,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-15 17:06:15,360 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:15,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1142440481, now seen corresponding path program 4 times [2022-10-15 17:06:15,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:15,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494595261] [2022-10-15 17:06:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:15,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:15,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:15,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615609235] [2022-10-15 17:06:15,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 17:06:15,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:15,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:15,375 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:15,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 17:06:16,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 17:06:16,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:06:16,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-15 17:06:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 68 proven. 67 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-10-15 17:06:16,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:06:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 77 proven. 43 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-10-15 17:06:17,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:17,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494595261] [2022-10-15 17:06:17,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:17,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615609235] [2022-10-15 17:06:17,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615609235] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:06:17,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:06:17,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-10-15 17:06:17,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784178002] [2022-10-15 17:06:17,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:06:17,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-15 17:06:17,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-15 17:06:17,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-10-15 17:06:17,191 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 10 states have internal predecessors, (22), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 8 states have call predecessors, (22), 10 states have call successors, (22) [2022-10-15 17:06:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:17,829 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-10-15 17:06:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:06:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 10 states have internal predecessors, (22), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 8 states have call predecessors, (22), 10 states have call successors, (22) Word has length 71 [2022-10-15 17:06:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:17,831 INFO L225 Difference]: With dead ends: 84 [2022-10-15 17:06:17,831 INFO L226 Difference]: Without dead ends: 84 [2022-10-15 17:06:17,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-10-15 17:06:17,832 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:17,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 17:06:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-15 17:06:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-10-15 17:06:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 18 states have call successors, (18), 14 states have call predecessors, (18), 14 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-10-15 17:06:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-10-15 17:06:17,840 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 71 [2022-10-15 17:06:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:17,841 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-10-15 17:06:17,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 10 states have internal predecessors, (22), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 8 states have call predecessors, (22), 10 states have call successors, (22) [2022-10-15 17:06:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-10-15 17:06:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-15 17:06:17,843 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:17,843 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:17,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:18,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:18,051 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash 12417790, now seen corresponding path program 2 times [2022-10-15 17:06:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:18,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988266185] [2022-10-15 17:06:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:18,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:18,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:18,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632809438] [2022-10-15 17:06:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:06:18,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:18,068 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:18,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 17:06:18,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:06:18,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:06:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 17:06:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-10-15 17:06:18,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:06:18,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988266185] [2022-10-15 17:06:18,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632809438] [2022-10-15 17:06:18,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632809438] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:06:18,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:06:18,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-10-15 17:06:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526853804] [2022-10-15 17:06:18,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 17:06:18,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:06:18,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:18,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:06:18,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:06:18,921 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-10-15 17:06:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:19,184 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2022-10-15 17:06:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:06:19,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 92 [2022-10-15 17:06:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:19,186 INFO L225 Difference]: With dead ends: 106 [2022-10-15 17:06:19,186 INFO L226 Difference]: Without dead ends: 106 [2022-10-15 17:06:19,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:06:19,187 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:19,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 134 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:06:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-10-15 17:06:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-10-15 17:06:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 64 states have internal predecessors, (65), 25 states have call successors, (25), 17 states have call predecessors, (25), 17 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-10-15 17:06:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2022-10-15 17:06:19,196 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 92 [2022-10-15 17:06:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:19,196 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2022-10-15 17:06:19,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-10-15 17:06:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2022-10-15 17:06:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-10-15 17:06:19,198 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:19,198 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:19,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:19,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-15 17:06:19,413 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:19,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:19,414 INFO L85 PathProgramCache]: Analyzing trace with hash -495001593, now seen corresponding path program 1 times [2022-10-15 17:06:19,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:19,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065374122] [2022-10-15 17:06:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:19,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:19,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:19,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135373337] [2022-10-15 17:06:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:19,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:19,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:19,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:19,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 17:06:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:06:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-15 17:06:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-10-15 17:06:19,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:06:19,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:19,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065374122] [2022-10-15 17:06:19,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:19,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135373337] [2022-10-15 17:06:19,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135373337] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:06:19,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:06:19,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-10-15 17:06:19,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705382800] [2022-10-15 17:06:19,976 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 17:06:19,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:06:19,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:06:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:06:19,978 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-10-15 17:06:20,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:20,223 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-10-15 17:06:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:06:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2022-10-15 17:06:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:20,225 INFO L225 Difference]: With dead ends: 114 [2022-10-15 17:06:20,226 INFO L226 Difference]: Without dead ends: 103 [2022-10-15 17:06:20,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:06:20,227 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:20,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 143 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:06:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-10-15 17:06:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-10-15 17:06:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.032258064516129) internal successors, (64), 63 states have internal predecessors, (64), 23 states have call successors, (23), 17 states have call predecessors, (23), 17 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-10-15 17:06:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2022-10-15 17:06:20,234 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 97 [2022-10-15 17:06:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:20,235 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2022-10-15 17:06:20,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-10-15 17:06:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2022-10-15 17:06:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-10-15 17:06:20,237 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:20,237 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:20,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:20,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-15 17:06:20,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:20,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1267091433, now seen corresponding path program 3 times [2022-10-15 17:06:20,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:20,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158735578] [2022-10-15 17:06:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:20,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:20,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:20,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827122970] [2022-10-15 17:06:20,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:06:20,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:20,483 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:20,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-15 17:06:21,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-15 17:06:21,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:06:21,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-15 17:06:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-10-15 17:06:21,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:06:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-10-15 17:06:26,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158735578] [2022-10-15 17:06:26,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:26,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827122970] [2022-10-15 17:06:26,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827122970] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:06:26,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:06:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-10-15 17:06:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552705665] [2022-10-15 17:06:26,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:06:26,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 17:06:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:26,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 17:06:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:06:26,055 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2022-10-15 17:06:31,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-15 17:06:34,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-15 17:06:36,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-15 17:06:38,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-15 17:06:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:39,618 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-10-15 17:06:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 17:06:39,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 119 [2022-10-15 17:06:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:39,620 INFO L225 Difference]: With dead ends: 107 [2022-10-15 17:06:39,620 INFO L226 Difference]: Without dead ends: 105 [2022-10-15 17:06:39,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-10-15 17:06:39,621 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 23 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:39,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 76 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 228 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2022-10-15 17:06:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-10-15 17:06:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-10-15 17:06:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 23 states have call successors, (23), 18 states have call predecessors, (23), 17 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-10-15 17:06:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2022-10-15 17:06:39,628 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 119 [2022-10-15 17:06:39,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:39,628 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2022-10-15 17:06:39,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2022-10-15 17:06:39,629 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2022-10-15 17:06:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-10-15 17:06:39,630 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:39,630 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:39,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:39,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-15 17:06:39,832 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1720314510, now seen corresponding path program 2 times [2022-10-15 17:06:39,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:39,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431857800] [2022-10-15 17:06:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:39,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:39,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:39,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886628034] [2022-10-15 17:06:39,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:06:39,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:39,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:39,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:39,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-15 17:06:39,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:06:39,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:06:39,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-15 17:06:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:06:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 44 proven. 42 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-10-15 17:06:40,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:06:40,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:06:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431857800] [2022-10-15 17:06:40,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:06:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886628034] [2022-10-15 17:06:40,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886628034] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:06:40,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:06:40,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-10-15 17:06:40,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582145482] [2022-10-15 17:06:40,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 17:06:40,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:06:40,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:06:40,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:06:40,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:06:40,452 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-10-15 17:06:40,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:06:40,786 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2022-10-15 17:06:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 17:06:40,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 124 [2022-10-15 17:06:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:06:40,788 INFO L225 Difference]: With dead ends: 133 [2022-10-15 17:06:40,788 INFO L226 Difference]: Without dead ends: 124 [2022-10-15 17:06:40,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:06:40,789 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:06:40,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 175 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 17:06:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-10-15 17:06:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-10-15 17:06:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 28 states have call successors, (28), 21 states have call predecessors, (28), 20 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-10-15 17:06:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2022-10-15 17:06:40,796 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 124 [2022-10-15 17:06:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:06:40,796 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2022-10-15 17:06:40,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-10-15 17:06:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2022-10-15 17:06:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-10-15 17:06:40,798 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:06:40,799 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:06:40,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-15 17:06:41,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 17:06:41,014 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:06:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:06:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash -601652313, now seen corresponding path program 3 times [2022-10-15 17:06:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:06:41,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107098138] [2022-10-15 17:06:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:06:41,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:06:41,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:06:41,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647144596] [2022-10-15 17:06:41,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:06:41,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:06:41,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:06:41,031 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:06:41,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-15 17:06:45,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-15 17:06:45,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:06:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2022-10-15 17:06:45,657 INFO L286 TraceCheckSpWp]: Computing forward predicates...