/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/ps4-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:07:56,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:07:56,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:07:56,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:07:56,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:07:56,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:07:56,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:07:56,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:07:56,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:07:57,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:07:57,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:07:57,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:07:57,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:07:57,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:07:57,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:07:57,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:07:57,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:07:57,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:07:57,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:07:57,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:07:57,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:07:57,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:07:57,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:07:57,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:07:57,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:07:57,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:07:57,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:07:57,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:07:57,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:07:57,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:07:57,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:07:57,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:07:57,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:07:57,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:07:57,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:07:57,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:07:57,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:07:57,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:07:57,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:07:57,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:07:57,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:07:57,035 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 17:07:57,067 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:07:57,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:07:57,068 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:07:57,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:07:57,069 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:07:57,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:07:57,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:07:57,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:07:57,070 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:07:57,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:07:57,071 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:07:57,071 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:07:57,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:07:57,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:07:57,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:07:57,072 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:07:57,072 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:07:57,072 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:07:57,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:07:57,073 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:07:57,073 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:07:57,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:07:57,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:07:57,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:07:57,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:07:57,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:07:57,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:07:57,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:07:57,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:07:57,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:07:57,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:07:57,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:07:57,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:07:57,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:07:57,444 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:07:57,444 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:07:57,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/ps4-ll.c [2022-10-15 17:07:57,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27f44dec9/e4143431fa5a44c1b581da060f0bb120/FLAG63be146e9 [2022-10-15 17:07:58,180 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:07:58,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps4-ll.c [2022-10-15 17:07:58,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27f44dec9/e4143431fa5a44c1b581da060f0bb120/FLAG63be146e9 [2022-10-15 17:07:58,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27f44dec9/e4143431fa5a44c1b581da060f0bb120 [2022-10-15 17:07:58,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:07:58,560 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:07:58,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:07:58,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:07:58,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:07:58,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bfebe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58, skipping insertion in model container [2022-10-15 17:07:58,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:07:58,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:07:58,744 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/ps4-ll.c[458,471] [2022-10-15 17:07:58,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:07:58,774 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:07:58,790 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/ps4-ll.c[458,471] [2022-10-15 17:07:58,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:07:58,813 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:07:58,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58 WrapperNode [2022-10-15 17:07:58,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:07:58,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:07:58,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:07:58,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:07:58,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,853 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2022-10-15 17:07:58,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:07:58,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:07:58,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:07:58,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:07:58,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,875 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:07:58,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:07:58,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:07:58,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:07:58,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (1/1) ... [2022-10-15 17:07:58,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:07:58,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:07:58,917 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 17:07:58,924 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 17:07:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:07:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:07:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:07:58,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:07:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-15 17:07:58,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-15 17:07:59,092 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:07:59,094 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:07:59,312 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:07:59,329 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:07:59,329 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:07:59,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:07:59 BoogieIcfgContainer [2022-10-15 17:07:59,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:07:59,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:07:59,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:07:59,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:07:59,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:07:58" (1/3) ... [2022-10-15 17:07:59,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35af55b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:07:59, skipping insertion in model container [2022-10-15 17:07:59,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:07:58" (2/3) ... [2022-10-15 17:07:59,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35af55b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:07:59, skipping insertion in model container [2022-10-15 17:07:59,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:07:59" (3/3) ... [2022-10-15 17:07:59,355 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll.c [2022-10-15 17:07:59,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:07:59,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-15 17:07:59,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:07:59,529 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;@5f5b93d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:07:59,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-15 17:07:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:07:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:07:59,566 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:07:59,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:07:59,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:07:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:07:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1818864869, now seen corresponding path program 1 times [2022-10-15 17:07:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:07:59,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14232727] [2022-10-15 17:07:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:07:59,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:07:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:07:59,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:07:59,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14232727] [2022-10-15 17:07:59,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-15 17:07:59,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880225640] [2022-10-15 17:07:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:07:59,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:07:59,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:07:59,793 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 17:07:59,815 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 17:07:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:07:59,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-15 17:07:59,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:07:59,916 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 17:07:59,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:07:59,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880225640] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:07:59,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:07:59,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:07:59,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396840352] [2022-10-15 17:07:59,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:07:59,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-15 17:07:59,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:07:59,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-15 17:07:59,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-15 17:07:59,969 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 17:07:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:07:59,986 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-10-15 17:07:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-15 17:07:59,988 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 17:07:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:07:59,996 INFO L225 Difference]: With dead ends: 18 [2022-10-15 17:07:59,997 INFO L226 Difference]: Without dead ends: 16 [2022-10-15 17:07:59,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 17:08:00,003 INFO L413 NwaCegarLoop]: 20 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, 20 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 17:08:00,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:08:00,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-10-15 17:08:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-10-15 17:08:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:08:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-10-15 17:08:00,047 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 7 [2022-10-15 17:08:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:08:00,048 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-10-15 17:08:00,048 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 17:08:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-10-15 17:08:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:08:00,049 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:08:00,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:08:00,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 17:08:00,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-15 17:08:00,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:08:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:08:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1811417119, now seen corresponding path program 1 times [2022-10-15 17:08:00,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:08:00,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172308035] [2022-10-15 17:08:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:00,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:08:00,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:08:00,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500963995] [2022-10-15 17:08:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:00,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:08:00,289 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 17:08:00,291 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 17:08:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:08:00,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 17:08:00,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:08:00,416 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 17:08:00,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:08:00,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:08:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172308035] [2022-10-15 17:08:00,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:08:00,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500963995] [2022-10-15 17:08:00,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500963995] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:08:00,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:08:00,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:08:00,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685898823] [2022-10-15 17:08:00,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:08:00,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:08:00,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:08:00,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:08:00,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:08:00,422 INFO L87 Difference]: Start difference. First operand 16 states and 18 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 17:08:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:08:00,481 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-10-15 17:08:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:08:00,482 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 17:08:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:08:00,483 INFO L225 Difference]: With dead ends: 28 [2022-10-15 17:08:00,483 INFO L226 Difference]: Without dead ends: 28 [2022-10-15 17:08:00,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:08:00,485 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:08:00,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:08:00,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-15 17:08:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-10-15 17:08:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:08:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-10-15 17:08:00,496 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2022-10-15 17:08:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:08:00,497 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-10-15 17:08:00,497 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 17:08:00,497 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-10-15 17:08:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 17:08:00,498 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:08:00,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:08:00,533 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 17:08:00,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-10-15 17:08:00,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:08:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:08:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1726463718, now seen corresponding path program 1 times [2022-10-15 17:08:00,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:08:00,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526855590] [2022-10-15 17:08:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:00,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:08:00,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:08:00,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421989133] [2022-10-15 17:08:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:00,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:00,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:08:00,742 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 17:08:00,750 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 17:08:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:08:00,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 17:08:00,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:08:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:08:00,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:08:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:08:01,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:08:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526855590] [2022-10-15 17:08:01,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:08:01,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421989133] [2022-10-15 17:08:01,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421989133] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-15 17:08:01,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:08:01,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-10-15 17:08:01,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283744388] [2022-10-15 17:08:01,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:08:01,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:08:01,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:08:01,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:08:01,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:08:01,402 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 17:08:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:08:01,515 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-10-15 17:08:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:08:01,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2022-10-15 17:08:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:08:01,519 INFO L225 Difference]: With dead ends: 33 [2022-10-15 17:08:01,519 INFO L226 Difference]: Without dead ends: 33 [2022-10-15 17:08:01,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:08:01,521 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:08:01,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:08:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-15 17:08:01,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-15 17:08:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:08:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-10-15 17:08:01,531 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 14 [2022-10-15 17:08:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:08:01,532 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-10-15 17:08:01,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 17:08:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-10-15 17:08:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 17:08:01,533 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:08:01,533 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:08:01,571 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 17:08:01,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:01,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:08:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:08:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1869424682, now seen corresponding path program 1 times [2022-10-15 17:08:01,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:08:01,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203249215] [2022-10-15 17:08:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:01,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:08:01,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:08:01,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643506617] [2022-10-15 17:08:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:01,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:01,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:08:01,777 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 17:08:01,779 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 17:08:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:08:01,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-15 17:08:01,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:08:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 17:08:02,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:08:09,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:08:09,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203249215] [2022-10-15 17:08:09,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:08:09,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643506617] [2022-10-15 17:08:09,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643506617] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:08:09,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:08:09,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-10-15 17:08:09,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536335192] [2022-10-15 17:08:09,816 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 17:08:09,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 17:08:09,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:08:09,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 17:08:09,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-10-15 17:08:09,818 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:08:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:08:10,051 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-10-15 17:08:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 17:08:10,052 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-10-15 17:08:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:08:10,053 INFO L225 Difference]: With dead ends: 48 [2022-10-15 17:08:10,053 INFO L226 Difference]: Without dead ends: 48 [2022-10-15 17:08:10,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-10-15 17:08:10,056 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:08:10,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 79 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:08:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-15 17:08:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-10-15 17:08:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-15 17:08:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-10-15 17:08:10,066 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 20 [2022-10-15 17:08:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:08:10,067 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-10-15 17:08:10,067 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:08:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-10-15 17:08:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 17:08:10,068 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:08:10,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:08:10,110 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 17:08:10,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:10,284 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:08:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:08:10,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1152965356, now seen corresponding path program 1 times [2022-10-15 17:08:10,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:08:10,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550729151] [2022-10-15 17:08:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:10,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:08:10,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:08:10,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115117551] [2022-10-15 17:08:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:10,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:10,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:08:10,308 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 17:08:10,309 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 17:08:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:08:10,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-15 17:08:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:08:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-15 17:08:10,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:08:10,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:08:10,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550729151] [2022-10-15 17:08:10,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:08:10,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115117551] [2022-10-15 17:08:10,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115117551] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:08:10,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:08:10,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:08:10,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813957405] [2022-10-15 17:08:10,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:08:10,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:08:10,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:08:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:08:10,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:08:10,378 INFO L87 Difference]: Start difference. First operand 41 states and 46 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 17:08:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:08:10,391 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-10-15 17:08:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:08:10,393 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2022-10-15 17:08:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:08:10,394 INFO L225 Difference]: With dead ends: 40 [2022-10-15 17:08:10,394 INFO L226 Difference]: Without dead ends: 24 [2022-10-15 17:08:10,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 17:08:10,397 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:08:10,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:08:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-15 17:08:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-10-15 17:08:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:08:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-10-15 17:08:10,412 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2022-10-15 17:08:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:08:10,412 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-10-15 17:08:10,412 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 17:08:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-10-15 17:08:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 17:08:10,414 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:08:10,414 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 17:08:10,453 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 17:08:10,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:10,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:08:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:08:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1342026053, now seen corresponding path program 2 times [2022-10-15 17:08:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:08:10,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664188975] [2022-10-15 17:08:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:10,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:08:10,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:08:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222492251] [2022-10-15 17:08:10,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:08:10,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:10,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:08:10,631 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 17:08:10,651 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 17:08:10,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:08:10,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:08:10,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 17:08:10,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:08:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-15 17:08:10,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:08:11,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:08:11,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664188975] [2022-10-15 17:08:11,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:08:11,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222492251] [2022-10-15 17:08:11,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222492251] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:08:11,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:08:11,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-10-15 17:08:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495326815] [2022-10-15 17:08:11,392 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 17:08:11,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:08:11,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:08:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:08:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:08:11,393 INFO L87 Difference]: Start difference. First operand 24 states and 25 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:08:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:08:11,504 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-10-15 17:08:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:08:11,505 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-10-15 17:08:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:08:11,506 INFO L225 Difference]: With dead ends: 30 [2022-10-15 17:08:11,506 INFO L226 Difference]: Without dead ends: 27 [2022-10-15 17:08:11,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:08:11,510 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:08:11,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:08:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-15 17:08:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-10-15 17:08:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 17:08:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-10-15 17:08:11,518 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2022-10-15 17:08:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:08:11,522 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-10-15 17:08:11,522 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:08:11,522 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-10-15 17:08:11,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-15 17:08:11,523 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:08:11,524 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-10-15 17:08:11,555 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 17:08:11,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:11,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:08:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:08:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash -590398410, now seen corresponding path program 3 times [2022-10-15 17:08:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:08:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120164368] [2022-10-15 17:08:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:08:11,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:08:11,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295966978] [2022-10-15 17:08:11,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:08:11,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:11,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:08:11,741 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 17:08:11,758 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 17:08:11,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-15 17:08:11,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:08:11,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-15 17:08:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:08:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-15 17:08:11,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:08:12,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:08:12,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120164368] [2022-10-15 17:08:12,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:08:12,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295966978] [2022-10-15 17:08:12,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295966978] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:08:12,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:08:12,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-10-15 17:08:12,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039311778] [2022-10-15 17:08:12,557 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 17:08:12,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:08:12,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:08:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:08:12,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:08:12,558 INFO L87 Difference]: Start difference. First operand 27 states and 29 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 17:08:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:08:12,701 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-10-15 17:08:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 17:08:12,701 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-10-15 17:08:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:08:12,702 INFO L225 Difference]: With dead ends: 33 [2022-10-15 17:08:12,703 INFO L226 Difference]: Without dead ends: 30 [2022-10-15 17:08:12,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:08:12,704 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:08:12,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:08:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-15 17:08:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-10-15 17:08:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 17:08:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-10-15 17:08:12,710 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 34 [2022-10-15 17:08:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:08:12,711 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-10-15 17:08:12,711 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 17:08:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-10-15 17:08:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-15 17:08:12,712 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:08:12,713 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2022-10-15 17:08:12,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-15 17:08:12,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:12,918 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:08:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:08:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1379810907, now seen corresponding path program 4 times [2022-10-15 17:08:12,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:08:12,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561864181] [2022-10-15 17:08:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:08:12,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:08:12,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396330072] [2022-10-15 17:08:12,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 17:08:12,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:08:12,934 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 17:08:12,957 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 17:08:13,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 17:08:13,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:08:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 17:08:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:08:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-15 17:08:13,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:08:13,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:08:13,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561864181] [2022-10-15 17:08:13,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:08:13,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396330072] [2022-10-15 17:08:13,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396330072] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:08:13,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:08:13,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-10-15 17:08:13,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364611625] [2022-10-15 17:08:13,371 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 17:08:13,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 17:08:13,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:08:13,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 17:08:13,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:08:13,372 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 17:08:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:08:13,522 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-10-15 17:08:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 17:08:13,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 41 [2022-10-15 17:08:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:08:13,524 INFO L225 Difference]: With dead ends: 36 [2022-10-15 17:08:13,524 INFO L226 Difference]: Without dead ends: 33 [2022-10-15 17:08:13,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-10-15 17:08:13,525 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:08:13,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:08:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-15 17:08:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-15 17:08:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:08:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-10-15 17:08:13,531 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 41 [2022-10-15 17:08:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:08:13,532 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-10-15 17:08:13,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 17:08:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-10-15 17:08:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-15 17:08:13,534 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:08:13,534 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2022-10-15 17:08:13,576 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 17:08:13,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-15 17:08:13,747 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:08:13,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:08:13,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2010413206, now seen corresponding path program 5 times [2022-10-15 17:08:13,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:08:13,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289160473] [2022-10-15 17:08:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:08:13,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:08:13,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668164206] [2022-10-15 17:08:13,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-15 17:08:13,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:08:13,762 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 17:08:13,779 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 17:08:13,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-10-15 17:08:13,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:08:13,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-15 17:08:13,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:08:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-15 17:08:14,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:08:14,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:08:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289160473] [2022-10-15 17:08:14,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:08:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668164206] [2022-10-15 17:08:14,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668164206] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:08:14,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:08:14,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-10-15 17:08:14,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174963608] [2022-10-15 17:08:14,193 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 17:08:14,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 17:08:14,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:08:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 17:08:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:08:14,195 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:08:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:08:14,368 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-10-15 17:08:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 17:08:14,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-10-15 17:08:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:08:14,370 INFO L225 Difference]: With dead ends: 39 [2022-10-15 17:08:14,370 INFO L226 Difference]: Without dead ends: 36 [2022-10-15 17:08:14,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-10-15 17:08:14,371 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:08:14,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 148 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:08:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-10-15 17:08:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-10-15 17:08:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-15 17:08:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-10-15 17:08:14,377 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 48 [2022-10-15 17:08:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:08:14,377 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-10-15 17:08:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:08:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-10-15 17:08:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-15 17:08:14,379 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:08:14,379 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2022-10-15 17:08:14,418 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 17:08:14,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:14,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2022-10-15 17:08:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:08:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash -225552901, now seen corresponding path program 6 times [2022-10-15 17:08:14,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:08:14,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056344573] [2022-10-15 17:08:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:08:14,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:08:14,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:08:14,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223279625] [2022-10-15 17:08:14,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-15 17:08:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:08:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:08:14,611 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 17:08:14,638 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 17:08:14,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-10-15 17:08:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:08:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 46 conjunts are in the unsatisfiable core [2022-10-15 17:08:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:08:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 71 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-10-15 17:08:15,278 INFO L328 TraceCheckSpWp]: Computing backward predicates...