/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_SUM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 03:38:14,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 03:38:14,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 03:38:14,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 03:38:14,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 03:38:14,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 03:38:14,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 03:38:14,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 03:38:14,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 03:38:14,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 03:38:14,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 03:38:14,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 03:38:14,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 03:38:14,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 03:38:14,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 03:38:14,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 03:38:14,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 03:38:14,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 03:38:14,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 03:38:14,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 03:38:14,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 03:38:14,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 03:38:14,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 03:38:14,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 03:38:14,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 03:38:14,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 03:38:14,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 03:38:14,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 03:38:14,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 03:38:14,549 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 03:38:14,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 03:38:14,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 03:38:14,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 03:38:14,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 03:38:14,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 03:38:14,550 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 03:38:14,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 03:38:14,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 03:38:14,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 03:38:14,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 03:38:14,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 03:38:14,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 03:38:14,551 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 03:38:14,552 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 03:38:14,552 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 03:38:14,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 03:38:14,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 03:38:14,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 03:38:14,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 03:38:14,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 03:38:14,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 03:38:14,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 03:38:14,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 03:38:14,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 03:38:14,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 03:38:14,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 03:38:14,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 03:38:14,553 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 03:38:14,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 03:38:14,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 03:38:14,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 03:38:14,554 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 03:38:14,555 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 03:38:14,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 03:38:14,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 03:38:14,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 03:38:14,738 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 03:38:14,739 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 03:38:14,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label25.c [2022-01-11 03:38:14,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82e57d0c/dcc4ab7706094859a5a444e1db09ace5/FLAG52f9ef89c [2022-01-11 03:38:15,220 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 03:38:15,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label25.c [2022-01-11 03:38:15,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82e57d0c/dcc4ab7706094859a5a444e1db09ace5/FLAG52f9ef89c [2022-01-11 03:38:15,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82e57d0c/dcc4ab7706094859a5a444e1db09ace5 [2022-01-11 03:38:15,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 03:38:15,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 03:38:15,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 03:38:15,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 03:38:15,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 03:38:15,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:38:15" (1/1) ... [2022-01-11 03:38:15,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d3512f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:15, skipping insertion in model container [2022-01-11 03:38:15,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:38:15" (1/1) ... [2022-01-11 03:38:15,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 03:38:15,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 03:38:16,012 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_label25.c[58529,58542] [2022-01-11 03:38:16,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 03:38:16,039 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 03:38:16,186 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_label25.c[58529,58542] [2022-01-11 03:38:16,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 03:38:16,223 INFO L208 MainTranslator]: Completed translation [2022-01-11 03:38:16,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16 WrapperNode [2022-01-11 03:38:16,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 03:38:16,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 03:38:16,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 03:38:16,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 03:38:16,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,347 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-11 03:38:16,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 03:38:16,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 03:38:16,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 03:38:16,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 03:38:16,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 03:38:16,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 03:38:16,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 03:38:16,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 03:38:16,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (1/1) ... [2022-01-11 03:38:16,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 03:38:16,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:38:16,465 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) [2022-01-11 03:38:16,477 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 [2022-01-11 03:38:16,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 03:38:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 03:38:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 03:38:16,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 03:38:16,559 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 03:38:16,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 03:38:18,224 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 03:38:18,236 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 03:38:18,236 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-11 03:38:18,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:38:18 BoogieIcfgContainer [2022-01-11 03:38:18,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 03:38:18,239 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 03:38:18,239 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 03:38:18,240 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 03:38:18,242 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:38:18" (1/1) ... [2022-01-11 03:38:18,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:38:18 BasicIcfg [2022-01-11 03:38:18,594 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 03:38:18,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 03:38:18,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 03:38:18,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 03:38:18,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 03:38:15" (1/4) ... [2022-01-11 03:38:18,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b40cbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:38:18, skipping insertion in model container [2022-01-11 03:38:18,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:38:16" (2/4) ... [2022-01-11 03:38:18,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b40cbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:38:18, skipping insertion in model container [2022-01-11 03:38:18,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:38:18" (3/4) ... [2022-01-11 03:38:18,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b40cbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 03:38:18, skipping insertion in model container [2022-01-11 03:38:18,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:38:18" (4/4) ... [2022-01-11 03:38:18,601 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label25.cTransformedIcfg [2022-01-11 03:38:18,604 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 03:38:18,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 03:38:18,644 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 03:38:18,651 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 [2022-01-11 03:38:18,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 03:38:18,667 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) [2022-01-11 03:38:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-11 03:38:18,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:18,680 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] [2022-01-11 03:38:18,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:18,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash 471433566, now seen corresponding path program 1 times [2022-01-11 03:38:18,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:18,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037025391] [2022-01-11 03:38:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:18,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:38:19,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:19,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037025391] [2022-01-11 03:38:19,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037025391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:19,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:19,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:38:19,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268831960] [2022-01-11 03:38:19,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:19,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:19,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:19,369 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 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:20,482 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2022-01-11 03:38:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:20,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2022-01-11 03:38:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:20,494 INFO L225 Difference]: With dead ends: 864 [2022-01-11 03:38:20,494 INFO L226 Difference]: Without dead ends: 468 [2022-01-11 03:38:20,511 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 [2022-01-11 03:38:20,518 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 98 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:20,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 165 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-11 03:38:20,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-11 03:38:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2022-01-11 03:38:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2022-01-11 03:38:20,615 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 180 [2022-01-11 03:38:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:20,630 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2022-01-11 03:38:20,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2022-01-11 03:38:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-11 03:38:20,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:20,634 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] [2022-01-11 03:38:20,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 03:38:20,634 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash 521067400, now seen corresponding path program 1 times [2022-01-11 03:38:20,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:20,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699376826] [2022-01-11 03:38:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:20,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:38:20,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:20,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699376826] [2022-01-11 03:38:20,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699376826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:20,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:20,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:38:20,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955826906] [2022-01-11 03:38:20,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:20,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:20,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:20,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:20,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:20,861 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:21,165 INFO L93 Difference]: Finished difference Result 1345 states and 2190 transitions. [2022-01-11 03:38:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:21,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2022-01-11 03:38:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:21,173 INFO L225 Difference]: With dead ends: 1345 [2022-01-11 03:38:21,173 INFO L226 Difference]: Without dead ends: 893 [2022-01-11 03:38:21,174 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 [2022-01-11 03:38:21,175 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:21,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 03:38:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-11 03:38:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 891. [2022-01-11 03:38:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.6258426966292134) internal successors, (1447), 890 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1447 transitions. [2022-01-11 03:38:21,226 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1447 transitions. Word has length 185 [2022-01-11 03:38:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:21,227 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1447 transitions. [2022-01-11 03:38:21,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1447 transitions. [2022-01-11 03:38:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-11 03:38:21,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:21,254 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-11 03:38:21,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 03:38:21,256 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash -400477467, now seen corresponding path program 1 times [2022-01-11 03:38:21,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:21,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864097428] [2022-01-11 03:38:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:21,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:38:21,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:21,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864097428] [2022-01-11 03:38:21,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864097428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:21,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:21,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:38:21,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441149830] [2022-01-11 03:38:21,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:21,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:21,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:21,411 INFO L87 Difference]: Start difference. First operand 891 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:22,287 INFO L93 Difference]: Finished difference Result 2620 states and 4271 transitions. [2022-01-11 03:38:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:22,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 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 186 [2022-01-11 03:38:22,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:22,292 INFO L225 Difference]: With dead ends: 2620 [2022-01-11 03:38:22,292 INFO L226 Difference]: Without dead ends: 1731 [2022-01-11 03:38:22,294 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 [2022-01-11 03:38:22,295 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 252 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:22,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 162 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-11 03:38:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-01-11 03:38:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1726. [2022-01-11 03:38:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.5217391304347827) internal successors, (2625), 1725 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2625 transitions. [2022-01-11 03:38:22,323 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2625 transitions. Word has length 186 [2022-01-11 03:38:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:22,323 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2625 transitions. [2022-01-11 03:38:22,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2625 transitions. [2022-01-11 03:38:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-11 03:38:22,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:22,326 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] [2022-01-11 03:38:22,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 03:38:22,327 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1777827394, now seen corresponding path program 1 times [2022-01-11 03:38:22,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:22,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153964804] [2022-01-11 03:38:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:22,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:38:22,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:22,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153964804] [2022-01-11 03:38:22,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153964804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:22,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:22,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:38:22,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456860524] [2022-01-11 03:38:22,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:22,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:22,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:22,447 INFO L87 Difference]: Start difference. First operand 1726 states and 2625 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:23,539 INFO L93 Difference]: Finished difference Result 5105 states and 7793 transitions. [2022-01-11 03:38:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:23,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 188 [2022-01-11 03:38:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:23,551 INFO L225 Difference]: With dead ends: 5105 [2022-01-11 03:38:23,551 INFO L226 Difference]: Without dead ends: 3381 [2022-01-11 03:38:23,553 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 [2022-01-11 03:38:23,561 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:23,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 94 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-11 03:38:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2022-01-11 03:38:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 3352. [2022-01-11 03:38:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 1.495971351835273) internal successors, (5013), 3351 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 5013 transitions. [2022-01-11 03:38:23,616 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 5013 transitions. Word has length 188 [2022-01-11 03:38:23,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:23,617 INFO L470 AbstractCegarLoop]: Abstraction has 3352 states and 5013 transitions. [2022-01-11 03:38:23,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:23,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 5013 transitions. [2022-01-11 03:38:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-11 03:38:23,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:23,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-11 03:38:23,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 03:38:23,622 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:23,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:23,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1584637020, now seen corresponding path program 1 times [2022-01-11 03:38:23,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:23,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216435493] [2022-01-11 03:38:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:23,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 03:38:23,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:23,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216435493] [2022-01-11 03:38:23,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216435493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:23,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:23,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:38:23,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931906978] [2022-01-11 03:38:23,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:23,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:23,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:23,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:23,741 INFO L87 Difference]: Start difference. First operand 3352 states and 5013 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:24,745 INFO L93 Difference]: Finished difference Result 8343 states and 12434 transitions. [2022-01-11 03:38:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:24,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 197 [2022-01-11 03:38:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:24,766 INFO L225 Difference]: With dead ends: 8343 [2022-01-11 03:38:24,766 INFO L226 Difference]: Without dead ends: 4993 [2022-01-11 03:38:24,772 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 [2022-01-11 03:38:24,777 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:24,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 117 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-11 03:38:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-01-11 03:38:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4991. [2022-01-11 03:38:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4991 states, 4990 states have (on average 1.4627254509018035) internal successors, (7299), 4990 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4991 states to 4991 states and 7299 transitions. [2022-01-11 03:38:24,866 INFO L78 Accepts]: Start accepts. Automaton has 4991 states and 7299 transitions. Word has length 197 [2022-01-11 03:38:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:24,866 INFO L470 AbstractCegarLoop]: Abstraction has 4991 states and 7299 transitions. [2022-01-11 03:38:24,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4991 states and 7299 transitions. [2022-01-11 03:38:24,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-11 03:38:24,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:24,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:38:24,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-11 03:38:24,874 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1243185672, now seen corresponding path program 1 times [2022-01-11 03:38:24,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:24,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285546497] [2022-01-11 03:38:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:24,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:38:24,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:24,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285546497] [2022-01-11 03:38:24,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285546497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:24,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:24,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:38:24,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160564326] [2022-01-11 03:38:24,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:24,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:24,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:24,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:24,961 INFO L87 Difference]: Start difference. First operand 4991 states and 7299 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:25,875 INFO L93 Difference]: Finished difference Result 14856 states and 21741 transitions. [2022-01-11 03:38:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:25,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 199 [2022-01-11 03:38:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:25,903 INFO L225 Difference]: With dead ends: 14856 [2022-01-11 03:38:25,903 INFO L226 Difference]: Without dead ends: 9867 [2022-01-11 03:38:25,912 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 [2022-01-11 03:38:25,912 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 228 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:25,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 165 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-11 03:38:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2022-01-11 03:38:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 9864. [2022-01-11 03:38:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9864 states, 9863 states have (on average 1.3184629423096421) internal successors, (13004), 9863 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9864 states to 9864 states and 13004 transitions. [2022-01-11 03:38:26,105 INFO L78 Accepts]: Start accepts. Automaton has 9864 states and 13004 transitions. Word has length 199 [2022-01-11 03:38:26,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:26,105 INFO L470 AbstractCegarLoop]: Abstraction has 9864 states and 13004 transitions. [2022-01-11 03:38:26,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:26,106 INFO L276 IsEmpty]: Start isEmpty. Operand 9864 states and 13004 transitions. [2022-01-11 03:38:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-11 03:38:26,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:26,119 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] [2022-01-11 03:38:26,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-11 03:38:26,120 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash 545087226, now seen corresponding path program 1 times [2022-01-11 03:38:26,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:26,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704713425] [2022-01-11 03:38:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:26,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 03:38:26,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:26,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704713425] [2022-01-11 03:38:26,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704713425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:26,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:26,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 03:38:26,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849700332] [2022-01-11 03:38:26,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:26,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:26,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:26,231 INFO L87 Difference]: Start difference. First operand 9864 states and 13004 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:27,274 INFO L93 Difference]: Finished difference Result 28667 states and 37818 transitions. [2022-01-11 03:38:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 202 [2022-01-11 03:38:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:27,305 INFO L225 Difference]: With dead ends: 28667 [2022-01-11 03:38:27,305 INFO L226 Difference]: Without dead ends: 18805 [2022-01-11 03:38:27,315 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 [2022-01-11 03:38:27,315 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 256 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:27,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 398 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-11 03:38:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18805 states. [2022-01-11 03:38:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18805 to 18803. [2022-01-11 03:38:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18803 states, 18802 states have (on average 1.2518349111796618) internal successors, (23537), 18802 states have internal predecessors, (23537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18803 states to 18803 states and 23537 transitions. [2022-01-11 03:38:27,535 INFO L78 Accepts]: Start accepts. Automaton has 18803 states and 23537 transitions. Word has length 202 [2022-01-11 03:38:27,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:27,535 INFO L470 AbstractCegarLoop]: Abstraction has 18803 states and 23537 transitions. [2022-01-11 03:38:27,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18803 states and 23537 transitions. [2022-01-11 03:38:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-11 03:38:27,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:27,552 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2022-01-11 03:38:27,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-11 03:38:27,553 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:27,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2103218748, now seen corresponding path program 2 times [2022-01-11 03:38:27,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:27,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991704097] [2022-01-11 03:38:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:27,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 03:38:27,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:27,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991704097] [2022-01-11 03:38:27,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991704097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:27,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:27,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 03:38:27,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132717764] [2022-01-11 03:38:27,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:27,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:27,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:27,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:27,746 INFO L87 Difference]: Start difference. First operand 18803 states and 23537 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:28,663 INFO L93 Difference]: Finished difference Result 45525 states and 56065 transitions. [2022-01-11 03:38:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:28,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 [2022-01-11 03:38:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:28,709 INFO L225 Difference]: With dead ends: 45525 [2022-01-11 03:38:28,709 INFO L226 Difference]: Without dead ends: 26724 [2022-01-11 03:38:28,728 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 [2022-01-11 03:38:28,728 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 231 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:28,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 415 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-11 03:38:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26724 states. [2022-01-11 03:38:29,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26724 to 23878. [2022-01-11 03:38:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23878 states, 23877 states have (on average 1.2223478661473384) internal successors, (29186), 23877 states have internal predecessors, (29186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23878 states to 23878 states and 29186 transitions. [2022-01-11 03:38:29,060 INFO L78 Accepts]: Start accepts. Automaton has 23878 states and 29186 transitions. Word has length 204 [2022-01-11 03:38:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:29,062 INFO L470 AbstractCegarLoop]: Abstraction has 23878 states and 29186 transitions. [2022-01-11 03:38:29,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 23878 states and 29186 transitions. [2022-01-11 03:38:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-11 03:38:29,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:29,086 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-01-11 03:38:29,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-11 03:38:29,086 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1079731591, now seen corresponding path program 1 times [2022-01-11 03:38:29,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:29,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144167026] [2022-01-11 03:38:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:29,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-11 03:38:29,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:29,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144167026] [2022-01-11 03:38:29,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144167026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:29,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:29,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:38:29,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767347874] [2022-01-11 03:38:29,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:29,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:29,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:29,198 INFO L87 Difference]: Start difference. First operand 23878 states and 29186 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) [2022-01-11 03:38:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:30,140 INFO L93 Difference]: Finished difference Result 47756 states and 58374 transitions. [2022-01-11 03:38:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:30,140 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 229 [2022-01-11 03:38:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:30,179 INFO L225 Difference]: With dead ends: 47756 [2022-01-11 03:38:30,179 INFO L226 Difference]: Without dead ends: 23880 [2022-01-11 03:38:30,197 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 [2022-01-11 03:38:30,198 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 234 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:30,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 148 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-11 03:38:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23880 states. [2022-01-11 03:38:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23880 to 23472. [2022-01-11 03:38:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23472 states, 23471 states have (on average 1.1846534020706403) internal successors, (27805), 23471 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23472 states to 23472 states and 27805 transitions. [2022-01-11 03:38:30,449 INFO L78 Accepts]: Start accepts. Automaton has 23472 states and 27805 transitions. Word has length 229 [2022-01-11 03:38:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:30,449 INFO L470 AbstractCegarLoop]: Abstraction has 23472 states and 27805 transitions. [2022-01-11 03:38:30,449 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) [2022-01-11 03:38:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 23472 states and 27805 transitions. [2022-01-11 03:38:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-11 03:38:30,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:30,527 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:38:30,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-11 03:38:30,527 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2009785397, now seen corresponding path program 1 times [2022-01-11 03:38:30,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:30,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070220916] [2022-01-11 03:38:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:30,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-11 03:38:30,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:30,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070220916] [2022-01-11 03:38:30,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070220916] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:30,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:30,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 03:38:30,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452455460] [2022-01-11 03:38:30,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:30,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 03:38:30,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:30,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 03:38:30,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:38:30,672 INFO L87 Difference]: Start difference. First operand 23472 states and 27805 transitions. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:32,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:32,141 INFO L93 Difference]: Finished difference Result 83415 states and 99218 transitions. [2022-01-11 03:38:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 03:38:32,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 247 [2022-01-11 03:38:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:32,230 INFO L225 Difference]: With dead ends: 83415 [2022-01-11 03:38:32,230 INFO L226 Difference]: Without dead ends: 59945 [2022-01-11 03:38:32,257 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 [2022-01-11 03:38:32,258 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 733 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:32,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 402 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-11 03:38:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59945 states. [2022-01-11 03:38:32,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59945 to 59938. [2022-01-11 03:38:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59938 states, 59937 states have (on average 1.1859619266896908) internal successors, (71083), 59937 states have internal predecessors, (71083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59938 states to 59938 states and 71083 transitions. [2022-01-11 03:38:33,252 INFO L78 Accepts]: Start accepts. Automaton has 59938 states and 71083 transitions. Word has length 247 [2022-01-11 03:38:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:33,253 INFO L470 AbstractCegarLoop]: Abstraction has 59938 states and 71083 transitions. [2022-01-11 03:38:33,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 59938 states and 71083 transitions. [2022-01-11 03:38:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-11 03:38:33,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:33,373 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, 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] [2022-01-11 03:38:33,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-11 03:38:33,374 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1042828399, now seen corresponding path program 1 times [2022-01-11 03:38:33,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:33,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584031128] [2022-01-11 03:38:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:33,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-11 03:38:33,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584031128] [2022-01-11 03:38:33,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584031128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:33,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:33,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 03:38:33,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182553078] [2022-01-11 03:38:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:33,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 03:38:33,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 03:38:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:38:33,495 INFO L87 Difference]: Start difference. First operand 59938 states and 71083 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:35,383 INFO L93 Difference]: Finished difference Result 177794 states and 211152 transitions. [2022-01-11 03:38:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 03:38:35,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 248 [2022-01-11 03:38:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:35,606 INFO L225 Difference]: With dead ends: 177794 [2022-01-11 03:38:35,607 INFO L226 Difference]: Without dead ends: 117858 [2022-01-11 03:38:35,667 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 [2022-01-11 03:38:35,671 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 573 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:35,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 563 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-11 03:38:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117858 states. [2022-01-11 03:38:37,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117858 to 116157. [2022-01-11 03:38:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116157 states, 116156 states have (on average 1.181841661214229) internal successors, (137278), 116156 states have internal predecessors, (137278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116157 states to 116157 states and 137278 transitions. [2022-01-11 03:38:37,858 INFO L78 Accepts]: Start accepts. Automaton has 116157 states and 137278 transitions. Word has length 248 [2022-01-11 03:38:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:37,858 INFO L470 AbstractCegarLoop]: Abstraction has 116157 states and 137278 transitions. [2022-01-11 03:38:37,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 116157 states and 137278 transitions. [2022-01-11 03:38:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-11 03:38:37,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:37,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-11 03:38:37,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-11 03:38:37,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1704403168, now seen corresponding path program 1 times [2022-01-11 03:38:37,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:37,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724387913] [2022-01-11 03:38:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:37,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-11 03:38:38,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:38,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724387913] [2022-01-11 03:38:38,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724387913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:38,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:38,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 03:38:38,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064185766] [2022-01-11 03:38:38,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:38,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 03:38:38,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 03:38:38,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:38:38,051 INFO L87 Difference]: Start difference. First operand 116157 states and 137278 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:40,166 INFO L93 Difference]: Finished difference Result 252033 states and 296255 transitions. [2022-01-11 03:38:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 03:38:40,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2022-01-11 03:38:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:40,375 INFO L225 Difference]: With dead ends: 252033 [2022-01-11 03:38:40,376 INFO L226 Difference]: Without dead ends: 135878 [2022-01-11 03:38:40,419 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 [2022-01-11 03:38:40,420 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 654 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:40,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 185 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-11 03:38:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135878 states. [2022-01-11 03:38:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135878 to 126307. [2022-01-11 03:38:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126307 states, 126306 states have (on average 1.1696514813231358) internal successors, (147734), 126306 states have internal predecessors, (147734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:42,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126307 states to 126307 states and 147734 transitions. [2022-01-11 03:38:42,464 INFO L78 Accepts]: Start accepts. Automaton has 126307 states and 147734 transitions. Word has length 271 [2022-01-11 03:38:42,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:42,465 INFO L470 AbstractCegarLoop]: Abstraction has 126307 states and 147734 transitions. [2022-01-11 03:38:42,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:42,465 INFO L276 IsEmpty]: Start isEmpty. Operand 126307 states and 147734 transitions. [2022-01-11 03:38:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-11 03:38:42,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:42,507 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:38:42,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-11 03:38:42,507 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1435856361, now seen corresponding path program 1 times [2022-01-11 03:38:42,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:42,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237072016] [2022-01-11 03:38:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:42,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-11 03:38:42,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:42,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237072016] [2022-01-11 03:38:42,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237072016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:42,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:42,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 03:38:42,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914154724] [2022-01-11 03:38:42,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:42,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:42,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:42,712 INFO L87 Difference]: Start difference. First operand 126307 states and 147734 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:44,998 INFO L93 Difference]: Finished difference Result 292657 states and 342458 transitions. [2022-01-11 03:38:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:38:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 280 [2022-01-11 03:38:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:45,255 INFO L225 Difference]: With dead ends: 292657 [2022-01-11 03:38:45,255 INFO L226 Difference]: Without dead ends: 166352 [2022-01-11 03:38:45,286 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 [2022-01-11 03:38:45,290 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 156 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:45,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 206 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-11 03:38:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166352 states. [2022-01-11 03:38:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166352 to 164307. [2022-01-11 03:38:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164307 states, 164306 states have (on average 1.159087312697041) internal successors, (190445), 164306 states have internal predecessors, (190445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164307 states to 164307 states and 190445 transitions. [2022-01-11 03:38:47,875 INFO L78 Accepts]: Start accepts. Automaton has 164307 states and 190445 transitions. Word has length 280 [2022-01-11 03:38:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:47,875 INFO L470 AbstractCegarLoop]: Abstraction has 164307 states and 190445 transitions. [2022-01-11 03:38:47,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 164307 states and 190445 transitions. [2022-01-11 03:38:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-11 03:38:47,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:47,926 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-11 03:38:47,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-11 03:38:47,926 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:47,940 INFO L85 PathProgramCache]: Analyzing trace with hash 542094978, now seen corresponding path program 1 times [2022-01-11 03:38:47,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:47,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635620834] [2022-01-11 03:38:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:47,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-11 03:38:48,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:48,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635620834] [2022-01-11 03:38:48,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635620834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:48,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:48,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 03:38:48,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170486368] [2022-01-11 03:38:48,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:48,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 03:38:48,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:48,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 03:38:48,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:38:48,203 INFO L87 Difference]: Start difference. First operand 164307 states and 190445 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:38:51,809 INFO L93 Difference]: Finished difference Result 503738 states and 583545 transitions. [2022-01-11 03:38:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 03:38:51,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2022-01-11 03:38:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:38:52,673 INFO L225 Difference]: With dead ends: 503738 [2022-01-11 03:38:52,674 INFO L226 Difference]: Without dead ends: 339433 [2022-01-11 03:38:52,766 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 [2022-01-11 03:38:52,767 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 556 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-11 03:38:52,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 137 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-11 03:38:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339433 states. [2022-01-11 03:38:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339433 to 337374. [2022-01-11 03:38:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337374 states, 337373 states have (on average 1.1545766851526351) internal successors, (389523), 337373 states have internal predecessors, (389523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337374 states to 337374 states and 389523 transitions. [2022-01-11 03:38:58,036 INFO L78 Accepts]: Start accepts. Automaton has 337374 states and 389523 transitions. Word has length 281 [2022-01-11 03:38:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:38:58,036 INFO L470 AbstractCegarLoop]: Abstraction has 337374 states and 389523 transitions. [2022-01-11 03:38:58,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:38:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 337374 states and 389523 transitions. [2022-01-11 03:38:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-01-11 03:38:58,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:38:58,057 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-11 03:38:58,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-11 03:38:58,058 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:38:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:38:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash -564324603, now seen corresponding path program 1 times [2022-01-11 03:38:58,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:38:58,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717367803] [2022-01-11 03:38:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:38:58,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:38:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:38:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-11 03:38:58,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:38:58,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717367803] [2022-01-11 03:38:58,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717367803] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:38:58,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:38:58,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:38:58,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101522652] [2022-01-11 03:38:58,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:38:58,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:38:58,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:38:58,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:38:58,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:38:58,489 INFO L87 Difference]: Start difference. First operand 337374 states and 389523 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:39:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:39:02,155 INFO L93 Difference]: Finished difference Result 755538 states and 871829 transitions. [2022-01-11 03:39:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:39:02,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 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 282 [2022-01-11 03:39:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:39:03,444 INFO L225 Difference]: With dead ends: 755538 [2022-01-11 03:39:03,445 INFO L226 Difference]: Without dead ends: 418166 [2022-01-11 03:39:03,611 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 [2022-01-11 03:39:03,612 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 220 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-11 03:39:03,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 148 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-11 03:39:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418166 states. [2022-01-11 03:39:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418166 to 418151. [2022-01-11 03:39:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418151 states, 418150 states have (on average 1.1519741719478656) internal successors, (481698), 418150 states have internal predecessors, (481698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:39:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418151 states to 418151 states and 481698 transitions. [2022-01-11 03:39:11,173 INFO L78 Accepts]: Start accepts. Automaton has 418151 states and 481698 transitions. Word has length 282 [2022-01-11 03:39:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:39:11,173 INFO L470 AbstractCegarLoop]: Abstraction has 418151 states and 481698 transitions. [2022-01-11 03:39:11,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:39:11,173 INFO L276 IsEmpty]: Start isEmpty. Operand 418151 states and 481698 transitions. [2022-01-11 03:39:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-11 03:39:11,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:39:11,204 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:39:11,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-11 03:39:11,205 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:39:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:39:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1616523117, now seen corresponding path program 1 times [2022-01-11 03:39:11,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:39:11,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454565192] [2022-01-11 03:39:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:39:11,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:39:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:39:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-11 03:39:11,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:39:11,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454565192] [2022-01-11 03:39:11,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454565192] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:39:11,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:39:11,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 03:39:11,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623634679] [2022-01-11 03:39:11,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:39:11,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 03:39:11,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:39:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 03:39:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:39:11,966 INFO L87 Difference]: Start difference. First operand 418151 states and 481698 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)