/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/array-patterns/array23_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:58:08,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:58:08,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:58:08,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 03:58:08,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 03:58:08,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 03:58:08,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 03:58:08,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 03:58:08,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 03:58:08,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 03:58:08,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 03:58:08,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 03:58:08,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:58:08,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:58:08,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:58:08,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:58:08,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:58:08,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:58:08,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:58:08,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:58:08,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:58:08,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:58:08,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:58:08,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:58:08,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 03:58:08,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 03:58:08,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 03:58:08,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 03:58:08,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 03:58:08,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 03:58:08,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 03:58:08,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 03:58:08,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 03:58:08,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:58:08,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:58:08,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:58:08,840 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 03:58:08,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:58:08,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:58:08,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:58:08,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:58:08,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:58:08,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:58:08,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:58:08,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:58:08,861 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:58:08,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:58:08,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:58:08,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:58:08,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:58:08,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:58:08,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:58:08,862 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:58:08,862 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:58:08,862 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:58:08,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:58:08,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:58:08,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:58:08,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:58:08,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:58:08,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:58:08,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:58:08,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:58:08,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:58:08,863 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:58:08,863 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:58:08,863 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:58:08,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:58:08,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:58:08,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:58:08,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:58:09,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:58:09,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:58:09,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:58:09,082 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:58:09,084 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:58:09,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array23_pattern.c [2022-01-10 03:58:09,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485badf27/4fc3d7ccb00c496dad0d6640ad879a9d/FLAG0574ed48e [2022-01-10 03:58:09,480 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:58:09,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array23_pattern.c [2022-01-10 03:58:09,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485badf27/4fc3d7ccb00c496dad0d6640ad879a9d/FLAG0574ed48e [2022-01-10 03:58:09,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485badf27/4fc3d7ccb00c496dad0d6640ad879a9d [2022-01-10 03:58:09,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:58:09,916 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:58:09,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:58:09,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:58:09,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:58:09,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:58:09" (1/1) ... [2022-01-10 03:58:09,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c5e35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:09, skipping insertion in model container [2022-01-10 03:58:09,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:58:09" (1/1) ... [2022-01-10 03:58:09,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:58:09,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:58:10,094 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array23_pattern.c[1347,1360] [2022-01-10 03:58:10,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:58:10,127 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:58:10,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array23_pattern.c[1347,1360] [2022-01-10 03:58:10,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:58:10,165 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:58:10,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10 WrapperNode [2022-01-10 03:58:10,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:58:10,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:58:10,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:58:10,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:58:10,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,205 INFO L137 Inliner]: procedures = 19, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-01-10 03:58:10,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:58:10,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:58:10,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:58:10,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:58:10,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:58:10,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:58:10,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:58:10,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:58:10,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (1/1) ... [2022-01-10 03:58:10,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:58:10,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:58:10,254 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 03:58:10,269 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 03:58:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2022-01-10 03:58:10,291 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2022-01-10 03:58:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:58:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:58:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:58:10,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:58:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:58:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:58:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:58:10,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:58:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:58:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:58:10,371 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:58:10,373 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:58:10,819 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:58:10,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:58:10,825 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 03:58:10,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:58:10 BoogieIcfgContainer [2022-01-10 03:58:10,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:58:10,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:58:10,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:58:10,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:58:10,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:58:09" (1/3) ... [2022-01-10 03:58:10,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246e0ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:58:10, skipping insertion in model container [2022-01-10 03:58:10,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:10" (2/3) ... [2022-01-10 03:58:10,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246e0ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:58:10, skipping insertion in model container [2022-01-10 03:58:10,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:58:10" (3/3) ... [2022-01-10 03:58:10,833 INFO L111 eAbstractionObserver]: Analyzing ICFG array23_pattern.c [2022-01-10 03:58:10,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:58:10,837 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:58:10,871 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:58:10,876 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 03:58:10,876 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:58:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:58:10,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:10,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:10,892 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:10,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:10,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1776900022, now seen corresponding path program 1 times [2022-01-10 03:58:10,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:10,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716082246] [2022-01-10 03:58:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:10,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:10,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:10,906 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 03:58:10,912 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 03:58:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:10,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:58:11,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:11,048 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 03:58:11,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:11,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716082246] [2022-01-10 03:58:11,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716082246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:11,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:11,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:58:11,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048252785] [2022-01-10 03:58:11,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:11,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:58:11,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:58:11,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:58:11,077 INFO L87 Difference]: Start difference. First operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:58:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:11,095 INFO L93 Difference]: Finished difference Result 75 states and 113 transitions. [2022-01-10 03:58:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:58:11,096 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-10 03:58:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:11,101 INFO L225 Difference]: With dead ends: 75 [2022-01-10 03:58:11,101 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 03:58:11,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:58:11,107 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:11,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:58:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 03:58:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-10 03:58:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-01-10 03:58:11,143 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 15 [2022-01-10 03:58:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:11,143 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-01-10 03:58:11,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:58:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-01-10 03:58:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 03:58:11,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:11,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 03:58:11,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 03:58:11,357 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 03:58:11,359 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:11,362 INFO L85 PathProgramCache]: Analyzing trace with hash 136661359, now seen corresponding path program 1 times [2022-01-10 03:58:11,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:11,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674509683] [2022-01-10 03:58:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:11,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:11,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:11,367 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 03:58:11,369 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 03:58:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:58:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:58:11,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:11,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674509683] [2022-01-10 03:58:11,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674509683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:11,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:11,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:58:11,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187215044] [2022-01-10 03:58:11,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:11,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:58:11,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:11,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:58:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:58:11,692 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:11,800 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-01-10 03:58:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:58:11,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-01-10 03:58:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:11,803 INFO L225 Difference]: With dead ends: 42 [2022-01-10 03:58:11,803 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 03:58:11,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:58:11,805 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:11,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:58:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 03:58:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-10 03:58:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-01-10 03:58:11,812 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 40 [2022-01-10 03:58:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:11,813 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-01-10 03:58:11,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-01-10 03:58:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:58:11,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:11,815 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 03:58:11,827 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 03:58:12,019 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 03:58:12,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1379198517, now seen corresponding path program 1 times [2022-01-10 03:58:12,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:12,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288915957] [2022-01-10 03:58:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:12,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:12,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:12,023 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 03:58:12,025 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 03:58:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:58:12,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 03:58:12,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:12,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:12,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288915957] [2022-01-10 03:58:12,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288915957] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:12,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:12,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 03:58:12,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647947841] [2022-01-10 03:58:12,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:12,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:58:12,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:12,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:58:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:12,452 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:12,462 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-01-10 03:58:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:58:12,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-01-10 03:58:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:12,463 INFO L225 Difference]: With dead ends: 73 [2022-01-10 03:58:12,463 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 03:58:12,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:12,464 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:12,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 132 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2022-01-10 03:58:12,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 03:58:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-10 03:58:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-01-10 03:58:12,471 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 45 [2022-01-10 03:58:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:12,471 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-01-10 03:58:12,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-01-10 03:58:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 03:58:12,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:12,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 03:58:12,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:12,673 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 03:58:12,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 718774395, now seen corresponding path program 1 times [2022-01-10 03:58:12,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:12,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833979898] [2022-01-10 03:58:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:12,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:12,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:12,677 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 03:58:12,677 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 03:58:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:12,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:58:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 03:58:13,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:13,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:13,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833979898] [2022-01-10 03:58:13,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833979898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:13,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:13,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 03:58:13,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226374854] [2022-01-10 03:58:13,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:13,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:58:13,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:13,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:58:13,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:13,032 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:13,040 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2022-01-10 03:58:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:58:13,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2022-01-10 03:58:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:13,042 INFO L225 Difference]: With dead ends: 78 [2022-01-10 03:58:13,042 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 03:58:13,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:13,043 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:13,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 136 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 71 Unchecked, 0.0s Time] [2022-01-10 03:58:13,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 03:58:13,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-10 03:58:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-01-10 03:58:13,049 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 48 [2022-01-10 03:58:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:13,050 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-01-10 03:58:13,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-01-10 03:58:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 03:58:13,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:13,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 03:58:13,071 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 03:58:13,266 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 03:58:13,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1173811335, now seen corresponding path program 1 times [2022-01-10 03:58:13,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:13,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334375374] [2022-01-10 03:58:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:13,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:13,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:13,270 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 03:58:13,271 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 03:58:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:58:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 03:58:13,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:58:14,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:14,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334375374] [2022-01-10 03:58:14,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334375374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:14,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:14,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-01-10 03:58:14,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035345426] [2022-01-10 03:58:14,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:14,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 03:58:14,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:14,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 03:58:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:58:14,090 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 03:58:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:14,504 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2022-01-10 03:58:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 03:58:14,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 50 [2022-01-10 03:58:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:14,506 INFO L225 Difference]: With dead ends: 80 [2022-01-10 03:58:14,506 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 03:58:14,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:58:14,507 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:14,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 120 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2022-01-10 03:58:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 03:58:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-10 03:58:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-01-10 03:58:14,514 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 50 [2022-01-10 03:58:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:14,514 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-01-10 03:58:14,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 03:58:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-01-10 03:58:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 03:58:14,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:14,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 03:58:14,534 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 03:58:14,736 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 03:58:14,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:14,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:14,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1117435639, now seen corresponding path program 2 times [2022-01-10 03:58:14,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:14,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550184105] [2022-01-10 03:58:14,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:58:14,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:14,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:14,740 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 03:58:14,767 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 03:58:15,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:58:15,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:15,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:58:15,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:58:15,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:58:16,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:16,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550184105] [2022-01-10 03:58:16,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550184105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:16,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:16,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-01-10 03:58:16,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113163257] [2022-01-10 03:58:16,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:16,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:58:16,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:58:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:58:16,040 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:17,819 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2022-01-10 03:58:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 03:58:17,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2022-01-10 03:58:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:17,822 INFO L225 Difference]: With dead ends: 150 [2022-01-10 03:58:17,822 INFO L226 Difference]: Without dead ends: 146 [2022-01-10 03:58:17,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2022-01-10 03:58:17,823 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 316 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:17,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 275 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 217 Invalid, 0 Unknown, 335 Unchecked, 1.3s Time] [2022-01-10 03:58:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-10 03:58:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2022-01-10 03:58:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.345679012345679) internal successors, (109), 81 states have internal predecessors, (109), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 03:58:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2022-01-10 03:58:17,839 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 52 [2022-01-10 03:58:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:17,839 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2022-01-10 03:58:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2022-01-10 03:58:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 03:58:17,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:17,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:17,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 03:58:18,055 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 03:58:18,056 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash -156197905, now seen corresponding path program 3 times [2022-01-10 03:58:18,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:18,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479397563] [2022-01-10 03:58:18,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:58:18,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:18,058 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 03:58:18,059 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 03:58:18,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:58:18,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:18,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:58:18,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:58:18,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 03:58:18,930 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:18,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479397563] [2022-01-10 03:58:18,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479397563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:18,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:18,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-01-10 03:58:18,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559211832] [2022-01-10 03:58:18,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:18,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 03:58:18,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:18,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 03:58:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:58:18,932 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 03:58:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:20,135 INFO L93 Difference]: Finished difference Result 191 states and 261 transitions. [2022-01-10 03:58:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 03:58:20,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 55 [2022-01-10 03:58:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:20,138 INFO L225 Difference]: With dead ends: 191 [2022-01-10 03:58:20,138 INFO L226 Difference]: Without dead ends: 180 [2022-01-10 03:58:20,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:58:20,140 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:20,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 223 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 200 Unchecked, 0.7s Time] [2022-01-10 03:58:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-10 03:58:20,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2022-01-10 03:58:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 122 states have internal predecessors, (164), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2022-01-10 03:58:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 220 transitions. [2022-01-10 03:58:20,164 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 220 transitions. Word has length 55 [2022-01-10 03:58:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:20,164 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 220 transitions. [2022-01-10 03:58:20,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 03:58:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 220 transitions. [2022-01-10 03:58:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 03:58:20,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:20,166 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:20,180 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 03:58:20,379 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 03:58:20,380 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:20,380 INFO L85 PathProgramCache]: Analyzing trace with hash 657953707, now seen corresponding path program 4 times [2022-01-10 03:58:20,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:20,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453433963] [2022-01-10 03:58:20,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:58:20,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:20,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:20,382 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 03:58:20,384 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 03:58:20,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:58:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:20,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:58:20,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:58:20,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 03:58:21,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:21,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453433963] [2022-01-10 03:58:21,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453433963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:21,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:21,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2022-01-10 03:58:21,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589863892] [2022-01-10 03:58:21,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:21,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:58:21,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:58:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:58:21,476 INFO L87 Difference]: Start difference. First operand 159 states and 220 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 03:58:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:22,245 INFO L93 Difference]: Finished difference Result 269 states and 371 transitions. [2022-01-10 03:58:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 03:58:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 55 [2022-01-10 03:58:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:22,248 INFO L225 Difference]: With dead ends: 269 [2022-01-10 03:58:22,248 INFO L226 Difference]: Without dead ends: 173 [2022-01-10 03:58:22,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:58:22,249 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:22,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 176 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-01-10 03:58:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-10 03:58:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-01-10 03:58:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 135 states have (on average 1.348148148148148) internal successors, (182), 135 states have internal predecessors, (182), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2022-01-10 03:58:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 238 transitions. [2022-01-10 03:58:22,294 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 238 transitions. Word has length 55 [2022-01-10 03:58:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:22,294 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 238 transitions. [2022-01-10 03:58:22,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 03:58:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 238 transitions. [2022-01-10 03:58:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 03:58:22,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:22,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:22,317 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 03:58:22,518 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 03:58:22,518 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:22,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1520395453, now seen corresponding path program 1 times [2022-01-10 03:58:22,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:22,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704060123] [2022-01-10 03:58:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:22,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:22,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:22,521 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 03:58:22,522 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 03:58:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:58:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 03:58:22,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:22,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:22,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704060123] [2022-01-10 03:58:22,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704060123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:22,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:22,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:58:22,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093942758] [2022-01-10 03:58:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:22,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:58:22,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:58:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:58:22,710 INFO L87 Difference]: Start difference. First operand 172 states and 238 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 03:58:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:22,840 INFO L93 Difference]: Finished difference Result 264 states and 364 transitions. [2022-01-10 03:58:22,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:58:22,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2022-01-10 03:58:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:22,852 INFO L225 Difference]: With dead ends: 264 [2022-01-10 03:58:22,852 INFO L226 Difference]: Without dead ends: 190 [2022-01-10 03:58:22,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:58:22,854 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:22,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:58:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-10 03:58:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2022-01-10 03:58:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 144 states have (on average 1.3263888888888888) internal successors, (191), 141 states have internal predecessors, (191), 25 states have call successors, (25), 11 states have call predecessors, (25), 14 states have return successors, (37), 31 states have call predecessors, (37), 25 states have call successors, (37) [2022-01-10 03:58:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 253 transitions. [2022-01-10 03:58:22,871 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 253 transitions. Word has length 57 [2022-01-10 03:58:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:22,871 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 253 transitions. [2022-01-10 03:58:22,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 03:58:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 253 transitions. [2022-01-10 03:58:22,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 03:58:22,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:22,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-10 03:58:22,889 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 03:58:23,086 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 03:58:23,087 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1009861276, now seen corresponding path program 1 times [2022-01-10 03:58:23,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:23,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387899294] [2022-01-10 03:58:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:23,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:23,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:23,093 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 03:58:23,095 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 03:58:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:23,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:58:23,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 03:58:23,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 03:58:23,729 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:23,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387899294] [2022-01-10 03:58:23,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387899294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:23,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:23,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2022-01-10 03:58:23,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852616207] [2022-01-10 03:58:23,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:23,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 03:58:23,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:23,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 03:58:23,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 03:58:23,731 INFO L87 Difference]: Start difference. First operand 184 states and 253 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:24,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:24,375 INFO L93 Difference]: Finished difference Result 398 states and 556 transitions. [2022-01-10 03:58:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:58:24,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 03:58:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:24,378 INFO L225 Difference]: With dead ends: 398 [2022-01-10 03:58:24,378 INFO L226 Difference]: Without dead ends: 259 [2022-01-10 03:58:24,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-10 03:58:24,380 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:24,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 163 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 03:58:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-10 03:58:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 214. [2022-01-10 03:58:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 168 states have (on average 1.3154761904761905) internal successors, (221), 159 states have internal predecessors, (221), 31 states have call successors, (31), 17 states have call predecessors, (31), 14 states have return successors, (43), 37 states have call predecessors, (43), 31 states have call successors, (43) [2022-01-10 03:58:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 295 transitions. [2022-01-10 03:58:24,399 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 295 transitions. Word has length 57 [2022-01-10 03:58:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:24,399 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 295 transitions. [2022-01-10 03:58:24,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 295 transitions. [2022-01-10 03:58:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 03:58:24,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:24,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:24,419 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 03:58:24,614 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 03:58:24,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:24,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:24,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1289553017, now seen corresponding path program 1 times [2022-01-10 03:58:24,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:24,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498805040] [2022-01-10 03:58:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:24,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:24,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:24,617 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 03:58:24,619 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 03:58:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:58:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 03:58:24,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:24,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:24,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498805040] [2022-01-10 03:58:24,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498805040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:24,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:24,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:58:24,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370551629] [2022-01-10 03:58:24,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:24,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:58:24,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:24,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:58:24,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:58:24,782 INFO L87 Difference]: Start difference. First operand 214 states and 295 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:24,880 INFO L93 Difference]: Finished difference Result 312 states and 427 transitions. [2022-01-10 03:58:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:58:24,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 03:58:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:24,887 INFO L225 Difference]: With dead ends: 312 [2022-01-10 03:58:24,887 INFO L226 Difference]: Without dead ends: 214 [2022-01-10 03:58:24,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:58:24,888 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:24,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:58:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-10 03:58:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-01-10 03:58:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 168 states have (on average 1.2797619047619047) internal successors, (215), 159 states have internal predecessors, (215), 31 states have call successors, (31), 17 states have call predecessors, (31), 14 states have return successors, (43), 37 states have call predecessors, (43), 31 states have call successors, (43) [2022-01-10 03:58:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2022-01-10 03:58:24,911 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 57 [2022-01-10 03:58:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:24,912 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2022-01-10 03:58:24,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2022-01-10 03:58:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 03:58:24,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:24,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:24,930 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 03:58:25,127 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 03:58:25,128 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:25,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2040341539, now seen corresponding path program 1 times [2022-01-10 03:58:25,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:25,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842678931] [2022-01-10 03:58:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:25,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:25,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:25,130 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 03:58:25,131 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 03:58:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:25,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:58:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 03:58:25,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:25,313 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:25,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842678931] [2022-01-10 03:58:25,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842678931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:25,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:25,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:58:25,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565105477] [2022-01-10 03:58:25,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:25,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:58:25,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:25,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:58:25,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:58:25,314 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:25,409 INFO L93 Difference]: Finished difference Result 374 states and 499 transitions. [2022-01-10 03:58:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:58:25,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 03:58:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:25,415 INFO L225 Difference]: With dead ends: 374 [2022-01-10 03:58:25,415 INFO L226 Difference]: Without dead ends: 205 [2022-01-10 03:58:25,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:58:25,416 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:25,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 136 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:58:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-10 03:58:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2022-01-10 03:58:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 159 states have (on average 1.2389937106918238) internal successors, (197), 153 states have internal predecessors, (197), 28 states have call successors, (28), 17 states have call predecessors, (28), 14 states have return successors, (37), 31 states have call predecessors, (37), 28 states have call successors, (37) [2022-01-10 03:58:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 262 transitions. [2022-01-10 03:58:25,430 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 262 transitions. Word has length 57 [2022-01-10 03:58:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:25,430 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 262 transitions. [2022-01-10 03:58:25,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 262 transitions. [2022-01-10 03:58:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 03:58:25,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:25,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-10 03:58:25,446 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 03:58:25,643 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 03:58:25,644 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1760649798, now seen corresponding path program 1 times [2022-01-10 03:58:25,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:25,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018007227] [2022-01-10 03:58:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:25,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:25,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:25,646 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 03:58:25,648 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 03:58:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:58:25,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 03:58:25,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 03:58:26,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:26,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018007227] [2022-01-10 03:58:26,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018007227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:26,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:26,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2022-01-10 03:58:26,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500968924] [2022-01-10 03:58:26,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:26,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 03:58:26,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:26,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 03:58:26,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 03:58:26,321 INFO L87 Difference]: Start difference. First operand 202 states and 262 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:27,073 INFO L93 Difference]: Finished difference Result 339 states and 439 transitions. [2022-01-10 03:58:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:58:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 03:58:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:27,076 INFO L225 Difference]: With dead ends: 339 [2022-01-10 03:58:27,076 INFO L226 Difference]: Without dead ends: 241 [2022-01-10 03:58:27,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-10 03:58:27,077 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 24 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:27,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 220 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 03:58:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-10 03:58:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 208. [2022-01-10 03:58:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 165 states have (on average 1.2303030303030302) internal successors, (203), 156 states have internal predecessors, (203), 28 states have call successors, (28), 20 states have call predecessors, (28), 14 states have return successors, (34), 31 states have call predecessors, (34), 28 states have call successors, (34) [2022-01-10 03:58:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 265 transitions. [2022-01-10 03:58:27,091 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 265 transitions. Word has length 57 [2022-01-10 03:58:27,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:27,091 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 265 transitions. [2022-01-10 03:58:27,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:27,091 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 265 transitions. [2022-01-10 03:58:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 03:58:27,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:27,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:27,103 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 03:58:27,299 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 03:58:27,299 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2023783321, now seen corresponding path program 1 times [2022-01-10 03:58:27,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:27,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101076009] [2022-01-10 03:58:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:27,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:27,301 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 03:58:27,302 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 03:58:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:27,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:58:27,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 03:58:27,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:27,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:27,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101076009] [2022-01-10 03:58:27,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101076009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:27,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:27,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:58:27,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860943757] [2022-01-10 03:58:27,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:27,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:58:27,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:58:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:58:27,460 INFO L87 Difference]: Start difference. First operand 208 states and 265 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 03:58:27,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:27,610 INFO L93 Difference]: Finished difference Result 315 states and 397 transitions. [2022-01-10 03:58:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:58:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2022-01-10 03:58:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:27,623 INFO L225 Difference]: With dead ends: 315 [2022-01-10 03:58:27,623 INFO L226 Difference]: Without dead ends: 211 [2022-01-10 03:58:27,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:58:27,624 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:27,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 136 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:58:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-10 03:58:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-01-10 03:58:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 165 states have (on average 1.2121212121212122) internal successors, (200), 156 states have internal predecessors, (200), 28 states have call successors, (28), 20 states have call predecessors, (28), 14 states have return successors, (34), 31 states have call predecessors, (34), 28 states have call successors, (34) [2022-01-10 03:58:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 262 transitions. [2022-01-10 03:58:27,637 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 262 transitions. Word has length 57 [2022-01-10 03:58:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:27,637 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 262 transitions. [2022-01-10 03:58:27,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 03:58:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 262 transitions. [2022-01-10 03:58:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 03:58:27,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:27,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:27,653 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 03:58:27,851 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 03:58:27,851 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1436977307, now seen corresponding path program 1 times [2022-01-10 03:58:27,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:27,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531184354] [2022-01-10 03:58:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:27,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:27,854 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 03:58:27,855 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 03:58:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:58:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 03:58:28,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 03:58:28,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531184354] [2022-01-10 03:58:28,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531184354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:28,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:28,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-01-10 03:58:28,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385299817] [2022-01-10 03:58:28,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:28,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:58:28,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:28,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:58:28,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:58:28,804 INFO L87 Difference]: Start difference. First operand 208 states and 262 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 03:58:30,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:30,183 INFO L93 Difference]: Finished difference Result 379 states and 487 transitions. [2022-01-10 03:58:30,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 03:58:30,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 57 [2022-01-10 03:58:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:30,196 INFO L225 Difference]: With dead ends: 379 [2022-01-10 03:58:30,196 INFO L226 Difference]: Without dead ends: 251 [2022-01-10 03:58:30,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=533, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:58:30,197 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:30,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 182 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 127 Invalid, 0 Unknown, 105 Unchecked, 0.7s Time] [2022-01-10 03:58:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-10 03:58:30,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2022-01-10 03:58:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 201 states have (on average 1.2189054726368158) internal successors, (245), 193 states have internal predecessors, (245), 29 states have call successors, (29), 21 states have call predecessors, (29), 15 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2022-01-10 03:58:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 309 transitions. [2022-01-10 03:58:30,215 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 309 transitions. Word has length 57 [2022-01-10 03:58:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:30,215 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 309 transitions. [2022-01-10 03:58:30,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 03:58:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 309 transitions. [2022-01-10 03:58:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 03:58:30,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:30,217 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2022-01-10 03:58:30,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:30,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:30,427 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:30,427 INFO L85 PathProgramCache]: Analyzing trace with hash 663548241, now seen corresponding path program 2 times [2022-01-10 03:58:30,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:30,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305047088] [2022-01-10 03:58:30,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:58:30,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:30,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:30,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:30,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 03:58:30,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:58:30,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 03:58:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:58:31,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 03:58:31,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:31,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305047088] [2022-01-10 03:58:31,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305047088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:31,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:31,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2022-01-10 03:58:31,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132414866] [2022-01-10 03:58:31,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:31,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:58:31,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:58:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:58:31,661 INFO L87 Difference]: Start difference. First operand 246 states and 309 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:33,723 INFO L93 Difference]: Finished difference Result 405 states and 522 transitions. [2022-01-10 03:58:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 03:58:33,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 58 [2022-01-10 03:58:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:33,736 INFO L225 Difference]: With dead ends: 405 [2022-01-10 03:58:33,736 INFO L226 Difference]: Without dead ends: 401 [2022-01-10 03:58:33,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2022-01-10 03:58:33,737 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 179 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:33,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 335 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 109 Invalid, 0 Unknown, 214 Unchecked, 1.1s Time] [2022-01-10 03:58:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-10 03:58:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 368. [2022-01-10 03:58:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 301 states have (on average 1.2524916943521596) internal successors, (377), 289 states have internal predecessors, (377), 45 states have call successors, (45), 31 states have call predecessors, (45), 21 states have return successors, (55), 47 states have call predecessors, (55), 45 states have call successors, (55) [2022-01-10 03:58:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 477 transitions. [2022-01-10 03:58:33,777 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 477 transitions. Word has length 58 [2022-01-10 03:58:33,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:33,778 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 477 transitions. [2022-01-10 03:58:33,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 477 transitions. [2022-01-10 03:58:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 03:58:33,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:33,780 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2022-01-10 03:58:33,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:33,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:33,991 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:33,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash -356053541, now seen corresponding path program 3 times [2022-01-10 03:58:33,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:33,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292241320] [2022-01-10 03:58:33,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:58:33,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:33,993 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:33,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 03:58:34,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:58:34,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:58:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 03:58:34,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-10 03:58:34,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292241320] [2022-01-10 03:58:34,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292241320] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:34,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:34,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 03:58:34,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541269390] [2022-01-10 03:58:34,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:34,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:58:34,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:34,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:58:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:58:34,862 INFO L87 Difference]: Start difference. First operand 368 states and 477 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:34,964 INFO L93 Difference]: Finished difference Result 380 states and 491 transitions. [2022-01-10 03:58:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:58:34,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2022-01-10 03:58:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:34,966 INFO L225 Difference]: With dead ends: 380 [2022-01-10 03:58:34,966 INFO L226 Difference]: Without dead ends: 376 [2022-01-10 03:58:34,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:58:34,967 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 30 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:34,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 137 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 79 Unchecked, 0.0s Time] [2022-01-10 03:58:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-10 03:58:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 302. [2022-01-10 03:58:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 247 states have (on average 1.2469635627530364) internal successors, (308), 238 states have internal predecessors, (308), 36 states have call successors, (36), 26 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2022-01-10 03:58:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 388 transitions. [2022-01-10 03:58:34,994 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 388 transitions. Word has length 61 [2022-01-10 03:58:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:34,994 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 388 transitions. [2022-01-10 03:58:34,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 388 transitions. [2022-01-10 03:58:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 03:58:34,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:34,996 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2022-01-10 03:58:35,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 03:58:35,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:35,204 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1199480847, now seen corresponding path program 5 times [2022-01-10 03:58:35,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:35,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825239055] [2022-01-10 03:58:35,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:58:35,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:35,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:35,205 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:35,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 03:58:35,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-10 03:58:35,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:58:35,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:58:35,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 03:58:36,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:36,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825239055] [2022-01-10 03:58:36,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825239055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:36,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:36,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:58:36,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269352964] [2022-01-10 03:58:36,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:36,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:58:36,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:58:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:58:36,355 INFO L87 Difference]: Start difference. First operand 302 states and 388 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 03:58:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:44,710 INFO L93 Difference]: Finished difference Result 661 states and 866 transitions. [2022-01-10 03:58:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-10 03:58:44,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 61 [2022-01-10 03:58:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:44,714 INFO L225 Difference]: With dead ends: 661 [2022-01-10 03:58:44,714 INFO L226 Difference]: Without dead ends: 512 [2022-01-10 03:58:44,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=909, Invalid=2283, Unknown=0, NotChecked=0, Total=3192 [2022-01-10 03:58:44,715 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 236 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:44,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 355 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-10 03:58:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-10 03:58:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 345. [2022-01-10 03:58:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 311 states have (on average 1.315112540192926) internal successors, (409), 305 states have internal predecessors, (409), 21 states have call successors, (21), 16 states have call predecessors, (21), 12 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-01-10 03:58:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 455 transitions. [2022-01-10 03:58:44,753 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 455 transitions. Word has length 61 [2022-01-10 03:58:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:44,754 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 455 transitions. [2022-01-10 03:58:44,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 03:58:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 455 transitions. [2022-01-10 03:58:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 03:58:44,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:44,755 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2022-01-10 03:58:44,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:44,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:44,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:44,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1139333613, now seen corresponding path program 6 times [2022-01-10 03:58:44,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:44,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251156404] [2022-01-10 03:58:44,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:58:44,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:44,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:44,969 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:44,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 03:58:45,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-10 03:58:45,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:45,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:58:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 03:58:45,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 03:58:46,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:46,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251156404] [2022-01-10 03:58:46,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251156404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:46,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:46,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2022-01-10 03:58:46,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654046044] [2022-01-10 03:58:46,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:46,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 03:58:46,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:46,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 03:58:46,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:58:46,151 INFO L87 Difference]: Start difference. First operand 345 states and 455 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:46,913 INFO L93 Difference]: Finished difference Result 451 states and 593 transitions. [2022-01-10 03:58:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 03:58:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2022-01-10 03:58:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:46,915 INFO L225 Difference]: With dead ends: 451 [2022-01-10 03:58:46,915 INFO L226 Difference]: Without dead ends: 426 [2022-01-10 03:58:46,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:58:46,916 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 63 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:46,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 170 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 133 Invalid, 0 Unknown, 125 Unchecked, 0.6s Time] [2022-01-10 03:58:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-10 03:58:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 419. [2022-01-10 03:58:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 364 states have (on average 1.2912087912087913) internal successors, (470), 355 states have internal predecessors, (470), 36 states have call successors, (36), 26 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2022-01-10 03:58:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 550 transitions. [2022-01-10 03:58:46,961 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 550 transitions. Word has length 62 [2022-01-10 03:58:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:46,961 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 550 transitions. [2022-01-10 03:58:46,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 550 transitions. [2022-01-10 03:58:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 03:58:46,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:46,963 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2022-01-10 03:58:46,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:47,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:47,177 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:47,178 INFO L85 PathProgramCache]: Analyzing trace with hash 657351467, now seen corresponding path program 7 times [2022-01-10 03:58:47,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:47,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154264510] [2022-01-10 03:58:47,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 03:58:47,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:47,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:47,180 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:47,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 03:58:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:47,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:58:47,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 03:58:47,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 03:58:48,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154264510] [2022-01-10 03:58:48,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154264510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:48,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:48,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-01-10 03:58:48,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584121175] [2022-01-10 03:58:48,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:48,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 03:58:48,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:48,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 03:58:48,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:58:48,308 INFO L87 Difference]: Start difference. First operand 419 states and 550 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:49,299 INFO L93 Difference]: Finished difference Result 700 states and 916 transitions. [2022-01-10 03:58:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 03:58:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2022-01-10 03:58:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:49,302 INFO L225 Difference]: With dead ends: 700 [2022-01-10 03:58:49,302 INFO L226 Difference]: Without dead ends: 686 [2022-01-10 03:58:49,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2022-01-10 03:58:49,303 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 202 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:49,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 178 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 94 Invalid, 0 Unknown, 123 Unchecked, 0.6s Time] [2022-01-10 03:58:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-10 03:58:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 671. [2022-01-10 03:58:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 580 states have (on average 1.2793103448275862) internal successors, (742), 567 states have internal predecessors, (742), 59 states have call successors, (59), 40 states have call predecessors, (59), 31 states have return successors, (72), 63 states have call predecessors, (72), 59 states have call successors, (72) [2022-01-10 03:58:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 873 transitions. [2022-01-10 03:58:49,384 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 873 transitions. Word has length 64 [2022-01-10 03:58:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:49,384 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 873 transitions. [2022-01-10 03:58:49,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 873 transitions. [2022-01-10 03:58:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 03:58:49,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:49,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2022-01-10 03:58:49,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:49,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:49,604 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2053781873, now seen corresponding path program 4 times [2022-01-10 03:58:49,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370492715] [2022-01-10 03:58:49,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:58:49,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:49,605 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:49,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 03:58:49,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:58:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:58:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 03:58:50,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 03:58:50,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:50,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370492715] [2022-01-10 03:58:50,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370492715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:50,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:50,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-01-10 03:58:50,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122681052] [2022-01-10 03:58:50,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:50,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:58:50,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:58:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:58:50,697 INFO L87 Difference]: Start difference. First operand 671 states and 873 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:51,320 INFO L93 Difference]: Finished difference Result 865 states and 1129 transitions. [2022-01-10 03:58:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 03:58:51,329 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2022-01-10 03:58:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:51,332 INFO L225 Difference]: With dead ends: 865 [2022-01-10 03:58:51,333 INFO L226 Difference]: Without dead ends: 814 [2022-01-10 03:58:51,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:58:51,334 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 53 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:51,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 202 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 88 Unchecked, 0.5s Time] [2022-01-10 03:58:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-10 03:58:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 751. [2022-01-10 03:58:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 630 states have (on average 1.2666666666666666) internal successors, (798), 615 states have internal predecessors, (798), 81 states have call successors, (81), 52 states have call predecessors, (81), 39 states have return successors, (100), 83 states have call predecessors, (100), 81 states have call successors, (100) [2022-01-10 03:58:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 979 transitions. [2022-01-10 03:58:51,432 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 979 transitions. Word has length 64 [2022-01-10 03:58:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:51,432 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 979 transitions. [2022-01-10 03:58:51,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:58:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 979 transitions. [2022-01-10 03:58:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 03:58:51,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:51,434 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2022-01-10 03:58:51,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:51,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:51,652 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:51,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1418481587, now seen corresponding path program 5 times [2022-01-10 03:58:51,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:51,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185418725] [2022-01-10 03:58:51,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:58:51,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:51,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:51,654 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:51,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 03:58:52,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-10 03:58:52,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:52,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 03:58:52,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 03:58:52,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 03:58:53,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:53,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185418725] [2022-01-10 03:58:53,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185418725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:53,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:53,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-01-10 03:58:53,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487896806] [2022-01-10 03:58:53,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:53,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:58:53,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:58:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:58:53,012 INFO L87 Difference]: Start difference. First operand 751 states and 979 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 03:58:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:54,666 INFO L93 Difference]: Finished difference Result 1220 states and 1584 transitions. [2022-01-10 03:58:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:58:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-01-10 03:58:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:54,671 INFO L225 Difference]: With dead ends: 1220 [2022-01-10 03:58:54,671 INFO L226 Difference]: Without dead ends: 733 [2022-01-10 03:58:54,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2022-01-10 03:58:54,672 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 132 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:54,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 285 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 03:58:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-10 03:58:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 496. [2022-01-10 03:58:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 415 states have (on average 1.1975903614457832) internal successors, (497), 406 states have internal predecessors, (497), 50 states have call successors, (50), 36 states have call predecessors, (50), 30 states have return successors, (61), 53 states have call predecessors, (61), 50 states have call successors, (61) [2022-01-10 03:58:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 608 transitions. [2022-01-10 03:58:54,733 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 608 transitions. Word has length 66 [2022-01-10 03:58:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:54,733 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 608 transitions. [2022-01-10 03:58:54,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 03:58:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 608 transitions. [2022-01-10 03:58:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 03:58:54,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:54,734 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2022-01-10 03:58:54,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:54,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:54,949 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:54,949 INFO L85 PathProgramCache]: Analyzing trace with hash 986341039, now seen corresponding path program 8 times [2022-01-10 03:58:54,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:54,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68567797] [2022-01-10 03:58:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:58:54,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:54,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:54,950 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:54,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 03:58:55,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:58:55,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-10 03:58:55,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:56,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-01-10 03:58:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:58:56,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2022-01-10 03:58:58,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:58:58,252 INFO L353 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-01-10 03:58:58,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 65 [2022-01-10 03:58:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:58:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:58:59,659 INFO L353 Elim1Store]: treesize reduction 202, result has 15.5 percent of original size [2022-01-10 03:58:59,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 82 [2022-01-10 03:59:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:05,814 INFO L353 Elim1Store]: treesize reduction 316, result has 34.8 percent of original size [2022-01-10 03:59:05,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 201