/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_LAZY.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 16:01:44,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 16:01:44,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 16:01:44,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 16:01:44,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 16:01:44,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 16:01:44,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 16:01:44,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 16:01:44,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 16:01:44,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 16:01:44,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 16:01:44,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 16:01:44,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 16:01:44,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 16:01:44,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 16:01:44,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 16:01:44,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 16:01:44,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 16:01:44,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 16:01:44,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 16:01:44,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 16:01:44,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 16:01:44,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 16:01:44,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 16:01:44,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 16:01:44,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 16:01:44,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 16:01:44,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 16:01:44,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 16:01:44,938 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 16:01:44,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 16:01:44,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 16:01:44,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 16:01:44,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 16:01:44,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 16:01:44,940 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 16:01:44,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 16:01:44,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 16:01:44,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 16:01:44,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 16:01:44,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 16:01:44,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 16:01:44,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 16:01:44,942 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 16:01:44,942 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 16:01:44,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 16:01:44,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 16:01:44,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 16:01:44,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 16:01:44,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 16:01:44,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 16:01:44,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 16:01:44,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 16:01:44,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 16:01:44,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 16:01:44,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 16:01:44,945 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 16:01:44,945 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 16:01:44,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 16:01:44,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 16:01:44,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 16:01:44,947 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 16:01:44,947 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 16:01:45,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 16:01:45,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 16:01:45,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 16:01:45,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 16:01:45,195 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 16:01:45,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label42.c [2022-01-10 16:01:45,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94db2c3c2/d843fff969be474f86dbf1df96de01e6/FLAG290090dff [2022-01-10 16:01:45,794 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 16:01:45,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label42.c [2022-01-10 16:01:45,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94db2c3c2/d843fff969be474f86dbf1df96de01e6/FLAG290090dff [2022-01-10 16:01:46,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94db2c3c2/d843fff969be474f86dbf1df96de01e6 [2022-01-10 16:01:46,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 16:01:46,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 16:01:46,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 16:01:46,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 16:01:46,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 16:01:46,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:01:46" (1/1) ... [2022-01-10 16:01:46,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24693507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:46, skipping insertion in model container [2022-01-10 16:01:46,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:01:46" (1/1) ... [2022-01-10 16:01:46,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 16:01:46,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 16:01:46,901 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_label42.c[60691,60704] [2022-01-10 16:01:46,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 16:01:46,959 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 16:01:47,178 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_label42.c[60691,60704] [2022-01-10 16:01:47,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 16:01:47,208 INFO L208 MainTranslator]: Completed translation [2022-01-10 16:01:47,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47 WrapperNode [2022-01-10 16:01:47,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 16:01:47,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 16:01:47,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 16:01:47,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 16:01:47,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,345 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 16:01:47,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 16:01:47,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 16:01:47,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 16:01:47,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 16:01:47,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 16:01:47,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 16:01:47,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 16:01:47,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 16:01:47,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (1/1) ... [2022-01-10 16:01:47,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 16:01:47,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:01:47,496 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 16:01:47,510 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 16:01:47,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 16:01:47,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 16:01:47,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 16:01:47,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 16:01:47,633 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 16:01:47,634 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 16:01:49,487 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 16:01:49,496 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 16:01:49,496 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 16:01:49,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:01:49 BoogieIcfgContainer [2022-01-10 16:01:49,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 16:01:49,499 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 16:01:49,499 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 16:01:49,500 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 16:01:49,503 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:01:49" (1/1) ... [2022-01-10 16:01:49,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 04:01:49 BasicIcfg [2022-01-10 16:01:49,915 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 16:01:49,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 16:01:49,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 16:01:49,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 16:01:49,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:01:46" (1/4) ... [2022-01-10 16:01:49,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc52561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:01:49, skipping insertion in model container [2022-01-10 16:01:49,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:01:47" (2/4) ... [2022-01-10 16:01:49,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc52561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:01:49, skipping insertion in model container [2022-01-10 16:01:49,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:01:49" (3/4) ... [2022-01-10 16:01:49,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc52561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 04:01:49, skipping insertion in model container [2022-01-10 16:01:49,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 04:01:49" (4/4) ... [2022-01-10 16:01:49,921 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label42.cTransformedIcfg [2022-01-10 16:01:49,926 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 16:01:49,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 16:01:49,978 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 16:01:49,987 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 16:01:49,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 16:01:50,010 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 16:01:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-10 16:01:50,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:01:50,036 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, 1] [2022-01-10 16:01:50,036 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:01:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:01:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1622509450, now seen corresponding path program 1 times [2022-01-10 16:01:50,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:01:50,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198887532] [2022-01-10 16:01:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:01:50,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:01:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:01:50,910 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 16:01:50,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:01:50,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198887532] [2022-01-10 16:01:50,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198887532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:01:50,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:01:50,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:01:50,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482272038] [2022-01-10 16:01:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:01:50,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:01:50,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:01:50,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:01:50,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:01:50,955 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 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 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 16:01:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:01:52,387 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2022-01-10 16:01:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:01:52,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 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 196 [2022-01-10 16:01:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:01:52,402 INFO L225 Difference]: With dead ends: 855 [2022-01-10 16:01:52,403 INFO L226 Difference]: Without dead ends: 460 [2022-01-10 16:01:52,406 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 16:01:52,409 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 100 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 16:01:52,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 16:01:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-01-10 16:01:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2022-01-10 16:01:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 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 16:01:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2022-01-10 16:01:52,475 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 196 [2022-01-10 16:01:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:01:52,476 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2022-01-10 16:01:52,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 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 16:01:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2022-01-10 16:01:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 16:01:52,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:01:52,484 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-01-10 16:01:52,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 16:01:52,485 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:01:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:01:52,486 INFO L85 PathProgramCache]: Analyzing trace with hash 204095136, now seen corresponding path program 1 times [2022-01-10 16:01:52,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:01:52,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048333057] [2022-01-10 16:01:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:01:52,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:01:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:01:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:01:52,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:01:52,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048333057] [2022-01-10 16:01:52,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048333057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:01:52,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:01:52,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:01:52,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791605487] [2022-01-10 16:01:52,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:01:52,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:01:52,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:01:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:01:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:01:52,663 INFO L87 Difference]: Start difference. First operand 459 states and 710 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 16:01:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:01:53,098 INFO L93 Difference]: Finished difference Result 1356 states and 2104 transitions. [2022-01-10 16:01:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:01:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 201 [2022-01-10 16:01:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:01:53,103 INFO L225 Difference]: With dead ends: 1356 [2022-01-10 16:01:53,104 INFO L226 Difference]: Without dead ends: 899 [2022-01-10 16:01:53,105 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 16:01:53,106 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 16:01:53,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 16:01:53,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-01-10 16:01:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2022-01-10 16:01:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 1.5491071428571428) internal successors, (1388), 896 states have internal predecessors, (1388), 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 16:01:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1388 transitions. [2022-01-10 16:01:53,150 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1388 transitions. Word has length 201 [2022-01-10 16:01:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:01:53,151 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1388 transitions. [2022-01-10 16:01:53,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 16:01:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1388 transitions. [2022-01-10 16:01:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-10 16:01:53,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:01:53,158 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, 1] [2022-01-10 16:01:53,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 16:01:53,161 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:01:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:01:53,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1594217126, now seen corresponding path program 1 times [2022-01-10 16:01:53,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:01:53,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489213467] [2022-01-10 16:01:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:01:53,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:01:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:01:53,369 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 16:01:53,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:01:53,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489213467] [2022-01-10 16:01:53,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489213467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:01:53,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:01:53,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:01:53,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464907794] [2022-01-10 16:01:53,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:01:53,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:01:53,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:01:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:01:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:01:53,373 INFO L87 Difference]: Start difference. First operand 897 states and 1388 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 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 16:01:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:01:54,490 INFO L93 Difference]: Finished difference Result 2647 states and 4116 transitions. [2022-01-10 16:01:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:01:54,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 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 204 [2022-01-10 16:01:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:01:54,502 INFO L225 Difference]: With dead ends: 2647 [2022-01-10 16:01:54,503 INFO L226 Difference]: Without dead ends: 1752 [2022-01-10 16:01:54,504 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 16:01:54,506 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 16:01:54,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 96 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 16:01:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-01-10 16:01:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1721. [2022-01-10 16:01:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 1.5151162790697674) internal successors, (2606), 1720 states have internal predecessors, (2606), 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 16:01:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2606 transitions. [2022-01-10 16:01:54,542 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2606 transitions. Word has length 204 [2022-01-10 16:01:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:01:54,542 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 2606 transitions. [2022-01-10 16:01:54,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 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 16:01:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2606 transitions. [2022-01-10 16:01:54,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-10 16:01:54,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:01:54,547 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:01:54,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 16:01:54,547 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:01:54,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:01:54,548 INFO L85 PathProgramCache]: Analyzing trace with hash 793758910, now seen corresponding path program 1 times [2022-01-10 16:01:54,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:01:54,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85905459] [2022-01-10 16:01:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:01:54,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:01:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:01:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 16:01:54,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:01:54,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85905459] [2022-01-10 16:01:54,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85905459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:01:54,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:01:54,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:01:54,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889559965] [2022-01-10 16:01:54,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:01:54,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:01:54,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:01:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:01:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:01:54,669 INFO L87 Difference]: Start difference. First operand 1721 states and 2606 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 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 16:01:55,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:01:55,239 INFO L93 Difference]: Finished difference Result 3393 states and 5147 transitions. [2022-01-10 16:01:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:01:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 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 214 [2022-01-10 16:01:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:01:55,246 INFO L225 Difference]: With dead ends: 3393 [2022-01-10 16:01:55,246 INFO L226 Difference]: Without dead ends: 1674 [2022-01-10 16:01:55,248 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 16:01:55,249 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 16:01:55,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 16:01:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-01-10 16:01:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1674. [2022-01-10 16:01:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.474596533173939) internal successors, (2467), 1673 states have internal predecessors, (2467), 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 16:01:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2467 transitions. [2022-01-10 16:01:55,287 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2467 transitions. Word has length 214 [2022-01-10 16:01:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:01:55,287 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 2467 transitions. [2022-01-10 16:01:55,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 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 16:01:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2467 transitions. [2022-01-10 16:01:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-10 16:01:55,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:01:55,291 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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 16:01:55,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 16:01:55,291 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:01:55,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:01:55,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1238867474, now seen corresponding path program 1 times [2022-01-10 16:01:55,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:01:55,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452685948] [2022-01-10 16:01:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:01:55,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:01:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:01:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 16:01:55,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:01:55,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452685948] [2022-01-10 16:01:55,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452685948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:01:55,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:01:55,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:01:55,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136335471] [2022-01-10 16:01:55,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:01:55,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:01:55,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:01:55,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:01:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:01:55,423 INFO L87 Difference]: Start difference. First operand 1674 states and 2467 transitions. Second operand has 3 states, 3 states have (on average 71.0) 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 16:01:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:01:56,437 INFO L93 Difference]: Finished difference Result 3341 states and 4924 transitions. [2022-01-10 16:01:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:01:56,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) 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 218 [2022-01-10 16:01:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:01:56,444 INFO L225 Difference]: With dead ends: 3341 [2022-01-10 16:01:56,444 INFO L226 Difference]: Without dead ends: 1669 [2022-01-10 16:01:56,446 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 16:01:56,447 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 253 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 16:01:56,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 344 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 16:01:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2022-01-10 16:01:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1667. [2022-01-10 16:01:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 1.3457382953181272) internal successors, (2242), 1666 states have internal predecessors, (2242), 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 16:01:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2242 transitions. [2022-01-10 16:01:56,517 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2242 transitions. Word has length 218 [2022-01-10 16:01:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:01:56,517 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2242 transitions. [2022-01-10 16:01:56,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) 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 16:01:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2242 transitions. [2022-01-10 16:01:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-10 16:01:56,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:01:56,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2022-01-10 16:01:56,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 16:01:56,522 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:01:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:01:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash 529727744, now seen corresponding path program 1 times [2022-01-10 16:01:56,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:01:56,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041107048] [2022-01-10 16:01:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:01:56,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:01:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:01:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 16:01:56,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:01:56,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041107048] [2022-01-10 16:01:56,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041107048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:01:56,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:01:56,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:01:56,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183158627] [2022-01-10 16:01:56,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:01:56,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:01:56,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:01:56,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:01:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:01:56,694 INFO L87 Difference]: Start difference. First operand 1667 states and 2242 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 16:01:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:01:57,746 INFO L93 Difference]: Finished difference Result 4960 states and 6676 transitions. [2022-01-10 16:01:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:01:57,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 234 [2022-01-10 16:01:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:01:57,763 INFO L225 Difference]: With dead ends: 4960 [2022-01-10 16:01:57,763 INFO L226 Difference]: Without dead ends: 3295 [2022-01-10 16:01:57,767 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 16:01:57,770 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 194 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 16:01:57,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 379 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 16:01:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2022-01-10 16:01:57,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 3291. [2022-01-10 16:01:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3290 states have (on average 1.2231003039513677) internal successors, (4024), 3290 states have internal predecessors, (4024), 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 16:01:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 4024 transitions. [2022-01-10 16:01:57,856 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 4024 transitions. Word has length 234 [2022-01-10 16:01:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:01:57,857 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 4024 transitions. [2022-01-10 16:01:57,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 16:01:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 4024 transitions. [2022-01-10 16:01:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-10 16:01:57,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:01:57,864 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:01:57,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 16:01:57,865 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:01:57,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:01:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1487255956, now seen corresponding path program 1 times [2022-01-10 16:01:57,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:01:57,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944648671] [2022-01-10 16:01:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:01:57,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:01:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:01:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 16:01:58,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:01:58,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944648671] [2022-01-10 16:01:58,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944648671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:01:58,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:01:58,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:01:58,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258424860] [2022-01-10 16:01:58,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:01:58,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:01:58,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:01:58,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:01:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:01:58,050 INFO L87 Difference]: Start difference. First operand 3291 states and 4024 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 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 16:01:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:01:59,032 INFO L93 Difference]: Finished difference Result 8208 states and 10240 transitions. [2022-01-10 16:01:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:01:59,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 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 234 [2022-01-10 16:01:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:01:59,050 INFO L225 Difference]: With dead ends: 8208 [2022-01-10 16:01:59,050 INFO L226 Difference]: Without dead ends: 4919 [2022-01-10 16:01:59,056 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 16:01:59,056 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 209 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:01:59,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 135 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:01:59,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4919 states. [2022-01-10 16:01:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4919 to 4915. [2022-01-10 16:01:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 1.1921041921041922) internal successors, (5858), 4914 states have internal predecessors, (5858), 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 16:01:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 5858 transitions. [2022-01-10 16:01:59,150 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 5858 transitions. Word has length 234 [2022-01-10 16:01:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:01:59,151 INFO L470 AbstractCegarLoop]: Abstraction has 4915 states and 5858 transitions. [2022-01-10 16:01:59,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 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 16:01:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 5858 transitions. [2022-01-10 16:01:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-10 16:01:59,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:01:59,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:01:59,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 16:01:59,157 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:01:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:01:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1302789401, now seen corresponding path program 1 times [2022-01-10 16:01:59,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:01:59,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77043928] [2022-01-10 16:01:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:01:59,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:01:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:01:59,309 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 16:01:59,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:01:59,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77043928] [2022-01-10 16:01:59,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77043928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:01:59,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:01:59,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:01:59,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806714545] [2022-01-10 16:01:59,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:01:59,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:01:59,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:01:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:01:59,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:01:59,311 INFO L87 Difference]: Start difference. First operand 4915 states and 5858 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 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 16:02:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:00,277 INFO L93 Difference]: Finished difference Result 12281 states and 14603 transitions. [2022-01-10 16:02:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:00,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 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 237 [2022-01-10 16:02:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:00,301 INFO L225 Difference]: With dead ends: 12281 [2022-01-10 16:02:00,301 INFO L226 Difference]: Without dead ends: 7368 [2022-01-10 16:02:00,308 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 16:02:00,309 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 196 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:00,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 69 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:02:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7368 states. [2022-01-10 16:02:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7368 to 7366. [2022-01-10 16:02:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7366 states, 7365 states have (on average 1.1773251866938221) internal successors, (8671), 7365 states have internal predecessors, (8671), 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 16:02:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7366 states to 7366 states and 8671 transitions. [2022-01-10 16:02:00,433 INFO L78 Accepts]: Start accepts. Automaton has 7366 states and 8671 transitions. Word has length 237 [2022-01-10 16:02:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:00,433 INFO L470 AbstractCegarLoop]: Abstraction has 7366 states and 8671 transitions. [2022-01-10 16:02:00,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 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 16:02:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7366 states and 8671 transitions. [2022-01-10 16:02:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-10 16:02:00,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:00,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:00,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 16:02:00,443 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1638054833, now seen corresponding path program 1 times [2022-01-10 16:02:00,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:00,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668385527] [2022-01-10 16:02:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:00,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:02:00,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:00,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668385527] [2022-01-10 16:02:00,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668385527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:02:00,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807493075] [2022-01-10 16:02:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:00,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:02:00,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:02:00,628 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 16:02:00,632 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 16:02:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:01,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 6831 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 16:02:01,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:02:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 16:02:01,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:02:01,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807493075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:01,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:02:01,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:02:01,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483142121] [2022-01-10 16:02:01,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:01,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:02:01,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:01,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:02:01,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:02:01,911 INFO L87 Difference]: Start difference. First operand 7366 states and 8671 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 16:02:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:02,871 INFO L93 Difference]: Finished difference Result 21230 states and 24975 transitions. [2022-01-10 16:02:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 244 [2022-01-10 16:02:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:02,917 INFO L225 Difference]: With dead ends: 21230 [2022-01-10 16:02:02,917 INFO L226 Difference]: Without dead ends: 13866 [2022-01-10 16:02:02,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 243 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 16:02:02,931 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 55 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:02,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 319 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:02:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13866 states. [2022-01-10 16:02:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13866 to 13862. [2022-01-10 16:02:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13862 states, 13861 states have (on average 1.146959093860472) internal successors, (15898), 13861 states have internal predecessors, (15898), 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 16:02:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13862 states to 13862 states and 15898 transitions. [2022-01-10 16:02:03,237 INFO L78 Accepts]: Start accepts. Automaton has 13862 states and 15898 transitions. Word has length 244 [2022-01-10 16:02:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:03,238 INFO L470 AbstractCegarLoop]: Abstraction has 13862 states and 15898 transitions. [2022-01-10 16:02:03,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 16:02:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 13862 states and 15898 transitions. [2022-01-10 16:02:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-10 16:02:03,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:03,260 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:03,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 16:02:03,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:02:03,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash -946683220, now seen corresponding path program 1 times [2022-01-10 16:02:03,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:03,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796668078] [2022-01-10 16:02:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:03,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 16:02:03,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:03,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796668078] [2022-01-10 16:02:03,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796668078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:03,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:02:03,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:02:03,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425285565] [2022-01-10 16:02:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:03,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:02:03,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:02:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:02:03,716 INFO L87 Difference]: Start difference. First operand 13862 states and 15898 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 2 states have internal predecessors, (272), 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 16:02:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:04,784 INFO L93 Difference]: Finished difference Result 37691 states and 43213 transitions. [2022-01-10 16:02:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:04,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 2 states have internal predecessors, (272), 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 326 [2022-01-10 16:02:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:04,829 INFO L225 Difference]: With dead ends: 37691 [2022-01-10 16:02:04,829 INFO L226 Difference]: Without dead ends: 23831 [2022-01-10 16:02:04,849 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 16:02:04,849 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:04,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 183 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:02:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23831 states. [2022-01-10 16:02:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23831 to 17520. [2022-01-10 16:02:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17520 states, 17519 states have (on average 1.1616530623894057) internal successors, (20351), 17519 states have internal predecessors, (20351), 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 16:02:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17520 states to 17520 states and 20351 transitions. [2022-01-10 16:02:05,139 INFO L78 Accepts]: Start accepts. Automaton has 17520 states and 20351 transitions. Word has length 326 [2022-01-10 16:02:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:05,140 INFO L470 AbstractCegarLoop]: Abstraction has 17520 states and 20351 transitions. [2022-01-10 16:02:05,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 2 states have internal predecessors, (272), 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 16:02:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 17520 states and 20351 transitions. [2022-01-10 16:02:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-10 16:02:05,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:05,163 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:05,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 16:02:05,164 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:05,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash 474012370, now seen corresponding path program 1 times [2022-01-10 16:02:05,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:05,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278274804] [2022-01-10 16:02:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:05,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 138 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 16:02:05,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278274804] [2022-01-10 16:02:05,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278274804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:02:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643924646] [2022-01-10 16:02:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:05,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:02:05,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:02:05,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 16:02:05,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 16:02:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:06,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 9440 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 16:02:06,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:02:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-01-10 16:02:07,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:02:07,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643924646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:07,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:02:07,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:02:07,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685613178] [2022-01-10 16:02:07,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:07,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:02:07,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:07,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:02:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:02:07,082 INFO L87 Difference]: Start difference. First operand 17520 states and 20351 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 16:02:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:07,991 INFO L93 Difference]: Finished difference Result 35042 states and 40706 transitions. [2022-01-10 16:02:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 331 [2022-01-10 16:02:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:08,020 INFO L225 Difference]: With dead ends: 35042 [2022-01-10 16:02:08,020 INFO L226 Difference]: Without dead ends: 17524 [2022-01-10 16:02:08,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 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 16:02:08,038 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 67 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:08,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 16:02:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17524 states. [2022-01-10 16:02:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17524 to 16911. [2022-01-10 16:02:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16911 states, 16910 states have (on average 1.148669426374926) internal successors, (19424), 16910 states have internal predecessors, (19424), 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 16:02:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16911 states to 16911 states and 19424 transitions. [2022-01-10 16:02:08,270 INFO L78 Accepts]: Start accepts. Automaton has 16911 states and 19424 transitions. Word has length 331 [2022-01-10 16:02:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:08,271 INFO L470 AbstractCegarLoop]: Abstraction has 16911 states and 19424 transitions. [2022-01-10 16:02:08,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 16:02:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 16911 states and 19424 transitions. [2022-01-10 16:02:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-10 16:02:08,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:08,298 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 16:02:08,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 16:02:08,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 16:02:08,513 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash 356864273, now seen corresponding path program 1 times [2022-01-10 16:02:08,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781358416] [2022-01-10 16:02:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:08,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 16:02:08,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:08,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781358416] [2022-01-10 16:02:08,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781358416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:08,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:02:08,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:02:08,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979667075] [2022-01-10 16:02:08,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:08,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:02:08,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:02:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:02:08,915 INFO L87 Difference]: Start difference. First operand 16911 states and 19424 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 16:02:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:09,932 INFO L93 Difference]: Finished difference Result 40127 states and 45982 transitions. [2022-01-10 16:02:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:09,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 347 [2022-01-10 16:02:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:09,984 INFO L225 Difference]: With dead ends: 40127 [2022-01-10 16:02:09,985 INFO L226 Difference]: Without dead ends: 23218 [2022-01-10 16:02:10,003 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 16:02:10,003 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 87 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:10,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 332 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:02:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23218 states. [2022-01-10 16:02:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23218 to 22798. [2022-01-10 16:02:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22798 states, 22797 states have (on average 1.1326490327674694) internal successors, (25821), 22797 states have internal predecessors, (25821), 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 16:02:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22798 states to 22798 states and 25821 transitions. [2022-01-10 16:02:10,324 INFO L78 Accepts]: Start accepts. Automaton has 22798 states and 25821 transitions. Word has length 347 [2022-01-10 16:02:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:10,324 INFO L470 AbstractCegarLoop]: Abstraction has 22798 states and 25821 transitions. [2022-01-10 16:02:10,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 16:02:10,325 INFO L276 IsEmpty]: Start isEmpty. Operand 22798 states and 25821 transitions. [2022-01-10 16:02:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-10 16:02:10,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:10,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 16:02:10,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 16:02:10,353 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash -376865133, now seen corresponding path program 1 times [2022-01-10 16:02:10,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:10,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119351007] [2022-01-10 16:02:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:10,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:02:10,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:10,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119351007] [2022-01-10 16:02:10,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119351007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:10,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:02:10,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:02:10,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510483222] [2022-01-10 16:02:10,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:10,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 16:02:10,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 16:02:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 16:02:10,773 INFO L87 Difference]: Start difference. First operand 22798 states and 25821 transitions. Second operand has 4 states, 4 states have (on average 90.75) internal successors, (363), 3 states have internal predecessors, (363), 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 16:02:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:12,303 INFO L93 Difference]: Finished difference Result 46220 states and 52379 transitions. [2022-01-10 16:02:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 16:02:12,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.75) internal successors, (363), 3 states have internal predecessors, (363), 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 363 [2022-01-10 16:02:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:12,339 INFO L225 Difference]: With dead ends: 46220 [2022-01-10 16:02:12,339 INFO L226 Difference]: Without dead ends: 23424 [2022-01-10 16:02:12,357 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 16:02:12,358 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 277 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:12,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 96 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 16:02:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23424 states. [2022-01-10 16:02:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23424 to 22595. [2022-01-10 16:02:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22595 states, 22594 states have (on average 1.1331326900947154) internal successors, (25602), 22594 states have internal predecessors, (25602), 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 16:02:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22595 states to 22595 states and 25602 transitions. [2022-01-10 16:02:12,774 INFO L78 Accepts]: Start accepts. Automaton has 22595 states and 25602 transitions. Word has length 363 [2022-01-10 16:02:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:12,774 INFO L470 AbstractCegarLoop]: Abstraction has 22595 states and 25602 transitions. [2022-01-10 16:02:12,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.75) internal successors, (363), 3 states have internal predecessors, (363), 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 16:02:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 22595 states and 25602 transitions. [2022-01-10 16:02:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-01-10 16:02:12,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:12,796 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 16:02:12,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 16:02:12,796 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:12,797 INFO L85 PathProgramCache]: Analyzing trace with hash 53642027, now seen corresponding path program 1 times [2022-01-10 16:02:12,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:12,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598807374] [2022-01-10 16:02:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:12,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-01-10 16:02:13,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:13,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598807374] [2022-01-10 16:02:13,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598807374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:13,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:02:13,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:02:13,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517317657] [2022-01-10 16:02:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:13,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 16:02:13,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 16:02:13,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 16:02:13,013 INFO L87 Difference]: Start difference. First operand 22595 states and 25602 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 16:02:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:14,562 INFO L93 Difference]: Finished difference Result 66160 states and 75089 transitions. [2022-01-10 16:02:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 16:02:14,563 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 370 [2022-01-10 16:02:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:14,622 INFO L225 Difference]: With dead ends: 66160 [2022-01-10 16:02:14,622 INFO L226 Difference]: Without dead ends: 43567 [2022-01-10 16:02:14,647 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 16:02:14,647 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 526 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:14,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 474 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 16:02:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43567 states. [2022-01-10 16:02:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43567 to 43552. [2022-01-10 16:02:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43552 states, 43551 states have (on average 1.1321898463869946) internal successors, (49308), 43551 states have internal predecessors, (49308), 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 16:02:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43552 states to 43552 states and 49308 transitions. [2022-01-10 16:02:15,348 INFO L78 Accepts]: Start accepts. Automaton has 43552 states and 49308 transitions. Word has length 370 [2022-01-10 16:02:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:15,348 INFO L470 AbstractCegarLoop]: Abstraction has 43552 states and 49308 transitions. [2022-01-10 16:02:15,348 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 16:02:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 43552 states and 49308 transitions. [2022-01-10 16:02:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-01-10 16:02:15,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:15,367 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 16:02:15,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 16:02:15,367 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:15,368 INFO L85 PathProgramCache]: Analyzing trace with hash 812311040, now seen corresponding path program 1 times [2022-01-10 16:02:15,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:15,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585471315] [2022-01-10 16:02:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:15,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-01-10 16:02:15,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:15,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585471315] [2022-01-10 16:02:15,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585471315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:02:15,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084665666] [2022-01-10 16:02:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:15,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:02:15,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:02:15,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 16:02:15,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 16:02:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:16,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 10960 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 16:02:16,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:02:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 16:02:17,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:02:17,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084665666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:17,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:02:17,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:02:17,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109057998] [2022-01-10 16:02:17,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:17,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:02:17,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:17,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:02:17,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:02:17,448 INFO L87 Difference]: Start difference. First operand 43552 states and 49308 transitions. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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 16:02:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:18,479 INFO L93 Difference]: Finished difference Result 87920 states and 99452 transitions. [2022-01-10 16:02:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:18,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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 380 [2022-01-10 16:02:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:18,587 INFO L225 Difference]: With dead ends: 87920 [2022-01-10 16:02:18,587 INFO L226 Difference]: Without dead ends: 44370 [2022-01-10 16:02:18,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 379 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 16:02:18,637 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 135 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:18,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 42 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 16:02:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44370 states. [2022-01-10 16:02:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44370 to 43552. [2022-01-10 16:02:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43552 states, 43551 states have (on average 1.1313402677320843) internal successors, (49271), 43551 states have internal predecessors, (49271), 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 16:02:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43552 states to 43552 states and 49271 transitions. [2022-01-10 16:02:19,394 INFO L78 Accepts]: Start accepts. Automaton has 43552 states and 49271 transitions. Word has length 380 [2022-01-10 16:02:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:19,394 INFO L470 AbstractCegarLoop]: Abstraction has 43552 states and 49271 transitions. [2022-01-10 16:02:19,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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 16:02:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 43552 states and 49271 transitions. [2022-01-10 16:02:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-10 16:02:19,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:19,421 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 16:02:19,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 16:02:19,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:02:19,648 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1994481771, now seen corresponding path program 1 times [2022-01-10 16:02:19,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:19,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490518038] [2022-01-10 16:02:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:19,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-01-10 16:02:20,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:20,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490518038] [2022-01-10 16:02:20,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490518038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:20,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:02:20,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:02:20,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076236933] [2022-01-10 16:02:20,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:20,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:02:20,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:02:20,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:02:20,033 INFO L87 Difference]: Start difference. First operand 43552 states and 49271 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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 16:02:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:20,780 INFO L93 Difference]: Finished difference Result 127349 states and 144154 transitions. [2022-01-10 16:02:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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 427 [2022-01-10 16:02:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:20,902 INFO L225 Difference]: With dead ends: 127349 [2022-01-10 16:02:20,902 INFO L226 Difference]: Without dead ends: 83799 [2022-01-10 16:02:20,940 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 16:02:20,941 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 298 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:20,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 852 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 16:02:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83799 states. [2022-01-10 16:02:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83799 to 83187. [2022-01-10 16:02:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83187 states, 83186 states have (on average 1.1194071117736157) internal successors, (93119), 83186 states have internal predecessors, (93119), 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 16:02:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83187 states to 83187 states and 93119 transitions. [2022-01-10 16:02:22,254 INFO L78 Accepts]: Start accepts. Automaton has 83187 states and 93119 transitions. Word has length 427 [2022-01-10 16:02:22,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:22,254 INFO L470 AbstractCegarLoop]: Abstraction has 83187 states and 93119 transitions. [2022-01-10 16:02:22,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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 16:02:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 83187 states and 93119 transitions. [2022-01-10 16:02:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-01-10 16:02:22,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:22,294 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-01-10 16:02:22,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 16:02:22,294 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:22,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:22,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1694506581, now seen corresponding path program 1 times [2022-01-10 16:02:22,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:22,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845775737] [2022-01-10 16:02:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:22,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-01-10 16:02:22,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845775737] [2022-01-10 16:02:22,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845775737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:22,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:02:22,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:02:22,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334331895] [2022-01-10 16:02:22,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:22,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:02:22,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:02:22,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:02:22,742 INFO L87 Difference]: Start difference. First operand 83187 states and 93119 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 16:02:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:24,136 INFO L93 Difference]: Finished difference Result 185097 states and 207045 transitions. [2022-01-10 16:02:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 432 [2022-01-10 16:02:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:24,447 INFO L225 Difference]: With dead ends: 185097 [2022-01-10 16:02:24,447 INFO L226 Difference]: Without dead ends: 93386 [2022-01-10 16:02:24,476 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 16:02:24,479 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 129 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:24,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 369 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 16:02:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93386 states. [2022-01-10 16:02:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93386 to 89114. [2022-01-10 16:02:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89114 states, 89113 states have (on average 1.0836129408728243) internal successors, (96564), 89113 states have internal predecessors, (96564), 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 16:02:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89114 states to 89114 states and 96564 transitions. [2022-01-10 16:02:25,887 INFO L78 Accepts]: Start accepts. Automaton has 89114 states and 96564 transitions. Word has length 432 [2022-01-10 16:02:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:25,888 INFO L470 AbstractCegarLoop]: Abstraction has 89114 states and 96564 transitions. [2022-01-10 16:02:25,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 16:02:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 89114 states and 96564 transitions. [2022-01-10 16:02:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-01-10 16:02:25,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:25,922 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 16:02:25,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 16:02:25,922 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:25,923 INFO L85 PathProgramCache]: Analyzing trace with hash -840131600, now seen corresponding path program 1 times [2022-01-10 16:02:25,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:25,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527283372] [2022-01-10 16:02:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:25,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 141 proven. 6 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-01-10 16:02:26,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:26,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527283372] [2022-01-10 16:02:26,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527283372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:02:26,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004782011] [2022-01-10 16:02:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:26,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:02:26,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:02:26,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 16:02:26,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 16:02:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:27,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 12595 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 16:02:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:02:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 16:02:28,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:02:28,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004782011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:28,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:02:28,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:02:28,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328273080] [2022-01-10 16:02:28,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:28,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:02:28,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:02:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:02:28,213 INFO L87 Difference]: Start difference. First operand 89114 states and 96564 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 16:02:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:29,575 INFO L93 Difference]: Finished difference Result 223182 states and 242261 transitions. [2022-01-10 16:02:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:29,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 434 [2022-01-10 16:02:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:29,755 INFO L225 Difference]: With dead ends: 223182 [2022-01-10 16:02:29,755 INFO L226 Difference]: Without dead ends: 134070 [2022-01-10 16:02:29,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 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 16:02:29,791 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 122 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:29,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 87 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 16:02:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134070 states. [2022-01-10 16:02:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134070 to 121867. [2022-01-10 16:02:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121867 states, 121866 states have (on average 1.079275597787734) internal successors, (131527), 121866 states have internal predecessors, (131527), 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 16:02:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121867 states to 121867 states and 131527 transitions. [2022-01-10 16:02:31,796 INFO L78 Accepts]: Start accepts. Automaton has 121867 states and 131527 transitions. Word has length 434 [2022-01-10 16:02:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:31,797 INFO L470 AbstractCegarLoop]: Abstraction has 121867 states and 131527 transitions. [2022-01-10 16:02:31,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 16:02:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 121867 states and 131527 transitions. [2022-01-10 16:02:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-10 16:02:31,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:31,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:31,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 16:02:32,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-10 16:02:32,063 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:32,063 INFO L85 PathProgramCache]: Analyzing trace with hash 873235222, now seen corresponding path program 1 times [2022-01-10 16:02:32,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:32,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262426122] [2022-01-10 16:02:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:32,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-01-10 16:02:32,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:32,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262426122] [2022-01-10 16:02:32,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262426122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:32,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:02:32,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:02:32,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923154423] [2022-01-10 16:02:32,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:32,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:02:32,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:32,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:02:32,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:02:32,917 INFO L87 Difference]: Start difference. First operand 121867 states and 131527 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 2 states have internal predecessors, (314), 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 16:02:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:02:34,815 INFO L93 Difference]: Finished difference Result 262665 states and 283061 transitions. [2022-01-10 16:02:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:02:34,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 2 states have internal predecessors, (314), 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 447 [2022-01-10 16:02:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:02:35,425 INFO L225 Difference]: With dead ends: 262665 [2022-01-10 16:02:35,425 INFO L226 Difference]: Without dead ends: 140800 [2022-01-10 16:02:35,459 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 16:02:35,460 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 115 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 16:02:35,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 124 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 16:02:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140800 states. [2022-01-10 16:02:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140800 to 133490. [2022-01-10 16:02:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133490 states, 133489 states have (on average 1.0794896957801767) internal successors, (144100), 133489 states have internal predecessors, (144100), 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 16:02:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133490 states to 133490 states and 144100 transitions. [2022-01-10 16:02:37,613 INFO L78 Accepts]: Start accepts. Automaton has 133490 states and 144100 transitions. Word has length 447 [2022-01-10 16:02:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:02:37,614 INFO L470 AbstractCegarLoop]: Abstraction has 133490 states and 144100 transitions. [2022-01-10 16:02:37,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 2 states have internal predecessors, (314), 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 16:02:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 133490 states and 144100 transitions. [2022-01-10 16:02:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-01-10 16:02:37,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:02:37,674 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 16:02:37,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 16:02:37,675 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:02:37,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:02:37,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1378506391, now seen corresponding path program 1 times [2022-01-10 16:02:37,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:02:37,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233089714] [2022-01-10 16:02:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:02:37,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:02:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:02:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-01-10 16:02:37,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:02:37,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233089714] [2022-01-10 16:02:37,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233089714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:02:37,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:02:37,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:02:37,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004057761] [2022-01-10 16:02:37,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:02:37,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 16:02:37,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:02:37,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 16:02:37,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 16:02:37,966 INFO L87 Difference]: Start difference. First operand 133490 states and 144100 transitions. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 3 states have internal predecessors, (315), 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)