/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:54:43,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:54:43,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:54:43,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 04:54:43,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 04:54:43,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 04:54:43,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 04:54:43,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 04:54:43,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 04:54:43,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 04:54:43,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 04:54:43,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 04:54:43,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 04:54:43,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 04:54:43,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 04:54:43,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 04:54:43,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 04:54:43,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 04:54:43,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 04:54:43,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 04:54:43,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 04:54:43,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 04:54:43,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 04:54:43,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 04:54:43,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 04:54:43,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:54:43,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:54:43,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:54:43,845 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 04:54:43,879 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:54:43,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:54:43,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:54:43,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:54:43,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:54:43,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:54:43,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:54:43,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:54:43,881 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:54:43,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:54:43,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:54:43,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:54:43,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:54:43,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:54:43,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:54:43,883 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:54:43,883 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:54:43,883 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:54:43,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:54:43,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:54:43,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:54:43,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:54:43,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:54:43,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:54:43,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:54:43,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:54:43,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:54:43,884 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:54:43,885 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:54:43,885 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:54:43,885 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:54:43,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:54:43,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:54:43,885 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:54:44,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:54:44,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:54:44,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:54:44,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:54:44,130 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:54:44,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label26.c [2022-01-10 04:54:44,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ac4c3571/3bf0ea6028e34563b5f7c5273645de84/FLAGc96b89206 [2022-01-10 04:54:44,653 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:54:44,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label26.c [2022-01-10 04:54:44,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ac4c3571/3bf0ea6028e34563b5f7c5273645de84/FLAGc96b89206 [2022-01-10 04:54:45,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ac4c3571/3bf0ea6028e34563b5f7c5273645de84 [2022-01-10 04:54:45,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:54:45,164 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:54:45,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:54:45,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:54:45,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:54:45,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b85755d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45, skipping insertion in model container [2022-01-10 04:54:45,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:54:45,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:54:45,396 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label26.c[2078,2091] [2022-01-10 04:54:45,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:54:45,538 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:54:45,552 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label26.c[2078,2091] [2022-01-10 04:54:45,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:54:45,689 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:54:45,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45 WrapperNode [2022-01-10 04:54:45,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:54:45,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:54:45,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:54:45,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:54:45,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,767 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 595 [2022-01-10 04:54:45,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:54:45,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:54:45,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:54:45,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:54:45,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:54:45,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:54:45,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:54:45,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:54:45,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (1/1) ... [2022-01-10 04:54:45,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:54:45,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:54:45,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 04:54:45,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 04:54:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:54:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:54:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:54:45,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:54:45,982 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:54:45,983 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:54:48,143 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:54:48,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:54:48,150 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 04:54:48,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:54:48 BoogieIcfgContainer [2022-01-10 04:54:48,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:54:48,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:54:48,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:54:48,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:54:48,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:54:45" (1/3) ... [2022-01-10 04:54:48,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1b8e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:54:48, skipping insertion in model container [2022-01-10 04:54:48,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:54:45" (2/3) ... [2022-01-10 04:54:48,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1b8e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:54:48, skipping insertion in model container [2022-01-10 04:54:48,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:54:48" (3/3) ... [2022-01-10 04:54:48,160 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label26.c [2022-01-10 04:54:48,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:54:48,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:54:48,217 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:54:48,228 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 04:54:48,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:54:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 204 states have (on average 1.6862745098039216) internal successors, (344), 205 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:54:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 04:54:48,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:54:48,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:54:48,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:54:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:54:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1657508526, now seen corresponding path program 1 times [2022-01-10 04:54:48,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:54:48,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561632594] [2022-01-10 04:54:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:54:48,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:54:48,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:54:48,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:54:48,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 04:54:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:54:48,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:54:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:54:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:54:48,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:54:48,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:54:48,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561632594] [2022-01-10 04:54:48,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561632594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:54:48,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:54:48,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:54:48,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531198057] [2022-01-10 04:54:48,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:54:48,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:54:48,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:54:48,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:54:48,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:54:48,501 INFO L87 Difference]: Start difference. First operand has 206 states, 204 states have (on average 1.6862745098039216) internal successors, (344), 205 states have internal predecessors, (344), 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 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:54:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:54:50,650 INFO L93 Difference]: Finished difference Result 567 states and 981 transitions. [2022-01-10 04:54:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:54:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 16 [2022-01-10 04:54:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:54:50,661 INFO L225 Difference]: With dead ends: 567 [2022-01-10 04:54:50,661 INFO L226 Difference]: Without dead ends: 282 [2022-01-10 04:54:50,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:54:50,667 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 146 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:54:50,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 103 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 04:54:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-10 04:54:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-01-10 04:54:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.395017793594306) internal successors, (392), 281 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:54:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 392 transitions. [2022-01-10 04:54:50,712 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 392 transitions. Word has length 16 [2022-01-10 04:54:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:54:50,712 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 392 transitions. [2022-01-10 04:54:50,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:54:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 392 transitions. [2022-01-10 04:54:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 04:54:50,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:54:50,715 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:54:50,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 04:54:50,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:54:50,924 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:54:50,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:54:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash -663738786, now seen corresponding path program 1 times [2022-01-10 04:54:50,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:54:50,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583589570] [2022-01-10 04:54:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:54:50,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:54:50,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:54:50,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:54:50,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 04:54:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:54:50,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:54:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:54:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:54:51,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:54:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:54:53,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:54:53,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583589570] [2022-01-10 04:54:53,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583589570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:54:53,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:54:53,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-01-10 04:54:53,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100600884] [2022-01-10 04:54:53,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:54:53,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 04:54:53,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:54:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 04:54:53,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 04:54:53,459 INFO L87 Difference]: Start difference. First operand 282 states and 392 transitions. Second operand has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:55:10,453 INFO L93 Difference]: Finished difference Result 842 states and 1254 transitions. [2022-01-10 04:55:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 04:55:10,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 5 states have internal predecessors, (163), 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 82 [2022-01-10 04:55:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:55:10,462 INFO L225 Difference]: With dead ends: 842 [2022-01-10 04:55:10,462 INFO L226 Difference]: Without dead ends: 701 [2022-01-10 04:55:10,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 04:55:10,464 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 892 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:55:10,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 51 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 16.8s Time] [2022-01-10 04:55:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-10 04:55:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 699. [2022-01-10 04:55:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 1.3968481375358166) internal successors, (975), 698 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 975 transitions. [2022-01-10 04:55:10,493 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 975 transitions. Word has length 82 [2022-01-10 04:55:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:55:10,494 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 975 transitions. [2022-01-10 04:55:10,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:10,494 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 975 transitions. [2022-01-10 04:55:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 04:55:10,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:55:10,496 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:55:10,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 04:55:10,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:55:10,697 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:55:10,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:55:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash -336030316, now seen corresponding path program 1 times [2022-01-10 04:55:10,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:55:10,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283000428] [2022-01-10 04:55:10,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:55:10,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:55:10,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:55:10,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:55:10,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 04:55:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:55:10,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:55:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:55:10,929 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 04:55:10,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:55:10,930 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:55:10,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283000428] [2022-01-10 04:55:10,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283000428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:55:10,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:55:10,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:55:10,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695953992] [2022-01-10 04:55:10,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:55:10,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:55:10,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:55:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:55:10,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:55:10,932 INFO L87 Difference]: Start difference. First operand 699 states and 975 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:55:13,215 INFO L93 Difference]: Finished difference Result 1813 states and 2577 transitions. [2022-01-10 04:55:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:55:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 86 [2022-01-10 04:55:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:55:13,222 INFO L225 Difference]: With dead ends: 1813 [2022-01-10 04:55:13,222 INFO L226 Difference]: Without dead ends: 1116 [2022-01-10 04:55:13,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:55:13,224 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 75 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 04:55:13,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 77 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 04:55:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-01-10 04:55:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 838. [2022-01-10 04:55:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.3249701314217444) internal successors, (1109), 837 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1109 transitions. [2022-01-10 04:55:13,244 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1109 transitions. Word has length 86 [2022-01-10 04:55:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:55:13,245 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1109 transitions. [2022-01-10 04:55:13,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1109 transitions. [2022-01-10 04:55:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 04:55:13,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:55:13,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:55:13,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 04:55:13,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:55:13,456 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:55:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:55:13,457 INFO L85 PathProgramCache]: Analyzing trace with hash -551599636, now seen corresponding path program 1 times [2022-01-10 04:55:13,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:55:13,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328940473] [2022-01-10 04:55:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:55:13,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:55:13,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:55:13,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:55:13,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 04:55:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:55:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:55:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:55:13,670 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 04:55:13,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:55:13,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:55:13,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328940473] [2022-01-10 04:55:13,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328940473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:55:13,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:55:13,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:55:13,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666801551] [2022-01-10 04:55:13,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:55:13,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:55:13,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:55:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:55:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:55:13,672 INFO L87 Difference]: Start difference. First operand 838 states and 1109 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:55:16,001 INFO L93 Difference]: Finished difference Result 1952 states and 2686 transitions. [2022-01-10 04:55:16,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:55:16,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2022-01-10 04:55:16,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:55:16,005 INFO L225 Difference]: With dead ends: 1952 [2022-01-10 04:55:16,005 INFO L226 Difference]: Without dead ends: 838 [2022-01-10 04:55:16,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:55:16,007 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 126 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 04:55:16,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 226 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 04:55:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-10 04:55:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 838. [2022-01-10 04:55:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.2879330943847074) internal successors, (1078), 837 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1078 transitions. [2022-01-10 04:55:16,022 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1078 transitions. Word has length 91 [2022-01-10 04:55:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:55:16,022 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1078 transitions. [2022-01-10 04:55:16,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1078 transitions. [2022-01-10 04:55:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 04:55:16,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:55:16,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:55:16,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 04:55:16,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:55:16,234 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:55:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:55:16,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1607838268, now seen corresponding path program 1 times [2022-01-10 04:55:16,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:55:16,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581276913] [2022-01-10 04:55:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:55:16,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:55:16,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:55:16,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:55:16,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 04:55:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:55:16,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:55:16,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:55:16,505 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 04:55:16,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:55:16,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:55:16,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581276913] [2022-01-10 04:55:16,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581276913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:55:16,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:55:16,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:55:16,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202454146] [2022-01-10 04:55:16,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:55:16,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:55:16,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:55:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:55:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:55:16,508 INFO L87 Difference]: Start difference. First operand 838 states and 1078 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:55:18,312 INFO L93 Difference]: Finished difference Result 1952 states and 2601 transitions. [2022-01-10 04:55:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:55:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 107 [2022-01-10 04:55:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:55:18,317 INFO L225 Difference]: With dead ends: 1952 [2022-01-10 04:55:18,318 INFO L226 Difference]: Without dead ends: 1394 [2022-01-10 04:55:18,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:55:18,319 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 85 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:55:18,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 34 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 04:55:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-01-10 04:55:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1394. [2022-01-10 04:55:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 1.2555635319454415) internal successors, (1749), 1393 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1749 transitions. [2022-01-10 04:55:18,343 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1749 transitions. Word has length 107 [2022-01-10 04:55:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:55:18,343 INFO L470 AbstractCegarLoop]: Abstraction has 1394 states and 1749 transitions. [2022-01-10 04:55:18,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1749 transitions. [2022-01-10 04:55:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 04:55:18,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:55:18,346 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:55:18,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 04:55:18,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:55:18,558 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:55:18,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:55:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash 908163385, now seen corresponding path program 1 times [2022-01-10 04:55:18,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:55:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211883089] [2022-01-10 04:55:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:55:18,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:55:18,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:55:18,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:55:18,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 04:55:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:55:18,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:55:18,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:55:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-01-10 04:55:18,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:55:18,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:55:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211883089] [2022-01-10 04:55:18,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211883089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:55:18,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:55:18,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:55:18,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360755190] [2022-01-10 04:55:18,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:55:18,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:55:18,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:55:18,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:55:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:55:18,971 INFO L87 Difference]: Start difference. First operand 1394 states and 1749 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:20,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:55:20,652 INFO L93 Difference]: Finished difference Result 2925 states and 3751 transitions. [2022-01-10 04:55:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:55:20,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 195 [2022-01-10 04:55:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:55:20,662 INFO L225 Difference]: With dead ends: 2925 [2022-01-10 04:55:20,662 INFO L226 Difference]: Without dead ends: 1811 [2022-01-10 04:55:20,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:55:20,665 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 132 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-10 04:55:20,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 194 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-10 04:55:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-01-10 04:55:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1811. [2022-01-10 04:55:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 1.2005524861878454) internal successors, (2173), 1810 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2173 transitions. [2022-01-10 04:55:20,697 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2173 transitions. Word has length 195 [2022-01-10 04:55:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:55:20,697 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2173 transitions. [2022-01-10 04:55:20,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2173 transitions. [2022-01-10 04:55:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-10 04:55:20,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:55:20,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:55:20,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 04:55:20,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:55:20,920 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:55:20,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:55:20,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1614484285, now seen corresponding path program 1 times [2022-01-10 04:55:20,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:55:20,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018994468] [2022-01-10 04:55:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:55:20,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:55:20,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:55:20,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:55:20,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 04:55:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:55:21,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:55:21,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:55:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 41 proven. 177 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-10 04:55:21,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:55:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-10 04:55:28,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:55:28,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018994468] [2022-01-10 04:55:28,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018994468] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 04:55:28,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 04:55:28,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 04:55:28,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868663974] [2022-01-10 04:55:28,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:55:28,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 04:55:28,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:55:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 04:55:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 04:55:28,772 INFO L87 Difference]: Start difference. First operand 1811 states and 2173 transitions. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:55:54,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []