/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:50:10,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:50:10,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:50:10,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:50:10,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:50:10,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:50:10,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:50:10,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:50:10,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:50:10,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:50:10,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:50:10,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:50:10,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:50:10,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:50:10,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:50:10,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:50:11,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:50:11,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:50:11,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:50:11,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:50:11,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:50:11,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:50:11,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:50:11,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:50:11,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:50:11,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:50:11,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:50:11,035 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:50:11,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:50:11,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:50:11,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:50:11,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:50:11,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:50:11,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:50:11,036 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:50:11,036 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:50:11,036 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:50:11,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:50:11,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:50:11,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:50:11,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:50:11,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:50:11,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:50:11,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:50:11,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:50:11,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:50:11,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:50:11,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:50:11,037 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:50:11,038 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:50:11,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:50:11,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:50:11,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:50:11,039 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:50:11,039 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:50:11,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:50:11,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:50:11,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:50:11,261 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:50:11,262 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:50:11,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20.c [2022-01-10 21:50:11,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbe31282e/c5bfa1851a864850bdb10323dd48924e/FLAGbac50bcda [2022-01-10 21:50:11,814 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:50:11,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label20.c [2022-01-10 21:50:11,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbe31282e/c5bfa1851a864850bdb10323dd48924e/FLAGbac50bcda [2022-01-10 21:50:12,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbe31282e/c5bfa1851a864850bdb10323dd48924e [2022-01-10 21:50:12,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:50:12,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:50:12,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:50:12,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:50:12,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:50:12,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:50:12" (1/1) ... [2022-01-10 21:50:12,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e88343c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:12, skipping insertion in model container [2022-01-10 21:50:12,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:50:12" (1/1) ... [2022-01-10 21:50:12,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:50:12,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:50:12,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label20.c[60555,60568] [2022-01-10 21:50:12,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:50:12,893 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:50:13,024 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label20.c[60555,60568] [2022-01-10 21:50:13,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:50:13,048 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:50:13,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13 WrapperNode [2022-01-10 21:50:13,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:50:13,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:50:13,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:50:13,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:50:13,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,153 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 21:50:13,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:50:13,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:50:13,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:50:13,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:50:13,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:50:13,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:50:13,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:50:13,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:50:13,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (1/1) ... [2022-01-10 21:50:13,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:50:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:50:13,269 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 21:50:13,300 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 21:50:13,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:50:13,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:50:13,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:50:13,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:50:13,415 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:50:13,416 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:50:14,907 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:50:14,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:50:14,915 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 21:50:14,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:50:14 BoogieIcfgContainer [2022-01-10 21:50:14,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:50:14,917 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:50:14,917 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:50:14,922 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:50:14,924 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:50:14" (1/1) ... [2022-01-10 21:50:15,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:50:15 BasicIcfg [2022-01-10 21:50:15,231 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:50:15,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:50:15,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:50:15,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:50:15,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:50:12" (1/4) ... [2022-01-10 21:50:15,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bab80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:50:15, skipping insertion in model container [2022-01-10 21:50:15,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:13" (2/4) ... [2022-01-10 21:50:15,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bab80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:50:15, skipping insertion in model container [2022-01-10 21:50:15,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:50:14" (3/4) ... [2022-01-10 21:50:15,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bab80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:50:15, skipping insertion in model container [2022-01-10 21:50:15,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:50:15" (4/4) ... [2022-01-10 21:50:15,235 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label20.cTransformedIcfg [2022-01-10 21:50:15,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:50:15,239 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:50:15,267 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:50:15,271 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 21:50:15,272 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:50:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:50:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 21:50:15,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:15,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:15,294 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1299265094, now seen corresponding path program 1 times [2022-01-10 21:50:15,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:15,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535903065] [2022-01-10 21:50:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:15,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:15,829 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 21:50:15,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535903065] [2022-01-10 21:50:15,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535903065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:15,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:15,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:15,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895606620] [2022-01-10 21:50:15,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:15,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:15,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:15,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:15,878 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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 21:50:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:16,946 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2022-01-10 21:50:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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 21:50:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:16,960 INFO L225 Difference]: With dead ends: 857 [2022-01-10 21:50:16,960 INFO L226 Difference]: Without dead ends: 462 [2022-01-10 21:50:16,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:16,965 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 93 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:16,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 186 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:50:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-10 21:50:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-01-10 21:50:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 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 21:50:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2022-01-10 21:50:17,006 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 195 [2022-01-10 21:50:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:17,007 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2022-01-10 21:50:17,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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 21:50:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2022-01-10 21:50:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 21:50:17,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:17,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:17,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:50:17,011 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash -882710442, now seen corresponding path program 1 times [2022-01-10 21:50:17,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113417700] [2022-01-10 21:50:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:17,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:17,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:17,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113417700] [2022-01-10 21:50:17,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113417700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:17,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:17,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:17,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133400603] [2022-01-10 21:50:17,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:17,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:17,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:17,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:17,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:17,127 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 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 21:50:18,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:18,070 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2022-01-10 21:50:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 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 203 [2022-01-10 21:50:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:18,082 INFO L225 Difference]: With dead ends: 1344 [2022-01-10 21:50:18,082 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 21:50:18,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:18,084 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:18,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 21:50:18,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2022-01-10 21:50:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 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 21:50:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2022-01-10 21:50:18,104 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 203 [2022-01-10 21:50:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:18,105 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2022-01-10 21:50:18,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 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 21:50:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2022-01-10 21:50:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-10 21:50:18,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:18,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:18,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:50:18,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2073703186, now seen corresponding path program 1 times [2022-01-10 21:50:18,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313979570] [2022-01-10 21:50:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:18,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:50:18,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:18,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313979570] [2022-01-10 21:50:18,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313979570] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:18,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:18,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:18,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543253737] [2022-01-10 21:50:18,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:18,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:18,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:18,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:18,399 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 21:50:19,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:19,471 INFO L93 Difference]: Finished difference Result 1884 states and 2886 transitions. [2022-01-10 21:50:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:19,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 210 [2022-01-10 21:50:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:19,474 INFO L225 Difference]: With dead ends: 1884 [2022-01-10 21:50:19,474 INFO L226 Difference]: Without dead ends: 842 [2022-01-10 21:50:19,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:19,476 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 331 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:19,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 47 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:50:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-10 21:50:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2022-01-10 21:50:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.3650416171224733) internal successors, (1148), 841 states have internal predecessors, (1148), 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 21:50:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1148 transitions. [2022-01-10 21:50:19,490 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1148 transitions. Word has length 210 [2022-01-10 21:50:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:19,490 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1148 transitions. [2022-01-10 21:50:19,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 21:50:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1148 transitions. [2022-01-10 21:50:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-10 21:50:19,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:19,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:19,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:50:19,493 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:19,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1692886436, now seen corresponding path program 1 times [2022-01-10 21:50:19,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:19,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327081140] [2022-01-10 21:50:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:19,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:19,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:19,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327081140] [2022-01-10 21:50:19,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327081140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:19,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:19,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:19,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179696392] [2022-01-10 21:50:19,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:19,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:19,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:19,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:19,590 INFO L87 Difference]: Start difference. First operand 842 states and 1148 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 21:50:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:20,337 INFO L93 Difference]: Finished difference Result 2496 states and 3408 transitions. [2022-01-10 21:50:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:20,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 218 [2022-01-10 21:50:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:20,342 INFO L225 Difference]: With dead ends: 2496 [2022-01-10 21:50:20,342 INFO L226 Difference]: Without dead ends: 1656 [2022-01-10 21:50:20,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:20,344 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 201 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:20,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 112 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:50:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2022-01-10 21:50:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1654. [2022-01-10 21:50:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 1.2468239564428312) internal successors, (2061), 1653 states have internal predecessors, (2061), 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 21:50:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2061 transitions. [2022-01-10 21:50:20,368 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2061 transitions. Word has length 218 [2022-01-10 21:50:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:20,368 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 2061 transitions. [2022-01-10 21:50:20,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 21:50:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2061 transitions. [2022-01-10 21:50:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-10 21:50:20,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:20,371 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:20,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:50:20,372 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash -159783573, now seen corresponding path program 1 times [2022-01-10 21:50:20,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:20,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600762581] [2022-01-10 21:50:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:20,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:20,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:20,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600762581] [2022-01-10 21:50:20,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600762581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:20,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:20,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:20,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608485969] [2022-01-10 21:50:20,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:20,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:20,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:20,495 INFO L87 Difference]: Start difference. First operand 1654 states and 2061 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:50:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:21,227 INFO L93 Difference]: Finished difference Result 4133 states and 5142 transitions. [2022-01-10 21:50:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:21,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-01-10 21:50:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:21,234 INFO L225 Difference]: With dead ends: 4133 [2022-01-10 21:50:21,234 INFO L226 Difference]: Without dead ends: 2481 [2022-01-10 21:50:21,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:21,238 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 203 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:21,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 58 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:50:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2022-01-10 21:50:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2478. [2022-01-10 21:50:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 1.2406136455389585) internal successors, (3073), 2477 states have internal predecessors, (3073), 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 21:50:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3073 transitions. [2022-01-10 21:50:21,274 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3073 transitions. Word has length 223 [2022-01-10 21:50:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:21,274 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 3073 transitions. [2022-01-10 21:50:21,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:50:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3073 transitions. [2022-01-10 21:50:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-10 21:50:21,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:21,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:21,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 21:50:21,279 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1127856333, now seen corresponding path program 1 times [2022-01-10 21:50:21,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:21,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761700669] [2022-01-10 21:50:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:21,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:21,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:21,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761700669] [2022-01-10 21:50:21,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761700669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:21,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:21,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:21,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744099107] [2022-01-10 21:50:21,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:21,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:21,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:21,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:21,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:21,398 INFO L87 Difference]: Start difference. First operand 2478 states and 3073 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 21:50:22,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:22,221 INFO L93 Difference]: Finished difference Result 7408 states and 9190 transitions. [2022-01-10 21:50:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 225 [2022-01-10 21:50:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:22,245 INFO L225 Difference]: With dead ends: 7408 [2022-01-10 21:50:22,246 INFO L226 Difference]: Without dead ends: 4932 [2022-01-10 21:50:22,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:22,250 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 222 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:22,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 121 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2022-01-10 21:50:22,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4928. [2022-01-10 21:50:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 1.2167647655774305) internal successors, (5995), 4927 states have internal predecessors, (5995), 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 21:50:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 5995 transitions. [2022-01-10 21:50:22,331 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 5995 transitions. Word has length 225 [2022-01-10 21:50:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:22,331 INFO L470 AbstractCegarLoop]: Abstraction has 4928 states and 5995 transitions. [2022-01-10 21:50:22,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 21:50:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 5995 transitions. [2022-01-10 21:50:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-10 21:50:22,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:22,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:22,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 21:50:22,338 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:22,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash 409724204, now seen corresponding path program 1 times [2022-01-10 21:50:22,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:22,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142053634] [2022-01-10 21:50:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:22,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:22,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:22,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142053634] [2022-01-10 21:50:22,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142053634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:22,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:22,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:22,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645180485] [2022-01-10 21:50:22,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:22,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:22,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:22,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:22,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:22,626 INFO L87 Difference]: Start difference. First operand 4928 states and 5995 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 21:50:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:23,796 INFO L93 Difference]: Finished difference Result 13475 states and 16341 transitions. [2022-01-10 21:50:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:23,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 226 [2022-01-10 21:50:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:23,818 INFO L225 Difference]: With dead ends: 13475 [2022-01-10 21:50:23,819 INFO L226 Difference]: Without dead ends: 8201 [2022-01-10 21:50:23,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:23,828 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 199 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:23,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 88 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:50:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8201 states. [2022-01-10 21:50:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8201 to 8200. [2022-01-10 21:50:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8200 states, 8199 states have (on average 1.199048664471277) internal successors, (9831), 8199 states have internal predecessors, (9831), 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 21:50:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8200 states to 8200 states and 9831 transitions. [2022-01-10 21:50:23,938 INFO L78 Accepts]: Start accepts. Automaton has 8200 states and 9831 transitions. Word has length 226 [2022-01-10 21:50:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:23,938 INFO L470 AbstractCegarLoop]: Abstraction has 8200 states and 9831 transitions. [2022-01-10 21:50:23,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 21:50:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 8200 states and 9831 transitions. [2022-01-10 21:50:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-10 21:50:23,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:23,947 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:23,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 21:50:23,947 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash -806056445, now seen corresponding path program 1 times [2022-01-10 21:50:23,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:23,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614044318] [2022-01-10 21:50:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:23,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:24,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614044318] [2022-01-10 21:50:24,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614044318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:24,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:24,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:24,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914954853] [2022-01-10 21:50:24,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:24,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:24,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:24,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:24,060 INFO L87 Difference]: Start difference. First operand 8200 states and 9831 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 21:50:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:25,080 INFO L93 Difference]: Finished difference Result 28207 states and 33811 transitions. [2022-01-10 21:50:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:25,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 230 [2022-01-10 21:50:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:25,125 INFO L225 Difference]: With dead ends: 28207 [2022-01-10 21:50:25,125 INFO L226 Difference]: Without dead ends: 20009 [2022-01-10 21:50:25,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:25,137 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 489 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:25,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 306 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20009 states. [2022-01-10 21:50:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20009 to 19189. [2022-01-10 21:50:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19189 states, 19188 states have (on average 1.1907963310402334) internal successors, (22849), 19188 states have internal predecessors, (22849), 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 21:50:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19189 states to 19189 states and 22849 transitions. [2022-01-10 21:50:25,390 INFO L78 Accepts]: Start accepts. Automaton has 19189 states and 22849 transitions. Word has length 230 [2022-01-10 21:50:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:25,392 INFO L470 AbstractCegarLoop]: Abstraction has 19189 states and 22849 transitions. [2022-01-10 21:50:25,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 21:50:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 19189 states and 22849 transitions. [2022-01-10 21:50:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-10 21:50:25,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:25,409 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:25,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 21:50:25,409 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1632982420, now seen corresponding path program 1 times [2022-01-10 21:50:25,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:25,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748260226] [2022-01-10 21:50:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:25,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:25,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:25,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748260226] [2022-01-10 21:50:25,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748260226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:25,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:25,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:25,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547252368] [2022-01-10 21:50:25,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:25,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:25,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:25,593 INFO L87 Difference]: Start difference. First operand 19189 states and 22849 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 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 21:50:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:26,731 INFO L93 Difference]: Finished difference Result 59590 states and 71096 transitions. [2022-01-10 21:50:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 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 233 [2022-01-10 21:50:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:26,796 INFO L225 Difference]: With dead ends: 59590 [2022-01-10 21:50:26,797 INFO L226 Difference]: Without dead ends: 40403 [2022-01-10 21:50:26,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:26,821 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 504 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:26,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 437 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40403 states. [2022-01-10 21:50:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40403 to 40387. [2022-01-10 21:50:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40387 states, 40386 states have (on average 1.1883078294458476) internal successors, (47991), 40386 states have internal predecessors, (47991), 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 21:50:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40387 states to 40387 states and 47991 transitions. [2022-01-10 21:50:27,375 INFO L78 Accepts]: Start accepts. Automaton has 40387 states and 47991 transitions. Word has length 233 [2022-01-10 21:50:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:27,375 INFO L470 AbstractCegarLoop]: Abstraction has 40387 states and 47991 transitions. [2022-01-10 21:50:27,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 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 21:50:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 40387 states and 47991 transitions. [2022-01-10 21:50:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-10 21:50:27,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:27,388 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:27,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 21:50:27,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:27,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1225690116, now seen corresponding path program 1 times [2022-01-10 21:50:27,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:27,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896697806] [2022-01-10 21:50:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:27,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:27,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:27,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896697806] [2022-01-10 21:50:27,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896697806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:27,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:27,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:27,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464259546] [2022-01-10 21:50:27,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:27,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:27,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:27,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:27,714 INFO L87 Difference]: Start difference. First operand 40387 states and 47991 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 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 21:50:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:28,766 INFO L93 Difference]: Finished difference Result 98120 states and 116481 transitions. [2022-01-10 21:50:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 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) Word has length 246 [2022-01-10 21:50:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:28,860 INFO L225 Difference]: With dead ends: 98120 [2022-01-10 21:50:28,860 INFO L226 Difference]: Without dead ends: 57735 [2022-01-10 21:50:28,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:50:28,880 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 203 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:28,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 88 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57735 states. [2022-01-10 21:50:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57735 to 56921. [2022-01-10 21:50:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56921 states, 56920 states have (on average 1.1756676036542515) internal successors, (66919), 56920 states have internal predecessors, (66919), 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 21:50:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56921 states to 56921 states and 66919 transitions. [2022-01-10 21:50:29,685 INFO L78 Accepts]: Start accepts. Automaton has 56921 states and 66919 transitions. Word has length 246 [2022-01-10 21:50:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:29,685 INFO L470 AbstractCegarLoop]: Abstraction has 56921 states and 66919 transitions. [2022-01-10 21:50:29,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 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 21:50:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 56921 states and 66919 transitions. [2022-01-10 21:50:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-10 21:50:29,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:29,712 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:29,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 21:50:29,713 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:29,713 INFO L85 PathProgramCache]: Analyzing trace with hash -326671344, now seen corresponding path program 1 times [2022-01-10 21:50:29,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:29,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381451462] [2022-01-10 21:50:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:29,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:29,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:29,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381451462] [2022-01-10 21:50:29,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381451462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:29,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:29,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:29,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322017261] [2022-01-10 21:50:29,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:29,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:29,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:29,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:29,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:29,985 INFO L87 Difference]: Start difference. First operand 56921 states and 66919 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 2 states have internal predecessors, (258), 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 21:50:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:31,239 INFO L93 Difference]: Finished difference Result 152763 states and 179137 transitions. [2022-01-10 21:50:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:31,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 2 states have internal predecessors, (258), 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 258 [2022-01-10 21:50:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:31,355 INFO L225 Difference]: With dead ends: 152763 [2022-01-10 21:50:31,355 INFO L226 Difference]: Without dead ends: 95844 [2022-01-10 21:50:31,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:31,386 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 163 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:31,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 98 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95844 states. [2022-01-10 21:50:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95844 to 94205. [2022-01-10 21:50:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94205 states, 94204 states have (on average 1.1483270349454375) internal successors, (108177), 94204 states have internal predecessors, (108177), 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 21:50:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94205 states to 94205 states and 108177 transitions. [2022-01-10 21:50:32,780 INFO L78 Accepts]: Start accepts. Automaton has 94205 states and 108177 transitions. Word has length 258 [2022-01-10 21:50:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:32,781 INFO L470 AbstractCegarLoop]: Abstraction has 94205 states and 108177 transitions. [2022-01-10 21:50:32,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 2 states have internal predecessors, (258), 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 21:50:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 94205 states and 108177 transitions. [2022-01-10 21:50:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-10 21:50:32,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:32,817 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:32,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 21:50:32,818 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:32,818 INFO L85 PathProgramCache]: Analyzing trace with hash -236625970, now seen corresponding path program 1 times [2022-01-10 21:50:32,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:32,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783657879] [2022-01-10 21:50:32,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:32,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 21:50:33,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783657879] [2022-01-10 21:50:33,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783657879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:33,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:33,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:33,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415784286] [2022-01-10 21:50:33,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:33,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:33,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:33,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:33,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:33,005 INFO L87 Difference]: Start difference. First operand 94205 states and 108177 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:50:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:34,526 INFO L93 Difference]: Finished difference Result 209740 states and 239294 transitions. [2022-01-10 21:50:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:34,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2022-01-10 21:50:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:34,700 INFO L225 Difference]: With dead ends: 209740 [2022-01-10 21:50:34,701 INFO L226 Difference]: Without dead ends: 115537 [2022-01-10 21:50:34,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:34,749 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 619 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:34,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 118 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115537 states. [2022-01-10 21:50:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115537 to 106994. [2022-01-10 21:50:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106994 states, 106993 states have (on average 1.1359341265316423) internal successors, (121537), 106993 states have internal predecessors, (121537), 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 21:50:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106994 states to 106994 states and 121537 transitions. [2022-01-10 21:50:36,245 INFO L78 Accepts]: Start accepts. Automaton has 106994 states and 121537 transitions. Word has length 263 [2022-01-10 21:50:36,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:36,245 INFO L470 AbstractCegarLoop]: Abstraction has 106994 states and 121537 transitions. [2022-01-10 21:50:36,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:50:36,245 INFO L276 IsEmpty]: Start isEmpty. Operand 106994 states and 121537 transitions. [2022-01-10 21:50:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-10 21:50:36,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:36,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:36,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 21:50:36,278 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:36,278 INFO L85 PathProgramCache]: Analyzing trace with hash -749390728, now seen corresponding path program 1 times [2022-01-10 21:50:36,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:36,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46506694] [2022-01-10 21:50:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:36,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:36,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:36,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46506694] [2022-01-10 21:50:36,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46506694] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:50:36,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430782613] [2022-01-10 21:50:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:36,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:50:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:50:36,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:50:36,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 21:50:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 7486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 21:50:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:50:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-10 21:50:37,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:50:37,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430782613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:37,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:50:37,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-10 21:50:37,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306640451] [2022-01-10 21:50:37,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:37,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:37,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:50:37,750 INFO L87 Difference]: Start difference. First operand 106994 states and 121537 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 21:50:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:39,085 INFO L93 Difference]: Finished difference Result 254400 states and 286268 transitions. [2022-01-10 21:50:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:39,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 265 [2022-01-10 21:50:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:39,306 INFO L225 Difference]: With dead ends: 254400 [2022-01-10 21:50:39,307 INFO L226 Difference]: Without dead ends: 147408 [2022-01-10 21:50:39,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:50:39,371 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 70 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:39,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 55 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 21:50:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147408 states. [2022-01-10 21:50:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147408 to 147391. [2022-01-10 21:50:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147391 states, 147390 states have (on average 1.1157201981138476) internal successors, (164446), 147390 states have internal predecessors, (164446), 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 21:50:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147391 states to 147391 states and 164446 transitions. [2022-01-10 21:50:41,722 INFO L78 Accepts]: Start accepts. Automaton has 147391 states and 164446 transitions. Word has length 265 [2022-01-10 21:50:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:41,722 INFO L470 AbstractCegarLoop]: Abstraction has 147391 states and 164446 transitions. [2022-01-10 21:50:41,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 21:50:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 147391 states and 164446 transitions. [2022-01-10 21:50:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-10 21:50:41,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:41,792 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:41,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 21:50:42,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-10 21:50:42,008 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1091697373, now seen corresponding path program 1 times [2022-01-10 21:50:42,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:42,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028842804] [2022-01-10 21:50:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:42,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 21:50:42,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:42,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028842804] [2022-01-10 21:50:42,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028842804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:42,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:42,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:42,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267204183] [2022-01-10 21:50:42,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:42,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:42,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:42,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:42,140 INFO L87 Difference]: Start difference. First operand 147391 states and 164446 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 21:50:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:44,652 INFO L93 Difference]: Finished difference Result 425652 states and 475404 transitions. [2022-01-10 21:50:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:44,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 267 [2022-01-10 21:50:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:45,125 INFO L225 Difference]: With dead ends: 425652 [2022-01-10 21:50:45,125 INFO L226 Difference]: Without dead ends: 278263 [2022-01-10 21:50:45,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:45,199 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 697 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:45,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 329 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:50:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278263 states. [2022-01-10 21:50:48,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278263 to 233148. [2022-01-10 21:50:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233148 states, 233147 states have (on average 1.11497038349196) internal successors, (259952), 233147 states have internal predecessors, (259952), 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 21:50:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233148 states to 233148 states and 259952 transitions. [2022-01-10 21:50:48,776 INFO L78 Accepts]: Start accepts. Automaton has 233148 states and 259952 transitions. Word has length 267 [2022-01-10 21:50:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:48,776 INFO L470 AbstractCegarLoop]: Abstraction has 233148 states and 259952 transitions. [2022-01-10 21:50:48,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 21:50:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 233148 states and 259952 transitions. [2022-01-10 21:50:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-10 21:50:49,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:49,110 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:49,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 21:50:49,110 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1866835607, now seen corresponding path program 1 times [2022-01-10 21:50:49,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:49,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494539664] [2022-01-10 21:50:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:49,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 21:50:49,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:49,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494539664] [2022-01-10 21:50:49,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494539664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:49,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:49,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:49,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069854395] [2022-01-10 21:50:49,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:49,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:49,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:49,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:49,275 INFO L87 Difference]: Start difference. First operand 233148 states and 259952 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 21:50:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:52,053 INFO L93 Difference]: Finished difference Result 572219 states and 639301 transitions. [2022-01-10 21:50:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:52,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 305 [2022-01-10 21:50:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:52,608 INFO L225 Difference]: With dead ends: 572219 [2022-01-10 21:50:52,609 INFO L226 Difference]: Without dead ends: 339073 [2022-01-10 21:50:52,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:50:52,689 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 155 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:52,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 101 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339073 states. [2022-01-10 21:50:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339073 to 338911. [2022-01-10 21:50:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338911 states, 338910 states have (on average 1.1143784485556638) internal successors, (377674), 338910 states have internal predecessors, (377674), 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 21:50:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338911 states to 338911 states and 377674 transitions. [2022-01-10 21:50:57,570 INFO L78 Accepts]: Start accepts. Automaton has 338911 states and 377674 transitions. Word has length 305 [2022-01-10 21:50:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:57,570 INFO L470 AbstractCegarLoop]: Abstraction has 338911 states and 377674 transitions. [2022-01-10 21:50:57,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 21:50:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 338911 states and 377674 transitions. [2022-01-10 21:50:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-10 21:50:57,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:57,642 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:57,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 21:50:57,642 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1768882505, now seen corresponding path program 1 times [2022-01-10 21:50:57,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:57,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646536042] [2022-01-10 21:50:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:57,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:58,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:58,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646536042] [2022-01-10 21:50:58,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646536042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:58,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:58,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:58,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050416923] [2022-01-10 21:50:58,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:58,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:58,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:58,097 INFO L87 Difference]: Start difference. First operand 338911 states and 377674 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 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 21:51:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:01,875 INFO L93 Difference]: Finished difference Result 796593 states and 885129 transitions. [2022-01-10 21:51:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:01,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 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 310 [2022-01-10 21:51:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:03,288 INFO L225 Difference]: With dead ends: 796593 [2022-01-10 21:51:03,289 INFO L226 Difference]: Without dead ends: 457684 [2022-01-10 21:51:03,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:51:03,637 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:03,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 80 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:51:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457684 states.