/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:19:28,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:19:28,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:19:29,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 04:19:29,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 04:19:29,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 04:19:29,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 04:19:29,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 04:19:29,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 04:19:29,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 04:19:29,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 04:19:29,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 04:19:29,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 04:19:29,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 04:19:29,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 04:19:29,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 04:19:29,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 04:19:29,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 04:19:29,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 04:19:29,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 04:19:29,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 04:19:29,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 04:19:29,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 04:19:29,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 04:19:29,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 04:19:29,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 04:19:29,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 04:19:29,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 04:19:29,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 04:19:29,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 04:19:29,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 04:19:29,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 04:19:29,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 04:19:29,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 04:19:29,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 04:19:29,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 04:19:29,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 04:19:29,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 04:19:29,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:19:29,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:19:29,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:19:29,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 04:19:29,069 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:19:29,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:19:29,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:19:29,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:19:29,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:19:29,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:19:29,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:19:29,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:19:29,071 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:19:29,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:19:29,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:19:29,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:19:29,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:19:29,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:19:29,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:19:29,072 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:19:29,072 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:19:29,072 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:19:29,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:19:29,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:19:29,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:19:29,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:19:29,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:19:29,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:19:29,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:19:29,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:19:29,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:19:29,074 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:19:29,074 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:19:29,074 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:19:29,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:19:29,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:19:29,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:19:29,075 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:19:29,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:19:29,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:19:29,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:19:29,295 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:19:29,299 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:19:29,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label05.c [2022-01-10 04:19:29,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76f6496b5/9cdec7579fed4a1b989a0356425386c8/FLAGb1e178cdc [2022-01-10 04:19:29,787 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:19:29,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label05.c [2022-01-10 04:19:29,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76f6496b5/9cdec7579fed4a1b989a0356425386c8/FLAGb1e178cdc [2022-01-10 04:19:29,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76f6496b5/9cdec7579fed4a1b989a0356425386c8 [2022-01-10 04:19:29,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:19:29,818 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:19:29,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:19:29,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:19:29,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:19:29,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:19:29" (1/1) ... [2022-01-10 04:19:29,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f95a344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:29, skipping insertion in model container [2022-01-10 04:19:29,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:19:29" (1/1) ... [2022-01-10 04:19:29,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:19:29,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:19:30,262 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label05.c[55544,55557] [2022-01-10 04:19:30,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:19:30,298 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:19:30,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label05.c[55544,55557] [2022-01-10 04:19:30,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:19:30,448 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:19:30,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30 WrapperNode [2022-01-10 04:19:30,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:19:30,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:19:30,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:19:30,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:19:30,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,559 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 04:19:30,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:19:30,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:19:30,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:19:30,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:19:30,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:19:30,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:19:30,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:19:30,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:19:30,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (1/1) ... [2022-01-10 04:19:30,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:19:30,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:19:30,677 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) [2022-01-10 04:19:30,690 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 [2022-01-10 04:19:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:19:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:19:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:19:30,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:19:30,780 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:19:30,781 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:19:32,211 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:19:32,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:19:32,217 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 04:19:32,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:19:32 BoogieIcfgContainer [2022-01-10 04:19:32,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:19:32,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:19:32,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:19:32,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:19:32,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:19:29" (1/3) ... [2022-01-10 04:19:32,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc1a8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:19:32, skipping insertion in model container [2022-01-10 04:19:32,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:19:30" (2/3) ... [2022-01-10 04:19:32,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc1a8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:19:32, skipping insertion in model container [2022-01-10 04:19:32,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:19:32" (3/3) ... [2022-01-10 04:19:32,225 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label05.c [2022-01-10 04:19:32,228 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:19:32,228 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:19:32,265 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:19:32,272 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 04:19:32,272 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:19:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:19:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-10 04:19:32,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:19:32,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:19:32,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:19:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:19:32,305 INFO L85 PathProgramCache]: Analyzing trace with hash -684231142, now seen corresponding path program 1 times [2022-01-10 04:19:32,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:19:32,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453715075] [2022-01-10 04:19:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:19:32,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:19:32,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:19:32,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:19:32,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 04:19:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:19:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 04:19:32,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:19:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:19:43,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:19:43,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:19:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453715075] [2022-01-10 04:19:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453715075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:19:43,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:19:43,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 04:19:43,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397010406] [2022-01-10 04:19:43,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:19:43,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 04:19:43,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:19:43,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 04:19:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-10 04:19:43,339 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:19:46,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:19:46,552 INFO L93 Difference]: Finished difference Result 718 states and 1265 transitions. [2022-01-10 04:19:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 04:19:46,554 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-01-10 04:19:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:19:46,562 INFO L225 Difference]: With dead ends: 718 [2022-01-10 04:19:46,562 INFO L226 Difference]: Without dead ends: 352 [2022-01-10 04:19:46,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:19:46,567 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 431 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 04:19:46,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 464 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 04:19:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-10 04:19:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-01-10 04:19:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.4586894586894588) internal successors, (512), 351 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:19:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 512 transitions. [2022-01-10 04:19:46,608 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 512 transitions. Word has length 158 [2022-01-10 04:19:46,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:19:46,609 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 512 transitions. [2022-01-10 04:19:46,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:19:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 512 transitions. [2022-01-10 04:19:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 04:19:46,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:19:46,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:19:46,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 04:19:46,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:19:46,832 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:19:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:19:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1461448827, now seen corresponding path program 1 times [2022-01-10 04:19:46,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:19:46,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109812565] [2022-01-10 04:19:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:19:46,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:19:46,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:19:46,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:19:46,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 04:19:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:19:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-10 04:19:46,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:20:02,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:02,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109812565] [2022-01-10 04:20:02,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109812565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:02,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:02,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 04:20:02,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412058609] [2022-01-10 04:20:02,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:02,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 04:20:02,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 04:20:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-10 04:20:02,698 INFO L87 Difference]: Start difference. First operand 352 states and 512 transitions. Second operand has 11 states, 11 states have (on average 15.0) internal successors, (165), 10 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:07,702 INFO L93 Difference]: Finished difference Result 1139 states and 1872 transitions. [2022-01-10 04:20:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 04:20:07,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.0) internal successors, (165), 10 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-01-10 04:20:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:07,706 INFO L225 Difference]: With dead ends: 1139 [2022-01-10 04:20:07,706 INFO L226 Difference]: Without dead ends: 902 [2022-01-10 04:20:07,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-10 04:20:07,710 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 1494 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 4406 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 4653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 4406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:07,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 348 Invalid, 4653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 4406 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-01-10 04:20:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-01-10 04:20:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 899. [2022-01-10 04:20:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.2360801781737194) internal successors, (1110), 898 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1110 transitions. [2022-01-10 04:20:07,755 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1110 transitions. Word has length 165 [2022-01-10 04:20:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:07,755 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1110 transitions. [2022-01-10 04:20:07,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.0) internal successors, (165), 10 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1110 transitions. [2022-01-10 04:20:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-10 04:20:07,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:07,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:07,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:07,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:07,960 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:07,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:07,961 INFO L85 PathProgramCache]: Analyzing trace with hash 30534116, now seen corresponding path program 1 times [2022-01-10 04:20:07,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:07,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323934060] [2022-01-10 04:20:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:07,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:07,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:07,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:07,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 04:20:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:20:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 04:20:08,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:08,303 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:08,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323934060] [2022-01-10 04:20:08,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323934060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:08,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:08,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:20:08,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900112570] [2022-01-10 04:20:08,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:08,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:08,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:08,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:08,305 INFO L87 Difference]: Start difference. First operand 899 states and 1110 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:09,173 INFO L93 Difference]: Finished difference Result 1766 states and 2370 transitions. [2022-01-10 04:20:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:09,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-01-10 04:20:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:09,178 INFO L225 Difference]: With dead ends: 1766 [2022-01-10 04:20:09,178 INFO L226 Difference]: Without dead ends: 1326 [2022-01-10 04:20:09,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:09,179 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 99 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:09,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 181 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:20:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-01-10 04:20:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1312. [2022-01-10 04:20:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 1.2875667429443174) internal successors, (1688), 1311 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1688 transitions. [2022-01-10 04:20:09,204 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1688 transitions. Word has length 173 [2022-01-10 04:20:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:09,204 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1688 transitions. [2022-01-10 04:20:09,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1688 transitions. [2022-01-10 04:20:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 04:20:09,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:09,206 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:09,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 04:20:09,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:09,413 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:09,413 INFO L85 PathProgramCache]: Analyzing trace with hash -978055840, now seen corresponding path program 1 times [2022-01-10 04:20:09,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:09,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031945471] [2022-01-10 04:20:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:09,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:09,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:09,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:09,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 04:20:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:20:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 04:20:09,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:09,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031945471] [2022-01-10 04:20:09,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031945471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:09,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:09,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:20:09,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678742690] [2022-01-10 04:20:09,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:09,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:09,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:09,689 INFO L87 Difference]: Start difference. First operand 1312 states and 1688 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:10,034 INFO L93 Difference]: Finished difference Result 2196 states and 3118 transitions. [2022-01-10 04:20:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2022-01-10 04:20:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:10,040 INFO L225 Difference]: With dead ends: 2196 [2022-01-10 04:20:10,040 INFO L226 Difference]: Without dead ends: 1749 [2022-01-10 04:20:10,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:10,041 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:10,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 553 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 04:20:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-01-10 04:20:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1747. [2022-01-10 04:20:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 1.3676975945017182) internal successors, (2388), 1746 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2388 transitions. [2022-01-10 04:20:10,069 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2388 transitions. Word has length 178 [2022-01-10 04:20:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:10,069 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 2388 transitions. [2022-01-10 04:20:10,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2388 transitions. [2022-01-10 04:20:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-10 04:20:10,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:10,072 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:10,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:10,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:10,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1541383291, now seen corresponding path program 2 times [2022-01-10 04:20:10,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:10,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93669357] [2022-01-10 04:20:10,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:20:10,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:10,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:10,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:10,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 04:20:10,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 04:20:10,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:20:10,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:20:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 04:20:10,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:10,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:10,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93669357] [2022-01-10 04:20:10,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93669357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:10,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:10,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:20:10,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893815393] [2022-01-10 04:20:10,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:10,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:10,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:10,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:10,645 INFO L87 Difference]: Start difference. First operand 1747 states and 2388 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:11,506 INFO L93 Difference]: Finished difference Result 4267 states and 6149 transitions. [2022-01-10 04:20:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-01-10 04:20:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:11,514 INFO L225 Difference]: With dead ends: 4267 [2022-01-10 04:20:11,515 INFO L226 Difference]: Without dead ends: 2979 [2022-01-10 04:20:11,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:11,517 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 108 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:11,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 338 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:20:11,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2022-01-10 04:20:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2970. [2022-01-10 04:20:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 1.3587066352307173) internal successors, (4034), 2969 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4034 transitions. [2022-01-10 04:20:11,560 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4034 transitions. Word has length 180 [2022-01-10 04:20:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:11,561 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 4034 transitions. [2022-01-10 04:20:11,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4034 transitions. [2022-01-10 04:20:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-10 04:20:11,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:11,564 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:11,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:11,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:11,772 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1756021231, now seen corresponding path program 1 times [2022-01-10 04:20:11,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:11,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884742864] [2022-01-10 04:20:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:11,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:11,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:11,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:11,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 04:20:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:20:11,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 04:20:12,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:12,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:12,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884742864] [2022-01-10 04:20:12,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884742864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:12,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:12,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:20:12,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102925313] [2022-01-10 04:20:12,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:12,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:12,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:12,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:12,050 INFO L87 Difference]: Start difference. First operand 2970 states and 4034 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:12,886 INFO L93 Difference]: Finished difference Result 6908 states and 9864 transitions. [2022-01-10 04:20:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2022-01-10 04:20:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:12,897 INFO L225 Difference]: With dead ends: 6908 [2022-01-10 04:20:12,897 INFO L226 Difference]: Without dead ends: 4397 [2022-01-10 04:20:12,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:12,902 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 236 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:12,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 390 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:20:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2022-01-10 04:20:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 4191. [2022-01-10 04:20:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4190 states have (on average 1.2997613365155132) internal successors, (5446), 4190 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 5446 transitions. [2022-01-10 04:20:12,955 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 5446 transitions. Word has length 186 [2022-01-10 04:20:12,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:12,955 INFO L470 AbstractCegarLoop]: Abstraction has 4191 states and 5446 transitions. [2022-01-10 04:20:12,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 5446 transitions. [2022-01-10 04:20:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-10 04:20:12,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:12,961 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:12,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:13,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:13,172 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1418110712, now seen corresponding path program 1 times [2022-01-10 04:20:13,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:13,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508580247] [2022-01-10 04:20:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:13,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:13,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:13,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:13,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 04:20:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:13,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:20:13,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 04:20:13,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:13,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508580247] [2022-01-10 04:20:13,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508580247] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:13,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:13,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:20:13,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810117770] [2022-01-10 04:20:13,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:13,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:13,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:13,489 INFO L87 Difference]: Start difference. First operand 4191 states and 5446 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:13,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:13,954 INFO L93 Difference]: Finished difference Result 7477 states and 9904 transitions. [2022-01-10 04:20:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:13,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2022-01-10 04:20:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:13,974 INFO L225 Difference]: With dead ends: 7477 [2022-01-10 04:20:13,974 INFO L226 Difference]: Without dead ends: 4151 [2022-01-10 04:20:13,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:13,990 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 321 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:13,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 04:20:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2022-01-10 04:20:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 4151. [2022-01-10 04:20:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4151 states, 4150 states have (on average 1.2433734939759036) internal successors, (5160), 4150 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4151 states to 4151 states and 5160 transitions. [2022-01-10 04:20:14,030 INFO L78 Accepts]: Start accepts. Automaton has 4151 states and 5160 transitions. Word has length 193 [2022-01-10 04:20:14,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:14,030 INFO L470 AbstractCegarLoop]: Abstraction has 4151 states and 5160 transitions. [2022-01-10 04:20:14,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4151 states and 5160 transitions. [2022-01-10 04:20:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-10 04:20:14,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:14,034 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:14,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:14,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:14,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:14,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2073981396, now seen corresponding path program 1 times [2022-01-10 04:20:14,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:14,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310706114] [2022-01-10 04:20:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:14,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:14,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:14,243 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:14,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 04:20:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:20:14,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 04:20:14,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:14,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:14,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310706114] [2022-01-10 04:20:14,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310706114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:14,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:14,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:20:14,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977058374] [2022-01-10 04:20:14,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:14,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 04:20:14,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:14,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 04:20:14,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:20:14,668 INFO L87 Difference]: Start difference. First operand 4151 states and 5160 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:15,712 INFO L93 Difference]: Finished difference Result 10700 states and 13608 transitions. [2022-01-10 04:20:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 04:20:15,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2022-01-10 04:20:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:15,740 INFO L225 Difference]: With dead ends: 10700 [2022-01-10 04:20:15,740 INFO L226 Difference]: Without dead ends: 7008 [2022-01-10 04:20:15,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:20:15,745 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 539 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:15,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 54 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 04:20:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7008 states. [2022-01-10 04:20:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7008 to 6999. [2022-01-10 04:20:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6999 states, 6998 states have (on average 1.2417833666761933) internal successors, (8690), 6998 states have internal predecessors, (8690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6999 states to 6999 states and 8690 transitions. [2022-01-10 04:20:15,810 INFO L78 Accepts]: Start accepts. Automaton has 6999 states and 8690 transitions. Word has length 227 [2022-01-10 04:20:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:15,810 INFO L470 AbstractCegarLoop]: Abstraction has 6999 states and 8690 transitions. [2022-01-10 04:20:15,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 6999 states and 8690 transitions. [2022-01-10 04:20:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-10 04:20:15,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:15,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:15,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:16,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:16,024 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash -737025460, now seen corresponding path program 1 times [2022-01-10 04:20:16,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:16,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230715090] [2022-01-10 04:20:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:16,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:16,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:16,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 04:20:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:16,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:20:16,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 04:20:16,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:16,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230715090] [2022-01-10 04:20:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230715090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:16,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:16,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:20:16,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130284623] [2022-01-10 04:20:16,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:16,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:16,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:16,471 INFO L87 Difference]: Start difference. First operand 6999 states and 8690 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:17,274 INFO L93 Difference]: Finished difference Result 13946 states and 17745 transitions. [2022-01-10 04:20:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:17,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2022-01-10 04:20:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:17,292 INFO L225 Difference]: With dead ends: 13946 [2022-01-10 04:20:17,292 INFO L226 Difference]: Without dead ends: 7203 [2022-01-10 04:20:17,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:17,298 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 186 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:17,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 160 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:20:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2022-01-10 04:20:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 7202. [2022-01-10 04:20:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7202 states, 7201 states have (on average 1.2432995417303152) internal successors, (8953), 7201 states have internal predecessors, (8953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7202 states to 7202 states and 8953 transitions. [2022-01-10 04:20:17,382 INFO L78 Accepts]: Start accepts. Automaton has 7202 states and 8953 transitions. Word has length 260 [2022-01-10 04:20:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:17,382 INFO L470 AbstractCegarLoop]: Abstraction has 7202 states and 8953 transitions. [2022-01-10 04:20:17,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 7202 states and 8953 transitions. [2022-01-10 04:20:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-10 04:20:17,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:17,389 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:17,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:17,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:17,596 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:17,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1674225632, now seen corresponding path program 1 times [2022-01-10 04:20:17,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:17,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277504461] [2022-01-10 04:20:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:17,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:17,599 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:17,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 04:20:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:17,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:20:17,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 04:20:18,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:18,209 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277504461] [2022-01-10 04:20:18,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277504461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:18,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:18,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:20:18,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398956938] [2022-01-10 04:20:18,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:18,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:18,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:18,212 INFO L87 Difference]: Start difference. First operand 7202 states and 8953 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:19,059 INFO L93 Difference]: Finished difference Result 15779 states and 19724 transitions. [2022-01-10 04:20:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2022-01-10 04:20:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:19,068 INFO L225 Difference]: With dead ends: 15779 [2022-01-10 04:20:19,069 INFO L226 Difference]: Without dead ends: 8833 [2022-01-10 04:20:19,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:19,073 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 119 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:19,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 223 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:20:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8833 states. [2022-01-10 04:20:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8833 to 8826. [2022-01-10 04:20:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8826 states, 8825 states have (on average 1.228215297450425) internal successors, (10839), 8825 states have internal predecessors, (10839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8826 states to 8826 states and 10839 transitions. [2022-01-10 04:20:19,145 INFO L78 Accepts]: Start accepts. Automaton has 8826 states and 10839 transitions. Word has length 273 [2022-01-10 04:20:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:19,146 INFO L470 AbstractCegarLoop]: Abstraction has 8826 states and 10839 transitions. [2022-01-10 04:20:19,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 8826 states and 10839 transitions. [2022-01-10 04:20:19,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-10 04:20:19,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:19,154 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:19,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:19,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:19,372 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:19,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1497206111, now seen corresponding path program 2 times [2022-01-10 04:20:19,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:19,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746174508] [2022-01-10 04:20:19,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:20:19,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:19,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:19,375 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:19,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 04:20:19,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 04:20:19,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:20:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:20:19,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 04:20:19,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:19,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:19,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746174508] [2022-01-10 04:20:19,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746174508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:19,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:19,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:20:19,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884604997] [2022-01-10 04:20:19,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:19,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:19,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:19,888 INFO L87 Difference]: Start difference. First operand 8826 states and 10839 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:20,747 INFO L93 Difference]: Finished difference Result 20444 states and 25779 transitions. [2022-01-10 04:20:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2022-01-10 04:20:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:20,763 INFO L225 Difference]: With dead ends: 20444 [2022-01-10 04:20:20,763 INFO L226 Difference]: Without dead ends: 11874 [2022-01-10 04:20:20,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:20,770 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 101 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:20,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 299 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:20:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11874 states. [2022-01-10 04:20:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11874 to 11871. [2022-01-10 04:20:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11871 states, 11870 states have (on average 1.2690817186183656) internal successors, (15064), 11870 states have internal predecessors, (15064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11871 states to 11871 states and 15064 transitions. [2022-01-10 04:20:20,897 INFO L78 Accepts]: Start accepts. Automaton has 11871 states and 15064 transitions. Word has length 280 [2022-01-10 04:20:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:20,898 INFO L470 AbstractCegarLoop]: Abstraction has 11871 states and 15064 transitions. [2022-01-10 04:20:20,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 11871 states and 15064 transitions. [2022-01-10 04:20:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-01-10 04:20:20,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:20,910 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:20,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:21,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:21,117 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1918788829, now seen corresponding path program 1 times [2022-01-10 04:20:21,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:21,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053037255] [2022-01-10 04:20:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:21,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:21,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:21,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:21,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 04:20:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:21,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:20:21,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 04:20:21,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:21,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:21,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053037255] [2022-01-10 04:20:21,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053037255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:21,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:21,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:20:21,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81078400] [2022-01-10 04:20:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:21,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:21,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:21,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:21,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:21,546 INFO L87 Difference]: Start difference. First operand 11871 states and 15064 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:22,399 INFO L93 Difference]: Finished difference Result 32829 states and 41701 transitions. [2022-01-10 04:20:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2022-01-10 04:20:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:22,428 INFO L225 Difference]: With dead ends: 32829 [2022-01-10 04:20:22,428 INFO L226 Difference]: Without dead ends: 21214 [2022-01-10 04:20:22,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:22,441 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 219 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:22,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 269 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:20:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21214 states. [2022-01-10 04:20:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21214 to 21211. [2022-01-10 04:20:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21211 states, 21210 states have (on average 1.217161716171617) internal successors, (25816), 21210 states have internal predecessors, (25816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21211 states to 21211 states and 25816 transitions. [2022-01-10 04:20:22,689 INFO L78 Accepts]: Start accepts. Automaton has 21211 states and 25816 transitions. Word has length 300 [2022-01-10 04:20:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:22,689 INFO L470 AbstractCegarLoop]: Abstraction has 21211 states and 25816 transitions. [2022-01-10 04:20:22,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 21211 states and 25816 transitions. [2022-01-10 04:20:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-10 04:20:22,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:22,703 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:22,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 04:20:22,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:22,910 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:22,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:22,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1521676146, now seen corresponding path program 1 times [2022-01-10 04:20:22,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:22,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995670532] [2022-01-10 04:20:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:22,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:22,913 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:22,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 04:20:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:23,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:20:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-10 04:20:23,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:23,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995670532] [2022-01-10 04:20:23,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995670532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:23,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:23,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:20:23,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512486386] [2022-01-10 04:20:23,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:23,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:23,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:23,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:23,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:23,437 INFO L87 Difference]: Start difference. First operand 21211 states and 25816 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:24,329 INFO L93 Difference]: Finished difference Result 45421 states and 55306 transitions. [2022-01-10 04:20:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 301 [2022-01-10 04:20:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:24,361 INFO L225 Difference]: With dead ends: 45421 [2022-01-10 04:20:24,362 INFO L226 Difference]: Without dead ends: 24466 [2022-01-10 04:20:24,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:24,380 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 165 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:24,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 265 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:20:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24466 states. [2022-01-10 04:20:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24466 to 23444. [2022-01-10 04:20:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23444 states, 23443 states have (on average 1.208036514098025) internal successors, (28320), 23443 states have internal predecessors, (28320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23444 states to 23444 states and 28320 transitions. [2022-01-10 04:20:24,635 INFO L78 Accepts]: Start accepts. Automaton has 23444 states and 28320 transitions. Word has length 301 [2022-01-10 04:20:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:24,635 INFO L470 AbstractCegarLoop]: Abstraction has 23444 states and 28320 transitions. [2022-01-10 04:20:24,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 23444 states and 28320 transitions. [2022-01-10 04:20:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-10 04:20:24,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:24,649 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:24,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:24,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:24,856 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1192486057, now seen corresponding path program 1 times [2022-01-10 04:20:24,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:24,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129780818] [2022-01-10 04:20:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:24,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:24,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:24,860 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:24,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 04:20:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:24,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:20:25,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 04:20:25,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:20:25,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:25,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129780818] [2022-01-10 04:20:25,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129780818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:20:25,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:20:25,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:20:25,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563816891] [2022-01-10 04:20:25,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:20:25,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:20:25,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:20:25,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:25,443 INFO L87 Difference]: Start difference. First operand 23444 states and 28320 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:20:26,392 INFO L93 Difference]: Finished difference Result 55364 states and 66603 transitions. [2022-01-10 04:20:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:20:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2022-01-10 04:20:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:20:26,433 INFO L225 Difference]: With dead ends: 55364 [2022-01-10 04:20:26,433 INFO L226 Difference]: Without dead ends: 32176 [2022-01-10 04:20:26,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:20:26,447 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 81 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:20:26,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 199 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:20:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32176 states. [2022-01-10 04:20:26,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32176 to 31159. [2022-01-10 04:20:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31159 states, 31158 states have (on average 1.1699403042557288) internal successors, (36453), 31158 states have internal predecessors, (36453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31159 states to 31159 states and 36453 transitions. [2022-01-10 04:20:26,772 INFO L78 Accepts]: Start accepts. Automaton has 31159 states and 36453 transitions. Word has length 307 [2022-01-10 04:20:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:20:26,772 INFO L470 AbstractCegarLoop]: Abstraction has 31159 states and 36453 transitions. [2022-01-10 04:20:26,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 31159 states and 36453 transitions. [2022-01-10 04:20:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-10 04:20:26,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:26,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:26,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 04:20:27,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:20:27,003 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1294533701, now seen corresponding path program 1 times [2022-01-10 04:20:27,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:27,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596209942] [2022-01-10 04:20:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:27,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:27,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:27,007 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:27,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 04:20:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 04:20:27,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:20:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 215 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:20:30,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:20:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 215 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:20:33,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:20:33,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596209942] [2022-01-10 04:20:33,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596209942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:20:33,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:20:33,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 04:20:33,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838560373] [2022-01-10 04:20:33,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:20:33,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 04:20:33,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:20:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 04:20:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 04:20:33,116 INFO L87 Difference]: Start difference. First operand 31159 states and 36453 transitions. Second operand has 7 states, 7 states have (on average 67.42857142857143) internal successors, (472), 6 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)