/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/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:00:23,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:00:23,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:00:23,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:00:23,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:00:23,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:00:23,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:00:23,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:00:23,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:00:23,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:00:23,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:00:23,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:00:23,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:00:23,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:00:23,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:00:23,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:00:23,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:00:23,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:00:23,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:00:23,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:00:23,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:00:23,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:00:23,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:00:23,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:00:23,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:00:23,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:00:23,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:00:23,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:00:23,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:00:23,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:00:23,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:00:23,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:00:23,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:00:23,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:00:23,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:00:23,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:00:23,696 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 08:00:23,721 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:00:23,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:00:23,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:00:23,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:00:23,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:00:23,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:00:23,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:00:23,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:00:23,723 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:00:23,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:00:23,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:00:23,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:00:23,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:00:23,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:00:23,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:00:23,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:00:23,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:00:23,726 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:00:23,726 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:00:23,726 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:00:23,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:00:23,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:00:23,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:00:23,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:00:23,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:00:23,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:00:23,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:00:23,932 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:00:23,932 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:00:23,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c [2022-01-10 08:00:23,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6abe970/7a8fa8b8be2041b2acb0f7beeff86523/FLAGc2c906225 [2022-01-10 08:00:24,653 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:00:24,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c [2022-01-10 08:00:24,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6abe970/7a8fa8b8be2041b2acb0f7beeff86523/FLAGc2c906225 [2022-01-10 08:00:24,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6abe970/7a8fa8b8be2041b2acb0f7beeff86523 [2022-01-10 08:00:24,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:00:24,817 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:00:24,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:00:24,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:00:24,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:00:24,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4057b209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24, skipping insertion in model container [2022-01-10 08:00:24,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:00:24,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:00:25,295 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c[6354,6367] [2022-01-10 08:00:25,336 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c[14102,14115] [2022-01-10 08:00:25,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:00:25,838 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:00:25,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c[6354,6367] [2022-01-10 08:00:25,873 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c[14102,14115] [2022-01-10 08:00:26,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:00:26,167 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:00:26,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26 WrapperNode [2022-01-10 08:00:26,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:00:26,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:00:26,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:00:26,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:00:26,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,330 INFO L137 Inliner]: procedures = 34, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 4957 [2022-01-10 08:00:26,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:00:26,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:00:26,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:00:26,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:00:26,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:00:26,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:00:26,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:00:26,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:00:26,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (1/1) ... [2022-01-10 08:00:26,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:00:26,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:00:26,584 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 08:00:26,654 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 08:00:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:00:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:00:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:00:26,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:00:26,742 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:00:26,743 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:00:50,576 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:00:50,590 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:00:50,591 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 08:00:50,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:00:50 BoogieIcfgContainer [2022-01-10 08:00:50,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:00:50,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:00:50,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:00:50,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:00:50,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:00:24" (1/3) ... [2022-01-10 08:00:50,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77256012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:00:50, skipping insertion in model container [2022-01-10 08:00:50,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:26" (2/3) ... [2022-01-10 08:00:50,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77256012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:00:50, skipping insertion in model container [2022-01-10 08:00:50,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:00:50" (3/3) ... [2022-01-10 08:00:50,617 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c [2022-01-10 08:00:50,621 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:00:50,622 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:00:50,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:00:50,665 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 08:00:50,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:00:50,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 08:00:50,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:50,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:50,701 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:50,706 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2022-01-10 08:00:50,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:50,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198326875] [2022-01-10 08:00:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:50,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:50,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:50,720 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 08:00:50,724 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 08:00:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:50,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 08:00:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:50,865 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 08:00:50,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:50,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:50,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198326875] [2022-01-10 08:00:50,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198326875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:50,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:50,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:00:50,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101166396] [2022-01-10 08:00:50,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:50,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 08:00:50,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:50,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 08:00:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:00:50,892 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:50,988 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2022-01-10 08:00:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 08:00:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 08:00:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:51,005 INFO L225 Difference]: With dead ends: 1734 [2022-01-10 08:00:51,005 INFO L226 Difference]: Without dead ends: 812 [2022-01-10 08:00:51,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 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 08:00:51,014 INFO L933 BasicCegarLoop]: 1600 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, 1600 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 08:00:51,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-10 08:00:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2022-01-10 08:00:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2022-01-10 08:00:51,101 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2022-01-10 08:00:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:51,101 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2022-01-10 08:00:51,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2022-01-10 08:00:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 08:00:51,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:51,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:51,115 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 08:00:51,315 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 08:00:51,315 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2022-01-10 08:00:51,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:51,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921489137] [2022-01-10 08:00:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:51,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:51,338 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 08:00:51,339 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 08:00:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:51,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:00:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:51,504 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 08:00:51,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:51,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921489137] [2022-01-10 08:00:51,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921489137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:51,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:51,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:00:51,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355833682] [2022-01-10 08:00:51,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:51,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:00:51,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:51,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:00:51,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:00:51,513 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:51,625 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2022-01-10 08:00:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:00:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 08:00:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:51,644 INFO L225 Difference]: With dead ends: 888 [2022-01-10 08:00:51,645 INFO L226 Difference]: Without dead ends: 848 [2022-01-10 08:00:51,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:00:51,646 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 58 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:51,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 6095 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:00:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-10 08:00:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2022-01-10 08:00:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2022-01-10 08:00:51,714 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2022-01-10 08:00:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:51,715 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2022-01-10 08:00:51,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2022-01-10 08:00:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 08:00:51,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:51,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:51,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 08:00:51,927 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 08:00:51,928 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2022-01-10 08:00:51,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814738234] [2022-01-10 08:00:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:51,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:51,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:51,930 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 08:00:51,932 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 08:00:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:00:51,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:52,156 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 08:00:52,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:52,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814738234] [2022-01-10 08:00:52,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814738234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:52,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:52,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:00:52,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144017219] [2022-01-10 08:00:52,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:52,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:00:52,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:52,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:00:52,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:52,158 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:52,187 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2022-01-10 08:00:52,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:00:52,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-10 08:00:52,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:52,203 INFO L225 Difference]: With dead ends: 878 [2022-01-10 08:00:52,203 INFO L226 Difference]: Without dead ends: 842 [2022-01-10 08:00:52,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:52,205 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:52,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-10 08:00:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2022-01-10 08:00:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.8627684964200477) internal successors, (1561), 839 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2022-01-10 08:00:52,223 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2022-01-10 08:00:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:52,224 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2022-01-10 08:00:52,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2022-01-10 08:00:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 08:00:52,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:52,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:52,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 08:00:52,432 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 08:00:52,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:52,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:52,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2022-01-10 08:00:52,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:52,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574086832] [2022-01-10 08:00:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:52,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:52,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:52,443 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 08:00:52,456 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 08:00:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:52,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:00:52,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:52,909 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 08:00:52,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:52,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:52,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574086832] [2022-01-10 08:00:52,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574086832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:52,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:52,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:00:52,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971487974] [2022-01-10 08:00:52,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:52,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:00:52,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:00:52,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:00:52,911 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:52,994 INFO L93 Difference]: Finished difference Result 1096 states and 1961 transitions. [2022-01-10 08:00:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:00:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-10 08:00:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:52,998 INFO L225 Difference]: With dead ends: 1096 [2022-01-10 08:00:52,998 INFO L226 Difference]: Without dead ends: 1032 [2022-01-10 08:00:52,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:00:52,999 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 1678 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:52,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1678 Valid, 1680 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:00:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-10 08:00:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 964. [2022-01-10 08:00:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 962 states have (on average 1.8222453222453223) internal successors, (1753), 963 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1753 transitions. [2022-01-10 08:00:53,013 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1753 transitions. Word has length 41 [2022-01-10 08:00:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:53,013 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1753 transitions. [2022-01-10 08:00:53,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1753 transitions. [2022-01-10 08:00:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 08:00:53,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:53,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:53,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 08:00:53,220 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 08:00:53,220 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:53,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2022-01-10 08:00:53,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:53,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111340477] [2022-01-10 08:00:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:53,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:53,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:53,222 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 08:00:53,224 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 08:00:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:53,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:00:53,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:53,356 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 08:00:53,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:53,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:53,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111340477] [2022-01-10 08:00:53,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111340477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:53,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:53,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:00:53,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220280187] [2022-01-10 08:00:53,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:53,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:00:53,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:53,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:00:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:53,358 INFO L87 Difference]: Start difference. First operand 964 states and 1753 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:53,387 INFO L93 Difference]: Finished difference Result 1242 states and 2182 transitions. [2022-01-10 08:00:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:00:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-10 08:00:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:53,391 INFO L225 Difference]: With dead ends: 1242 [2022-01-10 08:00:53,391 INFO L226 Difference]: Without dead ends: 1054 [2022-01-10 08:00:53,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:53,392 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:53,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-01-10 08:00:53,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1052. [2022-01-10 08:00:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1050 states have (on average 1.7942857142857143) internal successors, (1884), 1051 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1884 transitions. [2022-01-10 08:00:53,407 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1884 transitions. Word has length 43 [2022-01-10 08:00:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:53,407 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1884 transitions. [2022-01-10 08:00:53,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1884 transitions. [2022-01-10 08:00:53,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 08:00:53,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:53,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:53,417 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 08:00:53,616 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 08:00:53,616 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:53,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:53,617 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2022-01-10 08:00:53,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:53,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406210676] [2022-01-10 08:00:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:53,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:53,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:53,618 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 08:00:53,648 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 08:00:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:00:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:53,808 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 08:00:53,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:53,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:53,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406210676] [2022-01-10 08:00:53,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406210676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:53,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:53,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:00:53,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324434444] [2022-01-10 08:00:53,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:53,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:00:53,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:53,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:00:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:53,811 INFO L87 Difference]: Start difference. First operand 1052 states and 1884 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:53,841 INFO L93 Difference]: Finished difference Result 1546 states and 2636 transitions. [2022-01-10 08:00:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:00:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-10 08:00:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:53,846 INFO L225 Difference]: With dead ends: 1546 [2022-01-10 08:00:53,846 INFO L226 Difference]: Without dead ends: 1272 [2022-01-10 08:00:53,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:53,849 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:53,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-01-10 08:00:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1270. [2022-01-10 08:00:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1268 states have (on average 1.7389589905362777) internal successors, (2205), 1269 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2205 transitions. [2022-01-10 08:00:53,867 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2205 transitions. Word has length 43 [2022-01-10 08:00:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:53,868 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 2205 transitions. [2022-01-10 08:00:53,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2205 transitions. [2022-01-10 08:00:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 08:00:53,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:53,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:53,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 08:00:54,076 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 08:00:54,078 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2022-01-10 08:00:54,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:54,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237791046] [2022-01-10 08:00:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:54,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:54,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:54,080 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 08:00:54,082 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 08:00:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:54,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:00:54,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:54,217 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 08:00:54,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:54,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:54,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237791046] [2022-01-10 08:00:54,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237791046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:54,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:54,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:00:54,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542395764] [2022-01-10 08:00:54,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:54,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:00:54,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:00:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:54,219 INFO L87 Difference]: Start difference. First operand 1270 states and 2205 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:54,249 INFO L93 Difference]: Finished difference Result 2146 states and 3509 transitions. [2022-01-10 08:00:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:00:54,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-10 08:00:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:54,254 INFO L225 Difference]: With dead ends: 2146 [2022-01-10 08:00:54,254 INFO L226 Difference]: Without dead ends: 1654 [2022-01-10 08:00:54,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:54,255 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:54,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-01-10 08:00:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1652. [2022-01-10 08:00:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1650 states have (on average 1.6654545454545455) internal successors, (2748), 1651 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2748 transitions. [2022-01-10 08:00:54,280 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2748 transitions. Word has length 43 [2022-01-10 08:00:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:54,281 INFO L470 AbstractCegarLoop]: Abstraction has 1652 states and 2748 transitions. [2022-01-10 08:00:54,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2748 transitions. [2022-01-10 08:00:54,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 08:00:54,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:54,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:54,289 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 08:00:54,488 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 08:00:54,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:54,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:54,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2022-01-10 08:00:54,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:54,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486836772] [2022-01-10 08:00:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:54,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:54,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:54,492 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 08:00:54,494 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 08:00:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:00:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:54,644 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 08:00:54,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:54,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:54,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486836772] [2022-01-10 08:00:54,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486836772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:54,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:54,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:00:54,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630589180] [2022-01-10 08:00:54,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:54,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:00:54,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:00:54,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:00:54,645 INFO L87 Difference]: Start difference. First operand 1652 states and 2748 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:54,727 INFO L93 Difference]: Finished difference Result 2498 states and 3940 transitions. [2022-01-10 08:00:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:00:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-10 08:00:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:54,734 INFO L225 Difference]: With dead ends: 2498 [2022-01-10 08:00:54,734 INFO L226 Difference]: Without dead ends: 2496 [2022-01-10 08:00:54,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:00:54,735 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 139 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6078 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:54,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6078 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2022-01-10 08:00:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1736. [2022-01-10 08:00:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1734 states have (on average 1.6309111880046137) internal successors, (2828), 1735 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2828 transitions. [2022-01-10 08:00:54,822 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2828 transitions. Word has length 44 [2022-01-10 08:00:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:54,822 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 2828 transitions. [2022-01-10 08:00:54,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2828 transitions. [2022-01-10 08:00:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:00:54,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:54,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:54,838 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 08:00:55,030 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 08:00:55,031 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2022-01-10 08:00:55,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:55,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877997833] [2022-01-10 08:00:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:55,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:55,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:55,044 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 08:00:55,083 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 08:00:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:55,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:00:55,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:00:55,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:00:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:00:56,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877997833] [2022-01-10 08:00:56,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877997833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:00:56,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:00:56,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 08:00:56,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242964996] [2022-01-10 08:00:56,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:00:56,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 08:00:56,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:56,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 08:00:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 08:00:56,290 INFO L87 Difference]: Start difference. First operand 1736 states and 2828 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:56,476 INFO L93 Difference]: Finished difference Result 2433 states and 3830 transitions. [2022-01-10 08:00:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 08:00:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 08:00:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:56,482 INFO L225 Difference]: With dead ends: 2433 [2022-01-10 08:00:56,482 INFO L226 Difference]: Without dead ends: 1759 [2022-01-10 08:00:56,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-10 08:00:56,484 INFO L933 BasicCegarLoop]: 1502 mSDtfsCounter, 5831 mSDsluCounter, 9053 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5831 SdHoareTripleChecker+Valid, 10555 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:56,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5831 Valid, 10555 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 46 Unchecked, 0.0s Time] [2022-01-10 08:00:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-01-10 08:00:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1758. [2022-01-10 08:00:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1756 states have (on average 1.6252847380410023) internal successors, (2854), 1757 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 2854 transitions. [2022-01-10 08:00:56,515 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 2854 transitions. Word has length 64 [2022-01-10 08:00:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:56,515 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 2854 transitions. [2022-01-10 08:00:56,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 2854 transitions. [2022-01-10 08:00:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:00:56,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:56,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:56,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 08:00:56,734 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 08:00:56,735 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:56,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2022-01-10 08:00:56,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:56,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030663015] [2022-01-10 08:00:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:56,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:56,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:56,737 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 08:00:56,769 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 08:00:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:56,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:00:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:00:56,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:56,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:56,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030663015] [2022-01-10 08:00:56,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030663015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:56,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:56,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:00:56,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566654127] [2022-01-10 08:00:56,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:56,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:00:56,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:00:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:56,876 INFO L87 Difference]: Start difference. First operand 1758 states and 2854 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:56,912 INFO L93 Difference]: Finished difference Result 2718 states and 4220 transitions. [2022-01-10 08:00:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:00:56,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 08:00:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:56,917 INFO L225 Difference]: With dead ends: 2718 [2022-01-10 08:00:56,917 INFO L226 Difference]: Without dead ends: 1760 [2022-01-10 08:00:56,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:56,918 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 31 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:56,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-01-10 08:00:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1758. [2022-01-10 08:00:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1756 states have (on average 1.6150341685649203) internal successors, (2836), 1757 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 2836 transitions. [2022-01-10 08:00:56,950 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 2836 transitions. Word has length 64 [2022-01-10 08:00:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:56,950 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 2836 transitions. [2022-01-10 08:00:56,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 2836 transitions. [2022-01-10 08:00:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:00:56,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:56,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:56,959 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 08:00:57,163 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 08:00:57,164 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2129817016, now seen corresponding path program 1 times [2022-01-10 08:00:57,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:57,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669392961] [2022-01-10 08:00:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:57,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:57,166 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 08:00:57,168 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 08:00:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:00:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:00:58,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:00:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:00:58,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:58,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669392961] [2022-01-10 08:00:58,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669392961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:00:58,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:00:58,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 08:00:58,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660065541] [2022-01-10 08:00:58,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:00:58,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 08:00:58,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 08:00:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 08:00:58,723 INFO L87 Difference]: Start difference. First operand 1758 states and 2836 transitions. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:59,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:59,040 INFO L93 Difference]: Finished difference Result 2487 states and 3861 transitions. [2022-01-10 08:00:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 08:00:59,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 08:00:59,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:59,046 INFO L225 Difference]: With dead ends: 2487 [2022-01-10 08:00:59,046 INFO L226 Difference]: Without dead ends: 1813 [2022-01-10 08:00:59,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-10 08:00:59,048 INFO L933 BasicCegarLoop]: 1501 mSDtfsCounter, 7285 mSDsluCounter, 9126 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7285 SdHoareTripleChecker+Valid, 10627 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:59,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7285 Valid, 10627 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-01-10 08:00:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-01-10 08:00:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1768. [2022-01-10 08:00:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1766 states have (on average 1.6126840317100792) internal successors, (2848), 1767 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 2848 transitions. [2022-01-10 08:00:59,084 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 2848 transitions. Word has length 64 [2022-01-10 08:00:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:59,084 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 2848 transitions. [2022-01-10 08:00:59,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 2848 transitions. [2022-01-10 08:00:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:00:59,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:59,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:59,123 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 08:00:59,291 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 08:00:59,292 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1514914168, now seen corresponding path program 1 times [2022-01-10 08:00:59,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574895145] [2022-01-10 08:00:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:59,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:59,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:59,294 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 08:00:59,295 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 08:00:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:59,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:00:59,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:00:59,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:59,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:59,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574895145] [2022-01-10 08:00:59,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574895145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:59,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:59,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:00:59,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277748959] [2022-01-10 08:00:59,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:59,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:00:59,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:00:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:59,445 INFO L87 Difference]: Start difference. First operand 1768 states and 2848 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:59,477 INFO L93 Difference]: Finished difference Result 2128 states and 3353 transitions. [2022-01-10 08:00:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:00:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 08:00:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:59,481 INFO L225 Difference]: With dead ends: 2128 [2022-01-10 08:00:59,481 INFO L226 Difference]: Without dead ends: 1170 [2022-01-10 08:00:59,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:59,484 INFO L933 BasicCegarLoop]: 1533 mSDtfsCounter, 25 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3033 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:59,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 3033 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-01-10 08:00:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1162. [2022-01-10 08:00:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1160 states have (on average 1.7163793103448275) internal successors, (1991), 1161 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1991 transitions. [2022-01-10 08:00:59,507 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1991 transitions. Word has length 64 [2022-01-10 08:00:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:59,507 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1991 transitions. [2022-01-10 08:00:59,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:00:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1991 transitions. [2022-01-10 08:00:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:00:59,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:59,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:59,524 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 08:00:59,717 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 08:00:59,717 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:59,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2009059564, now seen corresponding path program 1 times [2022-01-10 08:00:59,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445268733] [2022-01-10 08:00:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:59,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:59,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:59,724 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 08:00:59,726 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 08:00:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:59,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:00:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 08:01:00,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:00,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:00,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445268733] [2022-01-10 08:01:00,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445268733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:00,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:00,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:00,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828299619] [2022-01-10 08:01:00,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:00,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:01:00,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:00,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:01:00,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:01:00,173 INFO L87 Difference]: Start difference. First operand 1162 states and 1991 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:00,305 INFO L93 Difference]: Finished difference Result 1506 states and 2472 transitions. [2022-01-10 08:01:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:01:00,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 08:01:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:00,310 INFO L225 Difference]: With dead ends: 1506 [2022-01-10 08:01:00,310 INFO L226 Difference]: Without dead ends: 1162 [2022-01-10 08:01:00,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:01:00,312 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 1452 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 3079 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:00,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 3079 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-01-10 08:01:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-01-10 08:01:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1162. [2022-01-10 08:01:00,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1160 states have (on average 1.7155172413793103) internal successors, (1990), 1161 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1990 transitions. [2022-01-10 08:01:00,347 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1990 transitions. Word has length 64 [2022-01-10 08:01:00,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:00,347 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1990 transitions. [2022-01-10 08:01:00,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1990 transitions. [2022-01-10 08:01:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:01:00,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:00,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:00,383 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 08:01:00,586 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 08:01:00,587 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:00,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:00,587 INFO L85 PathProgramCache]: Analyzing trace with hash 740302356, now seen corresponding path program 1 times [2022-01-10 08:01:00,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:00,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343786916] [2022-01-10 08:01:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:00,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:00,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:00,603 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 08:01:00,639 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 08:01:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:01:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 08:01:00,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:00,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:00,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343786916] [2022-01-10 08:01:00,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343786916] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:00,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:00,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:00,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800569084] [2022-01-10 08:01:00,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:00,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:01:00,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:00,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:01:00,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:01:00,934 INFO L87 Difference]: Start difference. First operand 1162 states and 1990 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:00,997 INFO L93 Difference]: Finished difference Result 1510 states and 2476 transitions. [2022-01-10 08:01:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:01:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 08:01:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:01,000 INFO L225 Difference]: With dead ends: 1510 [2022-01-10 08:01:01,000 INFO L226 Difference]: Without dead ends: 1162 [2022-01-10 08:01:01,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:01:01,001 INFO L933 BasicCegarLoop]: 1509 mSDtfsCounter, 1455 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 3080 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:01,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 3080 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-10 08:01:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-01-10 08:01:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1162. [2022-01-10 08:01:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1160 states have (on average 1.714655172413793) internal successors, (1989), 1161 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1989 transitions. [2022-01-10 08:01:01,020 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1989 transitions. Word has length 64 [2022-01-10 08:01:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:01,020 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1989 transitions. [2022-01-10 08:01:01,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1989 transitions. [2022-01-10 08:01:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:01:01,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:01,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:01,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 08:01:01,227 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 08:01:01,227 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:01,227 INFO L85 PathProgramCache]: Analyzing trace with hash -261059308, now seen corresponding path program 1 times [2022-01-10 08:01:01,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:01,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182156440] [2022-01-10 08:01:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:01,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:01,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:01,229 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 08:01:01,231 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 08:01:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:01:01,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 08:01:01,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:01,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:01,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182156440] [2022-01-10 08:01:01,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182156440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:01,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:01,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:01,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733668995] [2022-01-10 08:01:01,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:01,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:01:01,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:01,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:01:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:01:01,514 INFO L87 Difference]: Start difference. First operand 1162 states and 1989 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:01,569 INFO L93 Difference]: Finished difference Result 1500 states and 2464 transitions. [2022-01-10 08:01:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:01:01,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 08:01:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:01,573 INFO L225 Difference]: With dead ends: 1500 [2022-01-10 08:01:01,573 INFO L226 Difference]: Without dead ends: 1148 [2022-01-10 08:01:01,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:01:01,574 INFO L933 BasicCegarLoop]: 1512 mSDtfsCounter, 1457 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 3078 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:01,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 3078 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-10 08:01:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-01-10 08:01:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1148. [2022-01-10 08:01:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1146 states have (on average 1.7207678883071553) internal successors, (1972), 1147 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1972 transitions. [2022-01-10 08:01:01,591 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1972 transitions. Word has length 64 [2022-01-10 08:01:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:01,592 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 1972 transitions. [2022-01-10 08:01:01,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1972 transitions. [2022-01-10 08:01:01,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:01:01,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:01,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:01,599 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 08:01:01,798 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 08:01:01,799 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:01,799 INFO L85 PathProgramCache]: Analyzing trace with hash -805749704, now seen corresponding path program 1 times [2022-01-10 08:01:01,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:01,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623101129] [2022-01-10 08:01:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:01,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:01,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:01,801 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 08:01:01,803 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 08:01:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:01,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:01:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:01,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:01,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:01,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623101129] [2022-01-10 08:01:01,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623101129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:01,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:01,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:01:01,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287549375] [2022-01-10 08:01:01,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:01,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:01:01,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:01,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:01:01,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:01,944 INFO L87 Difference]: Start difference. First operand 1148 states and 1972 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:01,967 INFO L93 Difference]: Finished difference Result 1320 states and 2211 transitions. [2022-01-10 08:01:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:01:01,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 08:01:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:01,970 INFO L225 Difference]: With dead ends: 1320 [2022-01-10 08:01:01,970 INFO L226 Difference]: Without dead ends: 982 [2022-01-10 08:01:01,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:01,971 INFO L933 BasicCegarLoop]: 1527 mSDtfsCounter, 22 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3015 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:01,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 3015 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:01:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-01-10 08:01:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 980. [2022-01-10 08:01:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 978 states have (on average 1.770961145194274) internal successors, (1732), 979 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1732 transitions. [2022-01-10 08:01:01,995 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1732 transitions. Word has length 65 [2022-01-10 08:01:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:01,996 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 1732 transitions. [2022-01-10 08:01:01,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1732 transitions. [2022-01-10 08:01:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:01:01,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:01,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:02,004 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 08:01:02,204 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 08:01:02,204 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:02,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2023735102, now seen corresponding path program 1 times [2022-01-10 08:01:02,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:02,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405437902] [2022-01-10 08:01:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:02,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:02,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:02,206 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 08:01:02,215 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 08:01:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:02,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:01:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:03,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:01:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:03,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:03,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405437902] [2022-01-10 08:01:03,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405437902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:01:03,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:01:03,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 08:01:03,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616790168] [2022-01-10 08:01:03,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:01:03,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 08:01:03,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:03,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 08:01:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 08:01:03,526 INFO L87 Difference]: Start difference. First operand 980 states and 1732 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:03,789 INFO L93 Difference]: Finished difference Result 1162 states and 1985 transitions. [2022-01-10 08:01:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 08:01:03,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 08:01:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:03,793 INFO L225 Difference]: With dead ends: 1162 [2022-01-10 08:01:03,793 INFO L226 Difference]: Without dead ends: 992 [2022-01-10 08:01:03,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 08:01:03,795 INFO L933 BasicCegarLoop]: 1500 mSDtfsCounter, 7294 mSDsluCounter, 10541 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7294 SdHoareTripleChecker+Valid, 12041 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:03,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7294 Valid, 12041 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-01-10 08:01:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-01-10 08:01:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 992. [2022-01-10 08:01:03,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 990 states have (on average 1.7656565656565657) internal successors, (1748), 991 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1748 transitions. [2022-01-10 08:01:03,824 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1748 transitions. Word has length 65 [2022-01-10 08:01:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:03,824 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1748 transitions. [2022-01-10 08:01:03,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1748 transitions. [2022-01-10 08:01:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:01:03,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:03,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:03,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 08:01:04,035 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 08:01:04,036 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash -94088951, now seen corresponding path program 1 times [2022-01-10 08:01:04,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:04,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630632198] [2022-01-10 08:01:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:04,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:04,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:04,052 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 08:01:04,101 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 08:01:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:01:04,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 08:01:04,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:04,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:04,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630632198] [2022-01-10 08:01:04,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630632198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:04,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:04,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:04,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114029957] [2022-01-10 08:01:04,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:04,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:01:04,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:04,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:01:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:04,477 INFO L87 Difference]: Start difference. First operand 992 states and 1748 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:04,557 INFO L93 Difference]: Finished difference Result 1228 states and 2070 transitions. [2022-01-10 08:01:04,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:01:04,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 08:01:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:04,560 INFO L225 Difference]: With dead ends: 1228 [2022-01-10 08:01:04,560 INFO L226 Difference]: Without dead ends: 1058 [2022-01-10 08:01:04,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:04,561 INFO L933 BasicCegarLoop]: 1569 mSDtfsCounter, 3058 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3058 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:04,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3058 Valid, 3182 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:01:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-01-10 08:01:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 992. [2022-01-10 08:01:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 990 states have (on average 1.7595959595959596) internal successors, (1742), 991 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1742 transitions. [2022-01-10 08:01:04,577 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1742 transitions. Word has length 66 [2022-01-10 08:01:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:04,577 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1742 transitions. [2022-01-10 08:01:04,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1742 transitions. [2022-01-10 08:01:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:01:04,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:04,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:04,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 08:01:04,784 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 08:01:04,784 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1408270156, now seen corresponding path program 1 times [2022-01-10 08:01:04,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:04,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917938120] [2022-01-10 08:01:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:04,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:04,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:04,786 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 08:01:04,787 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 08:01:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:04,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:01:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 08:01:05,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:05,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:05,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917938120] [2022-01-10 08:01:05,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917938120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:05,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:05,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:05,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549336346] [2022-01-10 08:01:05,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:05,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:01:05,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:01:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:05,142 INFO L87 Difference]: Start difference. First operand 992 states and 1742 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:05,224 INFO L93 Difference]: Finished difference Result 1172 states and 1990 transitions. [2022-01-10 08:01:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:01:05,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 08:01:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:05,227 INFO L225 Difference]: With dead ends: 1172 [2022-01-10 08:01:05,227 INFO L226 Difference]: Without dead ends: 1114 [2022-01-10 08:01:05,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:05,228 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 3056 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3056 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:05,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3056 Valid, 3187 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:01:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-01-10 08:01:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1052. [2022-01-10 08:01:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1050 states have (on average 1.7333333333333334) internal successors, (1820), 1051 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1820 transitions. [2022-01-10 08:01:05,258 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1820 transitions. Word has length 66 [2022-01-10 08:01:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:05,259 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1820 transitions. [2022-01-10 08:01:05,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1820 transitions. [2022-01-10 08:01:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:01:05,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:05,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:05,268 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 08:01:05,466 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 08:01:05,466 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 52806377, now seen corresponding path program 1 times [2022-01-10 08:01:05,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:05,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593979465] [2022-01-10 08:01:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:05,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:05,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:05,468 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 08:01:05,481 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 08:01:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:05,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:01:05,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:01:05,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:05,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:05,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593979465] [2022-01-10 08:01:05,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593979465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:05,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:05,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:05,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066920827] [2022-01-10 08:01:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:05,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:01:05,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:05,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:01:05,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:05,930 INFO L87 Difference]: Start difference. First operand 1052 states and 1820 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:06,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:06,010 INFO L93 Difference]: Finished difference Result 1232 states and 2068 transitions. [2022-01-10 08:01:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:01:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 08:01:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:06,026 INFO L225 Difference]: With dead ends: 1232 [2022-01-10 08:01:06,026 INFO L226 Difference]: Without dead ends: 1174 [2022-01-10 08:01:06,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:06,029 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 3055 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3055 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:06,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3055 Valid, 3181 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:01:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-01-10 08:01:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1112. [2022-01-10 08:01:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1110 states have (on average 1.70990990990991) internal successors, (1898), 1111 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1898 transitions. [2022-01-10 08:01:06,061 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1898 transitions. Word has length 66 [2022-01-10 08:01:06,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:06,061 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1898 transitions. [2022-01-10 08:01:06,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1898 transitions. [2022-01-10 08:01:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 08:01:06,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:06,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:06,073 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 08:01:06,270 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 08:01:06,271 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:06,271 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2022-01-10 08:01:06,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:06,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088802084] [2022-01-10 08:01:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:06,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:06,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:06,273 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 08:01:06,274 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 08:01:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 08:01:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:08,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:01:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:10,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:10,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088802084] [2022-01-10 08:01:10,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088802084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:01:10,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:01:10,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-01-10 08:01:10,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266674340] [2022-01-10 08:01:10,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:01:10,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 08:01:10,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 08:01:10,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 08:01:10,348 INFO L87 Difference]: Start difference. First operand 1112 states and 1898 transitions. Second operand has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:11,366 INFO L93 Difference]: Finished difference Result 1359 states and 2215 transitions. [2022-01-10 08:01:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 08:01:11,366 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 08:01:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:11,368 INFO L225 Difference]: With dead ends: 1359 [2022-01-10 08:01:11,368 INFO L226 Difference]: Without dead ends: 1241 [2022-01-10 08:01:11,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 08:01:11,369 INFO L933 BasicCegarLoop]: 1520 mSDtfsCounter, 18883 mSDsluCounter, 12438 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18883 SdHoareTripleChecker+Valid, 13958 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:11,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18883 Valid, 13958 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 287 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-01-10 08:01:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2022-01-10 08:01:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1118. [2022-01-10 08:01:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1116 states have (on average 1.706989247311828) internal successors, (1905), 1117 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1905 transitions. [2022-01-10 08:01:11,389 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1905 transitions. Word has length 67 [2022-01-10 08:01:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:11,389 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 1905 transitions. [2022-01-10 08:01:11,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1905 transitions. [2022-01-10 08:01:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 08:01:11,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:11,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:11,398 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 08:01:11,596 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 08:01:11,596 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash 138650479, now seen corresponding path program 1 times [2022-01-10 08:01:11,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:11,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387159301] [2022-01-10 08:01:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:11,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:11,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:11,598 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 08:01:11,599 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 08:01:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 08:01:11,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:13,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:01:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:14,263 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:14,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387159301] [2022-01-10 08:01:14,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387159301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:01:14,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:01:14,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2022-01-10 08:01:14,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709059859] [2022-01-10 08:01:14,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:01:14,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 08:01:14,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 08:01:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 08:01:14,264 INFO L87 Difference]: Start difference. First operand 1118 states and 1905 transitions. Second operand has 35 states, 35 states have (on average 3.5142857142857142) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:15,122 INFO L93 Difference]: Finished difference Result 1367 states and 2222 transitions. [2022-01-10 08:01:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 08:01:15,124 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5142857142857142) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 08:01:15,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:15,127 INFO L225 Difference]: With dead ends: 1367 [2022-01-10 08:01:15,127 INFO L226 Difference]: Without dead ends: 1239 [2022-01-10 08:01:15,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=1142, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 08:01:15,129 INFO L933 BasicCegarLoop]: 1521 mSDtfsCounter, 5874 mSDsluCounter, 21212 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5874 SdHoareTripleChecker+Valid, 22733 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:15,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5874 Valid, 22733 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 281 Invalid, 0 Unknown, 93 Unchecked, 0.4s Time] [2022-01-10 08:01:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-01-10 08:01:15,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1104. [2022-01-10 08:01:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1102 states have (on average 1.7132486388384756) internal successors, (1888), 1103 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1888 transitions. [2022-01-10 08:01:15,162 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1888 transitions. Word has length 67 [2022-01-10 08:01:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:15,162 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1888 transitions. [2022-01-10 08:01:15,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5142857142857142) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1888 transitions. [2022-01-10 08:01:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 08:01:15,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:15,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:15,185 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 08:01:15,372 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 08:01:15,372 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash 531431905, now seen corresponding path program 1 times [2022-01-10 08:01:15,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:15,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598218693] [2022-01-10 08:01:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:15,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:15,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:15,376 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 08:01:15,378 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 08:01:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:15,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:01:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:15,593 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 08:01:15,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:15,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:15,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598218693] [2022-01-10 08:01:15,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598218693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:15,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:15,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:01:15,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939828647] [2022-01-10 08:01:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:15,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:01:15,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:01:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:15,595 INFO L87 Difference]: Start difference. First operand 1104 states and 1888 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)