/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_BITWISE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 10:12:55,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 10:12:55,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 10:12:55,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 10:12:55,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 10:12:55,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 10:12:55,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 10:12:55,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 10:12:55,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 10:12:55,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 10:12:55,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 10:12:55,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 10:12:55,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 10:12:55,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 10:12:55,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 10:12:55,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 10:12:55,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 10:12:55,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 10:12:55,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 10:12:55,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 10:12:55,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 10:12:55,301 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 10:12:55,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 10:12:55,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 10:12:55,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 10:12:55,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 10:12:55,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 10:12:55,303 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 10:12:55,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 10:12:55,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 10:12:55,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 10:12:55,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 10:12:55,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 10:12:55,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 10:12:55,304 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 10:12:55,304 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 10:12:55,304 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 10:12:55,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 10:12:55,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 10:12:55,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 10:12:55,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 10:12:55,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 10:12:55,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:12:55,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 10:12:55,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 10:12:55,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 10:12:55,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 10:12:55,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 10:12:55,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 10:12:55,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 10:12:55,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 10:12:55,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 10:12:55,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 10:12:55,307 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 10:12:55,307 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 10:12:55,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 10:12:55,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 10:12:55,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 10:12:55,552 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 10:12:55,554 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 10:12:55,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label57.c [2022-01-10 10:12:55,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3eecfa8/892abddba49548c6a599d49bc62639c0/FLAG18102b648 [2022-01-10 10:12:56,134 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 10:12:56,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label57.c [2022-01-10 10:12:56,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3eecfa8/892abddba49548c6a599d49bc62639c0/FLAG18102b648 [2022-01-10 10:12:56,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3eecfa8/892abddba49548c6a599d49bc62639c0 [2022-01-10 10:12:56,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 10:12:56,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 10:12:56,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 10:12:56,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 10:12:56,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 10:12:56,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:12:56" (1/1) ... [2022-01-10 10:12:56,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@980bdfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:56, skipping insertion in model container [2022-01-10 10:12:56,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:12:56" (1/1) ... [2022-01-10 10:12:56,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 10:12:56,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 10:12:57,174 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_label57.c[55951,55964] [2022-01-10 10:12:57,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:12:57,220 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 10:12:57,399 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_label57.c[55951,55964] [2022-01-10 10:12:57,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:12:57,434 INFO L208 MainTranslator]: Completed translation [2022-01-10 10:12:57,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57 WrapperNode [2022-01-10 10:12:57,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 10:12:57,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 10:12:57,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 10:12:57,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 10:12:57,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,563 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 10:12:57,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 10:12:57,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 10:12:57,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 10:12:57,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 10:12:57,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 10:12:57,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 10:12:57,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 10:12:57,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 10:12:57,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (1/1) ... [2022-01-10 10:12:57,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:12:57,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:12:57,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 10:12:57,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 10:12:57,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 10:12:57,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 10:12:57,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 10:12:57,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 10:12:57,884 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 10:12:57,886 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 10:12:59,625 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 10:12:59,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 10:12:59,634 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 10:12:59,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:12:59 BoogieIcfgContainer [2022-01-10 10:12:59,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 10:12:59,636 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 10:12:59,636 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 10:12:59,637 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 10:12:59,640 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:12:59" (1/1) ... [2022-01-10 10:13:00,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:13:00 BasicIcfg [2022-01-10 10:13:00,051 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 10:13:00,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 10:13:00,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 10:13:00,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 10:13:00,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 10:12:56" (1/4) ... [2022-01-10 10:13:00,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a4e2b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:13:00, skipping insertion in model container [2022-01-10 10:13:00,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:12:57" (2/4) ... [2022-01-10 10:13:00,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a4e2b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:13:00, skipping insertion in model container [2022-01-10 10:13:00,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:12:59" (3/4) ... [2022-01-10 10:13:00,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a4e2b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 10:13:00, skipping insertion in model container [2022-01-10 10:13:00,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:13:00" (4/4) ... [2022-01-10 10:13:00,059 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label57.cTransformedIcfg [2022-01-10 10:13:00,063 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 10:13:00,064 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 10:13:00,113 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 10:13:00,119 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 10:13:00,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 10:13:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:00,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 10:13:00,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:00,160 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] [2022-01-10 10:13:00,161 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:00,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2091959815, now seen corresponding path program 1 times [2022-01-10 10:13:00,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:00,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349952837] [2022-01-10 10:13:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:00,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:13:00,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:00,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349952837] [2022-01-10 10:13:00,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349952837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:00,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:00,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:13:00,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914223703] [2022-01-10 10:13:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:00,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:00,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:00,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:00,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:00,946 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 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:02,362 INFO L93 Difference]: Finished difference Result 860 states and 1507 transitions. [2022-01-10 10:13:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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 161 [2022-01-10 10:13:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:02,376 INFO L225 Difference]: With dead ends: 860 [2022-01-10 10:13:02,377 INFO L226 Difference]: Without dead ends: 465 [2022-01-10 10:13:02,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:02,383 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 143 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:02,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 169 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 10:13:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-10 10:13:02,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 459. [2022-01-10 10:13:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.556768558951965) internal successors, (713), 458 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 713 transitions. [2022-01-10 10:13:02,439 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 713 transitions. Word has length 161 [2022-01-10 10:13:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:02,440 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 713 transitions. [2022-01-10 10:13:02,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 713 transitions. [2022-01-10 10:13:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 10:13:02,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:02,444 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] [2022-01-10 10:13:02,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 10:13:02,444 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:02,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1781445725, now seen corresponding path program 1 times [2022-01-10 10:13:02,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:02,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758466140] [2022-01-10 10:13:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:02,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:13:02,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:02,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758466140] [2022-01-10 10:13:02,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758466140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:02,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:02,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:13:02,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658854462] [2022-01-10 10:13:02,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:02,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:02,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:02,584 INFO L87 Difference]: Start difference. First operand 459 states and 713 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:03,622 INFO L93 Difference]: Finished difference Result 1343 states and 2102 transitions. [2022-01-10 10:13:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:03,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 169 [2022-01-10 10:13:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:03,626 INFO L225 Difference]: With dead ends: 1343 [2022-01-10 10:13:03,626 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 10:13:03,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:03,628 INFO L933 BasicCegarLoop]: 78 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, 93 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 [2022-01-10 10:13:03,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 93 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:13:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 10:13:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 868. [2022-01-10 10:13:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.532871972318339) internal successors, (1329), 867 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1329 transitions. [2022-01-10 10:13:03,655 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1329 transitions. Word has length 169 [2022-01-10 10:13:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:03,656 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1329 transitions. [2022-01-10 10:13:03,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1329 transitions. [2022-01-10 10:13:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-10 10:13:03,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:03,661 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 10:13:03,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 10:13:03,661 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash -756725211, now seen corresponding path program 1 times [2022-01-10 10:13:03,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:03,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985986143] [2022-01-10 10:13:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:03,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:13:03,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:03,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985986143] [2022-01-10 10:13:03,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985986143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:03,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:03,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:13:03,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577786979] [2022-01-10 10:13:03,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:03,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:03,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:03,795 INFO L87 Difference]: Start difference. First operand 868 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:04,334 INFO L93 Difference]: Finished difference Result 1710 states and 2622 transitions. [2022-01-10 10:13:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 174 [2022-01-10 10:13:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:04,339 INFO L225 Difference]: With dead ends: 1710 [2022-01-10 10:13:04,339 INFO L226 Difference]: Without dead ends: 844 [2022-01-10 10:13:04,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:04,341 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:04,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 10:13:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-01-10 10:13:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2022-01-10 10:13:04,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 1.4768683274021353) internal successors, (1245), 843 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1245 transitions. [2022-01-10 10:13:04,367 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1245 transitions. Word has length 174 [2022-01-10 10:13:04,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:04,367 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1245 transitions. [2022-01-10 10:13:04,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:04,368 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1245 transitions. [2022-01-10 10:13:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-10 10:13:04,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:04,371 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 10:13:04,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 10:13:04,372 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash -624943805, now seen corresponding path program 1 times [2022-01-10 10:13:04,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:04,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735455954] [2022-01-10 10:13:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:04,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 10:13:04,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:04,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735455954] [2022-01-10 10:13:04,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735455954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:04,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:04,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:13:04,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600469640] [2022-01-10 10:13:04,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:04,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:04,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:04,529 INFO L87 Difference]: Start difference. First operand 844 states and 1245 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:05,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:05,521 INFO L93 Difference]: Finished difference Result 2517 states and 3716 transitions. [2022-01-10 10:13:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:05,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 175 [2022-01-10 10:13:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:05,528 INFO L225 Difference]: With dead ends: 2517 [2022-01-10 10:13:05,528 INFO L226 Difference]: Without dead ends: 1675 [2022-01-10 10:13:05,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:05,531 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 243 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:05,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 93 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:13:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-01-10 10:13:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1672. [2022-01-10 10:13:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.4111310592459605) internal successors, (2358), 1671 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2358 transitions. [2022-01-10 10:13:05,572 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2358 transitions. Word has length 175 [2022-01-10 10:13:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:05,573 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2358 transitions. [2022-01-10 10:13:05,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:05,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2358 transitions. [2022-01-10 10:13:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-10 10:13:05,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:05,576 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 10:13:05,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 10:13:05,577 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1923986815, now seen corresponding path program 1 times [2022-01-10 10:13:05,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:05,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971961904] [2022-01-10 10:13:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:05,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 10:13:05,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:05,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971961904] [2022-01-10 10:13:05,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971961904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:05,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:05,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:13:05,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315206747] [2022-01-10 10:13:05,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:05,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:05,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:05,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:05,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:05,726 INFO L87 Difference]: Start difference. First operand 1672 states and 2358 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:06,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:06,727 INFO L93 Difference]: Finished difference Result 4174 states and 5865 transitions. [2022-01-10 10:13:06,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:06,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 176 [2022-01-10 10:13:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:06,736 INFO L225 Difference]: With dead ends: 4174 [2022-01-10 10:13:06,736 INFO L226 Difference]: Without dead ends: 2504 [2022-01-10 10:13:06,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:06,739 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 227 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:06,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 68 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:13:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-01-10 10:13:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2503. [2022-01-10 10:13:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 1.3920863309352518) internal successors, (3483), 2502 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3483 transitions. [2022-01-10 10:13:06,780 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3483 transitions. Word has length 176 [2022-01-10 10:13:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:06,781 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 3483 transitions. [2022-01-10 10:13:06,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3483 transitions. [2022-01-10 10:13:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-10 10:13:06,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:06,785 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2022-01-10 10:13:06,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 10:13:06,786 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:06,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1773107095, now seen corresponding path program 1 times [2022-01-10 10:13:06,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:06,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700611672] [2022-01-10 10:13:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:06,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:13:06,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:06,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700611672] [2022-01-10 10:13:06,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700611672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:06,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:06,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:06,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276466807] [2022-01-10 10:13:06,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:06,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:06,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:06,937 INFO L87 Difference]: Start difference. First operand 2503 states and 3483 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:07,335 INFO L93 Difference]: Finished difference Result 7478 states and 10407 transitions. [2022-01-10 10:13:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:07,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 181 [2022-01-10 10:13:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:07,351 INFO L225 Difference]: With dead ends: 7478 [2022-01-10 10:13:07,351 INFO L226 Difference]: Without dead ends: 4977 [2022-01-10 10:13:07,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:07,357 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 325 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:07,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 494 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 10:13:07,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2022-01-10 10:13:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4975. [2022-01-10 10:13:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4974 states have (on average 1.3886208283071975) internal successors, (6907), 4974 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 6907 transitions. [2022-01-10 10:13:07,449 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 6907 transitions. Word has length 181 [2022-01-10 10:13:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:07,449 INFO L470 AbstractCegarLoop]: Abstraction has 4975 states and 6907 transitions. [2022-01-10 10:13:07,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 6907 transitions. [2022-01-10 10:13:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-10 10:13:07,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:07,454 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] [2022-01-10 10:13:07,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 10:13:07,455 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash 633042411, now seen corresponding path program 1 times [2022-01-10 10:13:07,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:07,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073174579] [2022-01-10 10:13:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:07,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:13:07,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073174579] [2022-01-10 10:13:07,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073174579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:07,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:07,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:07,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370954961] [2022-01-10 10:13:07,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:07,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:07,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:07,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:07,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:07,595 INFO L87 Difference]: Start difference. First operand 4975 states and 6907 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:08,613 INFO L93 Difference]: Finished difference Result 9930 states and 13780 transitions. [2022-01-10 10:13:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 183 [2022-01-10 10:13:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:08,630 INFO L225 Difference]: With dead ends: 9930 [2022-01-10 10:13:08,630 INFO L226 Difference]: Without dead ends: 4957 [2022-01-10 10:13:08,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:08,636 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 251 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:08,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 341 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:13:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2022-01-10 10:13:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4955. [2022-01-10 10:13:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 1.28118691966088) internal successors, (6347), 4954 states have internal predecessors, (6347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 6347 transitions. [2022-01-10 10:13:08,722 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 6347 transitions. Word has length 183 [2022-01-10 10:13:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:08,722 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 6347 transitions. [2022-01-10 10:13:08,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 6347 transitions. [2022-01-10 10:13:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 10:13:08,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:08,729 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] [2022-01-10 10:13:08,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 10:13:08,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:08,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1111190039, now seen corresponding path program 1 times [2022-01-10 10:13:08,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:08,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874070877] [2022-01-10 10:13:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:08,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:13:08,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874070877] [2022-01-10 10:13:08,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874070877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:08,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:08,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:08,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036308120] [2022-01-10 10:13:08,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:08,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:08,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:08,852 INFO L87 Difference]: Start difference. First operand 4955 states and 6347 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 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) [2022-01-10 10:13:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:09,871 INFO L93 Difference]: Finished difference Result 14784 states and 18937 transitions. [2022-01-10 10:13:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 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 185 [2022-01-10 10:13:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:09,900 INFO L225 Difference]: With dead ends: 14784 [2022-01-10 10:13:09,900 INFO L226 Difference]: Without dead ends: 9831 [2022-01-10 10:13:09,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:09,909 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 210 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:09,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 377 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:13:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9831 states. [2022-01-10 10:13:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9831 to 9827. [2022-01-10 10:13:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9827 states, 9826 states have (on average 1.1804396499084062) internal successors, (11599), 9826 states have internal predecessors, (11599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9827 states to 9827 states and 11599 transitions. [2022-01-10 10:13:10,145 INFO L78 Accepts]: Start accepts. Automaton has 9827 states and 11599 transitions. Word has length 185 [2022-01-10 10:13:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:10,147 INFO L470 AbstractCegarLoop]: Abstraction has 9827 states and 11599 transitions. [2022-01-10 10:13:10,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 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) [2022-01-10 10:13:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 9827 states and 11599 transitions. [2022-01-10 10:13:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 10:13:10,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:10,159 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:13:10,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 10:13:10,160 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:10,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:10,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1191526111, now seen corresponding path program 1 times [2022-01-10 10:13:10,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:10,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868157642] [2022-01-10 10:13:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:10,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 10:13:10,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:10,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868157642] [2022-01-10 10:13:10,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868157642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:10,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:10,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:13:10,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749846607] [2022-01-10 10:13:10,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:10,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:10,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:10,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:10,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:10,304 INFO L87 Difference]: Start difference. First operand 9827 states and 11599 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:11,301 INFO L93 Difference]: Finished difference Result 24528 states and 29441 transitions. [2022-01-10 10:13:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:11,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-01-10 10:13:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:11,332 INFO L225 Difference]: With dead ends: 24528 [2022-01-10 10:13:11,332 INFO L226 Difference]: Without dead ends: 14703 [2022-01-10 10:13:11,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:11,348 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 209 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:11,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 135 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:13:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14703 states. [2022-01-10 10:13:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14703 to 14699. [2022-01-10 10:13:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14699 states, 14698 states have (on average 1.1555994012790856) internal successors, (16985), 14698 states have internal predecessors, (16985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14699 states to 14699 states and 16985 transitions. [2022-01-10 10:13:11,596 INFO L78 Accepts]: Start accepts. Automaton has 14699 states and 16985 transitions. Word has length 195 [2022-01-10 10:13:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:11,596 INFO L470 AbstractCegarLoop]: Abstraction has 14699 states and 16985 transitions. [2022-01-10 10:13:11,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 14699 states and 16985 transitions. [2022-01-10 10:13:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-10 10:13:11,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:11,608 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] [2022-01-10 10:13:11,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 10:13:11,608 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1946013882, now seen corresponding path program 1 times [2022-01-10 10:13:11,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:11,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568966404] [2022-01-10 10:13:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:11,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 10:13:11,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568966404] [2022-01-10 10:13:11,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568966404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:11,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:11,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:11,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300100317] [2022-01-10 10:13:11,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:11,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:13:11,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:13:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:13:11,799 INFO L87 Difference]: Start difference. First operand 14699 states and 16985 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:13,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:13,164 INFO L93 Difference]: Finished difference Result 53456 states and 62177 transitions. [2022-01-10 10:13:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:13:13,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 228 [2022-01-10 10:13:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:13,234 INFO L225 Difference]: With dead ends: 53456 [2022-01-10 10:13:13,234 INFO L226 Difference]: Without dead ends: 38759 [2022-01-10 10:13:13,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:13:13,260 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 505 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:13,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 291 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 10:13:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38759 states. [2022-01-10 10:13:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38759 to 38752. [2022-01-10 10:13:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38752 states, 38751 states have (on average 1.163969962065495) internal successors, (45105), 38751 states have internal predecessors, (45105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38752 states to 38752 states and 45105 transitions. [2022-01-10 10:13:13,886 INFO L78 Accepts]: Start accepts. Automaton has 38752 states and 45105 transitions. Word has length 228 [2022-01-10 10:13:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:13,886 INFO L470 AbstractCegarLoop]: Abstraction has 38752 states and 45105 transitions. [2022-01-10 10:13:13,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 38752 states and 45105 transitions. [2022-01-10 10:13:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-10 10:13:13,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:13,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:13:13,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 10:13:13,913 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:13,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2007696375, now seen corresponding path program 1 times [2022-01-10 10:13:13,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:13,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367093405] [2022-01-10 10:13:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:13,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:13:14,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367093405] [2022-01-10 10:13:14,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367093405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:14,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:14,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:14,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175809491] [2022-01-10 10:13:14,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:14,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:14,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:14,114 INFO L87 Difference]: Start difference. First operand 38752 states and 45105 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:15,453 INFO L93 Difference]: Finished difference Result 105772 states and 123530 transitions. [2022-01-10 10:13:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:15,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 231 [2022-01-10 10:13:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:15,569 INFO L225 Difference]: With dead ends: 105772 [2022-01-10 10:13:15,570 INFO L226 Difference]: Without dead ends: 67022 [2022-01-10 10:13:15,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:15,621 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 221 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:15,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 345 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:13:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67022 states. [2022-01-10 10:13:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67022 to 66969. [2022-01-10 10:13:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66969 states, 66968 states have (on average 1.1557460279536496) internal successors, (77398), 66968 states have internal predecessors, (77398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66969 states to 66969 states and 77398 transitions. [2022-01-10 10:13:16,983 INFO L78 Accepts]: Start accepts. Automaton has 66969 states and 77398 transitions. Word has length 231 [2022-01-10 10:13:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:16,984 INFO L470 AbstractCegarLoop]: Abstraction has 66969 states and 77398 transitions. [2022-01-10 10:13:16,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 66969 states and 77398 transitions. [2022-01-10 10:13:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-10 10:13:17,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:17,006 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:13:17,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 10:13:17,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1712206401, now seen corresponding path program 1 times [2022-01-10 10:13:17,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:17,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260742360] [2022-01-10 10:13:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:17,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 83 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 10:13:17,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:17,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260742360] [2022-01-10 10:13:17,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260742360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 10:13:17,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697933249] [2022-01-10 10:13:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:17,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 10:13:17,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:13:17,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 10:13:17,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 10:13:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:17,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 7121 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 10:13:18,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 10:13:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 10:13:18,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 10:13:18,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697933249] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:18,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 10:13:18,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 10:13:18,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704238498] [2022-01-10 10:13:18,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:18,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:18,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 10:13:18,487 INFO L87 Difference]: Start difference. First operand 66969 states and 77398 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:19,717 INFO L93 Difference]: Finished difference Result 133989 states and 154889 transitions. [2022-01-10 10:13:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-01-10 10:13:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:19,937 INFO L225 Difference]: With dead ends: 133989 [2022-01-10 10:13:19,937 INFO L226 Difference]: Without dead ends: 67022 [2022-01-10 10:13:19,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 10:13:19,989 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 69 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:19,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 165 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:13:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67022 states. [2022-01-10 10:13:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67022 to 66969. [2022-01-10 10:13:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66969 states, 66968 states have (on average 1.1509078963086847) internal successors, (77074), 66968 states have internal predecessors, (77074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66969 states to 66969 states and 77074 transitions. [2022-01-10 10:13:20,852 INFO L78 Accepts]: Start accepts. Automaton has 66969 states and 77074 transitions. Word has length 239 [2022-01-10 10:13:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:20,853 INFO L470 AbstractCegarLoop]: Abstraction has 66969 states and 77074 transitions. [2022-01-10 10:13:20,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 66969 states and 77074 transitions. [2022-01-10 10:13:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-10 10:13:20,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:20,902 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 10:13:20,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 10:13:21,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-10 10:13:21,128 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:21,129 INFO L85 PathProgramCache]: Analyzing trace with hash -134860443, now seen corresponding path program 1 times [2022-01-10 10:13:21,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:21,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344784359] [2022-01-10 10:13:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:21,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:13:21,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:21,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344784359] [2022-01-10 10:13:21,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344784359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:21,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:21,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:13:21,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177614343] [2022-01-10 10:13:21,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:21,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:21,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:21,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:21,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:21,626 INFO L87 Difference]: Start difference. First operand 66969 states and 77074 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:22,970 INFO L93 Difference]: Finished difference Result 152668 states and 175337 transitions. [2022-01-10 10:13:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:22,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 298 [2022-01-10 10:13:22,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:23,076 INFO L225 Difference]: With dead ends: 152668 [2022-01-10 10:13:23,076 INFO L226 Difference]: Without dead ends: 85701 [2022-01-10 10:13:23,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:23,116 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 161 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:23,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 124 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:13:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85701 states. [2022-01-10 10:13:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85701 to 82441. [2022-01-10 10:13:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82441 states, 82440 states have (on average 1.141060164968462) internal successors, (94069), 82440 states have internal predecessors, (94069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82441 states to 82441 states and 94069 transitions. [2022-01-10 10:13:24,311 INFO L78 Accepts]: Start accepts. Automaton has 82441 states and 94069 transitions. Word has length 298 [2022-01-10 10:13:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:24,311 INFO L470 AbstractCegarLoop]: Abstraction has 82441 states and 94069 transitions. [2022-01-10 10:13:24,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 82441 states and 94069 transitions. [2022-01-10 10:13:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-10 10:13:24,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:24,346 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 10:13:24,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 10:13:24,346 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1849329203, now seen corresponding path program 1 times [2022-01-10 10:13:24,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:24,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227767736] [2022-01-10 10:13:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:24,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 138 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:13:24,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:24,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227767736] [2022-01-10 10:13:24,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227767736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 10:13:24,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470610227] [2022-01-10 10:13:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:24,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 10:13:24,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:13:24,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 10:13:24,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 10:13:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:25,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 9168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 10:13:25,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 10:13:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:13:26,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 10:13:26,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470610227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:26,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 10:13:26,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 10:13:26,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833327975] [2022-01-10 10:13:26,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:26,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:26,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 10:13:26,429 INFO L87 Difference]: Start difference. First operand 82441 states and 94069 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:27,757 INFO L93 Difference]: Finished difference Result 169963 states and 194031 transitions. [2022-01-10 10:13:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:27,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2022-01-10 10:13:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:27,865 INFO L225 Difference]: With dead ends: 169963 [2022-01-10 10:13:27,865 INFO L226 Difference]: Without dead ends: 87524 [2022-01-10 10:13:27,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 10:13:27,913 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 147 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:27,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 144 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:13:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87524 states. [2022-01-10 10:13:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87524 to 86704. [2022-01-10 10:13:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86704 states, 86703 states have (on average 1.1395914789568988) internal successors, (98806), 86703 states have internal predecessors, (98806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86704 states to 86704 states and 98806 transitions. [2022-01-10 10:13:29,141 INFO L78 Accepts]: Start accepts. Automaton has 86704 states and 98806 transitions. Word has length 305 [2022-01-10 10:13:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:29,141 INFO L470 AbstractCegarLoop]: Abstraction has 86704 states and 98806 transitions. [2022-01-10 10:13:29,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 86704 states and 98806 transitions. [2022-01-10 10:13:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-10 10:13:29,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:29,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:13:29,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 10:13:29,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-10 10:13:29,395 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:29,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1897790242, now seen corresponding path program 1 times [2022-01-10 10:13:29,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:29,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882714910] [2022-01-10 10:13:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:29,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 10:13:29,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:29,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882714910] [2022-01-10 10:13:29,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882714910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:29,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:29,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:29,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380928018] [2022-01-10 10:13:29,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:29,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:29,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:29,651 INFO L87 Difference]: Start difference. First operand 86704 states and 98806 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:31,273 INFO L93 Difference]: Finished difference Result 158783 states and 180892 transitions. [2022-01-10 10:13:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:31,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2022-01-10 10:13:31,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:31,368 INFO L225 Difference]: With dead ends: 158783 [2022-01-10 10:13:31,368 INFO L226 Difference]: Without dead ends: 72284 [2022-01-10 10:13:31,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:31,411 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 229 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:31,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 336 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 10:13:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72284 states. [2022-01-10 10:13:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72284 to 72263. [2022-01-10 10:13:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72263 states, 72262 states have (on average 1.1254601311892833) internal successors, (81328), 72262 states have internal predecessors, (81328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72263 states to 72263 states and 81328 transitions. [2022-01-10 10:13:32,363 INFO L78 Accepts]: Start accepts. Automaton has 72263 states and 81328 transitions. Word has length 310 [2022-01-10 10:13:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:32,363 INFO L470 AbstractCegarLoop]: Abstraction has 72263 states and 81328 transitions. [2022-01-10 10:13:32,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 72263 states and 81328 transitions. [2022-01-10 10:13:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-10 10:13:32,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:32,405 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 10:13:32,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 10:13:32,405 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:32,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:32,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1268735071, now seen corresponding path program 1 times [2022-01-10 10:13:32,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:32,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450582968] [2022-01-10 10:13:32,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:32,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 10:13:32,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:32,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450582968] [2022-01-10 10:13:32,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450582968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:32,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:32,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:32,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281307835] [2022-01-10 10:13:32,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:32,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:32,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:32,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:32,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:32,971 INFO L87 Difference]: Start difference. First operand 72263 states and 81328 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:34,303 INFO L93 Difference]: Finished difference Result 147625 states and 166006 transitions. [2022-01-10 10:13:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:34,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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 342 [2022-01-10 10:13:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:34,390 INFO L225 Difference]: With dead ends: 147625 [2022-01-10 10:13:34,391 INFO L226 Difference]: Without dead ends: 75567 [2022-01-10 10:13:34,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:34,425 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 87 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:34,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 349 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:13:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75567 states. [2022-01-10 10:13:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75567 to 74496. [2022-01-10 10:13:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74496 states, 74495 states have (on average 1.1144372105510436) internal successors, (83020), 74495 states have internal predecessors, (83020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74496 states to 74496 states and 83020 transitions. [2022-01-10 10:13:35,428 INFO L78 Accepts]: Start accepts. Automaton has 74496 states and 83020 transitions. Word has length 342 [2022-01-10 10:13:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:35,429 INFO L470 AbstractCegarLoop]: Abstraction has 74496 states and 83020 transitions. [2022-01-10 10:13:35,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:35,429 INFO L276 IsEmpty]: Start isEmpty. Operand 74496 states and 83020 transitions. [2022-01-10 10:13:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-01-10 10:13:35,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:35,467 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:13:35,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 10:13:35,467 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:35,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1527691875, now seen corresponding path program 1 times [2022-01-10 10:13:35,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:35,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274582065] [2022-01-10 10:13:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:35,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 10:13:35,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:35,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274582065] [2022-01-10 10:13:35,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274582065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:35,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:35,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:35,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326921347] [2022-01-10 10:13:35,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:35,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:13:35,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:13:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:13:35,826 INFO L87 Difference]: Start difference. First operand 74496 states and 83020 transitions. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:37,738 INFO L93 Difference]: Finished difference Result 149662 states and 166786 transitions. [2022-01-10 10:13:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:13:37,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 3 states have internal predecessors, (329), 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 358 [2022-01-10 10:13:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:37,831 INFO L225 Difference]: With dead ends: 149662 [2022-01-10 10:13:37,831 INFO L226 Difference]: Without dead ends: 75371 [2022-01-10 10:13:37,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:13:37,865 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 299 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:37,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 105 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 10:13:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75371 states. [2022-01-10 10:13:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75371 to 73481. [2022-01-10 10:13:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73481 states, 73480 states have (on average 1.1145617855198693) internal successors, (81898), 73480 states have internal predecessors, (81898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73481 states to 73481 states and 81898 transitions. [2022-01-10 10:13:38,641 INFO L78 Accepts]: Start accepts. Automaton has 73481 states and 81898 transitions. Word has length 358 [2022-01-10 10:13:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:38,642 INFO L470 AbstractCegarLoop]: Abstraction has 73481 states and 81898 transitions. [2022-01-10 10:13:38,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 73481 states and 81898 transitions. [2022-01-10 10:13:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-01-10 10:13:38,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:38,902 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 10:13:38,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 10:13:38,902 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash -557901100, now seen corresponding path program 1 times [2022-01-10 10:13:38,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:38,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544267969] [2022-01-10 10:13:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:38,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-10 10:13:39,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544267969] [2022-01-10 10:13:39,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544267969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:39,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:39,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:39,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696106669] [2022-01-10 10:13:39,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:39,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:13:39,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:39,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:13:39,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:39,154 INFO L87 Difference]: Start difference. First operand 73481 states and 81898 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:40,008 INFO L93 Difference]: Finished difference Result 199638 states and 222732 transitions. [2022-01-10 10:13:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:13:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 364 [2022-01-10 10:13:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:40,161 INFO L225 Difference]: With dead ends: 199638 [2022-01-10 10:13:40,161 INFO L226 Difference]: Without dead ends: 126362 [2022-01-10 10:13:40,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:13:40,200 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 298 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:40,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 872 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 10:13:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126362 states. [2022-01-10 10:13:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126362 to 125952. [2022-01-10 10:13:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125952 states, 125951 states have (on average 1.106072996641551) internal successors, (139311), 125951 states have internal predecessors, (139311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125952 states to 125952 states and 139311 transitions. [2022-01-10 10:13:41,829 INFO L78 Accepts]: Start accepts. Automaton has 125952 states and 139311 transitions. Word has length 364 [2022-01-10 10:13:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:41,829 INFO L470 AbstractCegarLoop]: Abstraction has 125952 states and 139311 transitions. [2022-01-10 10:13:41,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 125952 states and 139311 transitions. [2022-01-10 10:13:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-01-10 10:13:41,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:41,885 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:13:41,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 10:13:41,886 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1529725445, now seen corresponding path program 1 times [2022-01-10 10:13:41,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:41,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029732922] [2022-01-10 10:13:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:41,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:13:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:13:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-01-10 10:13:42,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:13:42,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029732922] [2022-01-10 10:13:42,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029732922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:13:42,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:13:42,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:13:42,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030008833] [2022-01-10 10:13:42,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:13:42,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:13:42,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:13:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:13:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:13:42,083 INFO L87 Difference]: Start difference. First operand 125952 states and 139311 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) [2022-01-10 10:13:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:13:44,343 INFO L93 Difference]: Finished difference Result 343933 states and 381715 transitions. [2022-01-10 10:13:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:13:44,344 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 365 [2022-01-10 10:13:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:13:44,923 INFO L225 Difference]: With dead ends: 343933 [2022-01-10 10:13:44,924 INFO L226 Difference]: Without dead ends: 218186 [2022-01-10 10:13:44,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:13:44,956 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 483 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:13:44,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 469 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 10:13:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218186 states. [2022-01-10 10:13:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218186 to 204742. [2022-01-10 10:13:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204742 states, 204741 states have (on average 1.1124103135180545) internal successors, (227756), 204741 states have internal predecessors, (227756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:13:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204742 states to 204742 states and 227756 transitions. [2022-01-10 10:13:47,711 INFO L78 Accepts]: Start accepts. Automaton has 204742 states and 227756 transitions. Word has length 365 [2022-01-10 10:13:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:13:47,712 INFO L470 AbstractCegarLoop]: Abstraction has 204742 states and 227756 transitions. [2022-01-10 10:13:47,712 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) [2022-01-10 10:13:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 204742 states and 227756 transitions. [2022-01-10 10:13:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-01-10 10:13:47,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:13:47,780 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:13:47,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 10:13:47,781 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:13:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:13:47,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2069085658, now seen corresponding path program 1 times [2022-01-10 10:13:47,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:13:47,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917416998] [2022-01-10 10:13:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:13:47,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms