/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/Problem15_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 05:20:55,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 05:20:55,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 05:20:55,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 05:20:55,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 05:20:55,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 05:20:55,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 05:20:55,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 05:20:55,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 05:20:55,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 05:20:55,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 05:20:55,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 05:20:55,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 05:20:55,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 05:20:55,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 05:20:55,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 05:20:55,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 05:20:55,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 05:20:55,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 05:20:55,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 05:20:55,602 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 05:20:55,632 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 05:20:55,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 05:20:55,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 05:20:55,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 05:20:55,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 05:20:55,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 05:20:55,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 05:20:55,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 05:20:55,633 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 05:20:55,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 05:20:55,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 05:20:55,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 05:20:55,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 05:20:55,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 05:20:55,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 05:20:55,634 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 05:20:55,634 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 05:20:55,635 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 05:20:55,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 05:20:55,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 05:20:55,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 05:20:55,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 05:20:55,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 05:20:55,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:20:55,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 05:20:55,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 05:20:55,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 05:20:55,639 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 05:20:55,639 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 05:20:55,640 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 05:20:55,640 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 05:20:55,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 05:20:55,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 05:20:55,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 05:20:55,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 05:20:55,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 05:20:55,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 05:20:55,885 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 05:20:55,887 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 05:20:55,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label10.c [2022-01-10 05:20:55,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7765fc2b2/8463ac2f8ac943cc912109e10a313d17/FLAG820003142 [2022-01-10 05:20:56,487 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 05:20:56,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label10.c [2022-01-10 05:20:56,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7765fc2b2/8463ac2f8ac943cc912109e10a313d17/FLAG820003142 [2022-01-10 05:20:56,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7765fc2b2/8463ac2f8ac943cc912109e10a313d17 [2022-01-10 05:20:56,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 05:20:56,918 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 05:20:56,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 05:20:56,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 05:20:56,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 05:20:56,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:20:56" (1/1) ... [2022-01-10 05:20:56,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7c5f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:56, skipping insertion in model container [2022-01-10 05:20:56,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:20:56" (1/1) ... [2022-01-10 05:20:56,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 05:20:57,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 05:20:57,251 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/Problem15_label10.c[4275,4288] [2022-01-10 05:20:57,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:20:57,656 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 05:20:57,672 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/Problem15_label10.c[4275,4288] [2022-01-10 05:20:57,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:20:57,936 INFO L208 MainTranslator]: Completed translation [2022-01-10 05:20:57,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57 WrapperNode [2022-01-10 05:20:57,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 05:20:57,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 05:20:57,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 05:20:57,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 05:20:57,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:57,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:58,063 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1755 [2022-01-10 05:20:58,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 05:20:58,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 05:20:58,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 05:20:58,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 05:20:58,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:58,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:58,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:58,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:58,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:58,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:58,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:58,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 05:20:58,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 05:20:58,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 05:20:58,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 05:20:58,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (1/1) ... [2022-01-10 05:20:58,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:20:58,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 05:20:58,216 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 05:20:58,229 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 05:20:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 05:20:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 05:20:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 05:20:58,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 05:20:58,327 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 05:20:58,328 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 05:21:12,021 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 05:21:12,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 05:21:12,032 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 05:21:12,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:21:12 BoogieIcfgContainer [2022-01-10 05:21:12,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 05:21:12,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 05:21:12,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 05:21:12,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 05:21:12,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:20:56" (1/3) ... [2022-01-10 05:21:12,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4497dd35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:21:12, skipping insertion in model container [2022-01-10 05:21:12,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:20:57" (2/3) ... [2022-01-10 05:21:12,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4497dd35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:21:12, skipping insertion in model container [2022-01-10 05:21:12,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:21:12" (3/3) ... [2022-01-10 05:21:12,051 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label10.c [2022-01-10 05:21:12,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 05:21:12,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 05:21:12,088 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 05:21:12,094 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 05:21:12,094 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 05:21:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 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 05:21:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 05:21:12,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:21:12,125 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] [2022-01-10 05:21:12,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:21:12,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:21:12,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1089129850, now seen corresponding path program 1 times [2022-01-10 05:21:12,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:21:12,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202181126] [2022-01-10 05:21:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:21:12,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:21:12,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:21:12,147 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 05:21:12,148 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 05:21:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:21:12,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:21:12,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:21:12,410 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 05:21:12,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:21:12,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:21:12,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202181126] [2022-01-10 05:21:12,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202181126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:21:12,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:21:12,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:21:12,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35463533] [2022-01-10 05:21:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:21:12,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:21:12,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:21:12,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:21:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:21:12,455 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 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 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 05:21:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:21:30,619 INFO L93 Difference]: Finished difference Result 1153 states and 2105 transitions. [2022-01-10 05:21:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:21:30,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 34 [2022-01-10 05:21:30,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:21:30,635 INFO L225 Difference]: With dead ends: 1153 [2022-01-10 05:21:30,635 INFO L226 Difference]: Without dead ends: 664 [2022-01-10 05:21:30,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 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 05:21:30,642 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 286 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:21:30,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time] [2022-01-10 05:21:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-10 05:21:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 662. [2022-01-10 05:21:30,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.4826021180030258) internal successors, (980), 661 states have internal predecessors, (980), 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 05:21:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 980 transitions. [2022-01-10 05:21:30,730 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 980 transitions. Word has length 34 [2022-01-10 05:21:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:21:30,730 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 980 transitions. [2022-01-10 05:21:30,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 05:21:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 980 transitions. [2022-01-10 05:21:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 05:21:30,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:21:30,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-01-10 05:21:30,745 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 05:21:30,942 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 05:21:30,943 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:21:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:21:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash 513841653, now seen corresponding path program 1 times [2022-01-10 05:21:30,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:21:30,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571968452] [2022-01-10 05:21:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:21:30,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:21:30,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:21:30,947 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 05:21:30,949 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 05:21:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:21:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:21:31,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:21:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:21:31,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:21:31,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:21:31,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571968452] [2022-01-10 05:21:31,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571968452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:21:31,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:21:31,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:21:31,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691711424] [2022-01-10 05:21:31,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:21:31,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:21:31,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:21:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:21:31,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:21:31,333 INFO L87 Difference]: Start difference. First operand 662 states and 980 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 05:21:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:21:49,324 INFO L93 Difference]: Finished difference Result 1927 states and 2854 transitions. [2022-01-10 05:21:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:21:49,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 99 [2022-01-10 05:21:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:21:49,330 INFO L225 Difference]: With dead ends: 1927 [2022-01-10 05:21:49,330 INFO L226 Difference]: Without dead ends: 1267 [2022-01-10 05:21:49,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 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 05:21:49,332 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 261 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2022-01-10 05:21:49,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 318 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 17.9s Time] [2022-01-10 05:21:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-10 05:21:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2022-01-10 05:21:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.3045886075949367) internal successors, (1649), 1264 states have internal predecessors, (1649), 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 05:21:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1649 transitions. [2022-01-10 05:21:49,367 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1649 transitions. Word has length 99 [2022-01-10 05:21:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:21:49,367 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1649 transitions. [2022-01-10 05:21:49,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 05:21:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1649 transitions. [2022-01-10 05:21:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-10 05:21:49,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:21:49,373 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 05:21:49,385 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 05:21:49,579 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 05:21:49,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:21:49,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:21:49,580 INFO L85 PathProgramCache]: Analyzing trace with hash 527806185, now seen corresponding path program 1 times [2022-01-10 05:21:49,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:21:49,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011146213] [2022-01-10 05:21:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:21:49,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:21:49,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:21:49,583 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 05:21:49,588 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 05:21:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:21:49,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 05:21:49,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:21:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:21:51,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:21:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:21:53,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:21:53,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011146213] [2022-01-10 05:21:53,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011146213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:21:53,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:21:53,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-01-10 05:21:53,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746643987] [2022-01-10 05:21:53,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:21:53,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 05:21:53,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:21:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 05:21:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 05:21:53,251 INFO L87 Difference]: Start difference. First operand 1265 states and 1649 transitions. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 5 states have internal predecessors, (325), 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)