/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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 10:10:32,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 10:10:32,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 10:10:32,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 10:10:32,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 10:10:32,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 10:10:32,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 10:10:32,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 10:10:32,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 10:10:32,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 10:10:32,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 10:10:32,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 10:10:32,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 10:10:32,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 10:10:32,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 10:10:32,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 10:10:32,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 10:10:32,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 10:10:32,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 10:10:32,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 10:10:32,299 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 10:10:32,312 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 10:10:32,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 10:10:32,313 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 10:10:32,313 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 10:10:32,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 10:10:32,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 10:10:32,314 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 10:10:32,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 10:10:32,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 10:10:32,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 10:10:32,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 10:10:32,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 10:10:32,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 10:10:32,315 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 10:10:32,315 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 10:10:32,315 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 10:10:32,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 10:10:32,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 10:10:32,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 10:10:32,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 10:10:32,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 10:10:32,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:10:32,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 10:10:32,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 10:10:32,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 10:10:32,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 10:10:32,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 10:10:32,316 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 10:10:32,316 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 10:10:32,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 10:10:32,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 10:10:32,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 10:10:32,317 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 10:10:32,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 10:10:32,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 10:10:32,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 10:10:32,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 10:10:32,499 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 10:10:32,500 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 10:10:32,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label17.c [2022-01-10 10:10:32,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af008b82f/8a97ff95ba154aad84ae0b2ec679ae6e/FLAG3750ffcf1 [2022-01-10 10:10:32,989 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 10:10:32,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label17.c [2022-01-10 10:10:33,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af008b82f/8a97ff95ba154aad84ae0b2ec679ae6e/FLAG3750ffcf1 [2022-01-10 10:10:33,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af008b82f/8a97ff95ba154aad84ae0b2ec679ae6e [2022-01-10 10:10:33,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 10:10:33,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 10:10:33,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 10:10:33,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 10:10:33,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 10:10:33,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:33,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78376bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33, skipping insertion in model container [2022-01-10 10:10:33,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:33,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 10:10:33,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 10:10:33,720 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_label17.c[61094,61107] [2022-01-10 10:10:33,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:10:33,754 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 10:10:33,879 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_label17.c[61094,61107] [2022-01-10 10:10:33,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:10:33,908 INFO L208 MainTranslator]: Completed translation [2022-01-10 10:10:33,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33 WrapperNode [2022-01-10 10:10:33,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 10:10:33,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 10:10:33,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 10:10:33,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 10:10:33,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:33,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:34,004 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 10:10:34,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 10:10:34,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 10:10:34,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 10:10:34,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 10:10:34,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:34,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:34,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:34,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:34,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:34,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:34,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:34,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 10:10:34,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 10:10:34,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 10:10:34,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 10:10:34,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (1/1) ... [2022-01-10 10:10:34,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:10:34,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:10:34,108 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 10:10:34,123 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 10:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 10:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 10:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 10:10:34,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 10:10:34,197 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 10:10:34,198 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 10:10:35,556 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 10:10:35,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 10:10:35,563 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 10:10:35,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:10:35 BoogieIcfgContainer [2022-01-10 10:10:35,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 10:10:35,565 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 10:10:35,565 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 10:10:35,566 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 10:10:35,568 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:10:35" (1/1) ... [2022-01-10 10:10:35,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:10:35 BasicIcfg [2022-01-10 10:10:35,868 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 10:10:35,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 10:10:35,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 10:10:35,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 10:10:35,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 10:10:33" (1/4) ... [2022-01-10 10:10:35,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71829394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:10:35, skipping insertion in model container [2022-01-10 10:10:35,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:33" (2/4) ... [2022-01-10 10:10:35,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71829394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:10:35, skipping insertion in model container [2022-01-10 10:10:35,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:10:35" (3/4) ... [2022-01-10 10:10:35,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71829394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 10:10:35, skipping insertion in model container [2022-01-10 10:10:35,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:10:35" (4/4) ... [2022-01-10 10:10:35,874 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label17.cTransformedIcfg [2022-01-10 10:10:35,878 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 10:10:35,878 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 10:10:35,917 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 10:10:35,922 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 10:10:35,922 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 10:10:35,939 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 10:10:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-10 10:10:35,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:35,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:35,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash -614292288, now seen corresponding path program 1 times [2022-01-10 10:10:35,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:35,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62334037] [2022-01-10 10:10:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:35,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:36,566 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 10:10:36,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:36,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62334037] [2022-01-10 10:10:36,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62334037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:36,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:36,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:36,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516357472] [2022-01-10 10:10:36,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:36,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:36,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:36,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:36,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:36,591 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 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:37,720 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2022-01-10 10:10:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:37,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-01-10 10:10:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:37,736 INFO L225 Difference]: With dead ends: 857 [2022-01-10 10:10:37,736 INFO L226 Difference]: Without dead ends: 462 [2022-01-10 10:10:37,739 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 10:10:37,741 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 89 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:37,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 186 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 10:10:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-10 10:10:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-01-10 10:10:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2022-01-10 10:10:37,781 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 199 [2022-01-10 10:10:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:37,781 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2022-01-10 10:10:37,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:37,782 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2022-01-10 10:10:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-10 10:10:37,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:37,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:37,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 10:10:37,785 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash 428741980, now seen corresponding path program 1 times [2022-01-10 10:10:37,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:37,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975542886] [2022-01-10 10:10:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:37,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:37,882 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 10:10:37,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:37,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975542886] [2022-01-10 10:10:37,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975542886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:37,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:37,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:37,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466093118] [2022-01-10 10:10:37,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:37,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:37,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:37,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:37,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:37,884 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 10:10:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:38,782 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2022-01-10 10:10:38,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2022-01-10 10:10:38,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:38,790 INFO L225 Difference]: With dead ends: 1344 [2022-01-10 10:10:38,790 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 10:10:38,791 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 10:10:38,792 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:38,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 94 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:10:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 10:10:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2022-01-10 10:10:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 0 states have call successors, (0), 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 10:10:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2022-01-10 10:10:38,840 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 207 [2022-01-10 10:10:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:38,840 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2022-01-10 10:10:38,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 10:10:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2022-01-10 10:10:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-10 10:10:38,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:38,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:38,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 10:10:38,853 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:38,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:38,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1937739170, now seen corresponding path program 1 times [2022-01-10 10:10:38,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:38,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107338307] [2022-01-10 10:10:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:38,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:38,969 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 10:10:38,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:38,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107338307] [2022-01-10 10:10:38,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107338307] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:38,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:38,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:38,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077193728] [2022-01-10 10:10:38,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:38,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:38,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:38,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:38,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:38,972 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 10:10:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:39,315 INFO L93 Difference]: Finished difference Result 2589 states and 3916 transitions. [2022-01-10 10:10:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 219 [2022-01-10 10:10:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:39,320 INFO L225 Difference]: With dead ends: 2589 [2022-01-10 10:10:39,321 INFO L226 Difference]: Without dead ends: 1721 [2022-01-10 10:10:39,324 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 10:10:39,326 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:39,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 10:10:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-01-10 10:10:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2022-01-10 10:10:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5110593713620488) internal successors, (2596), 1718 states have internal predecessors, (2596), 0 states have call successors, (0), 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 10:10:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2596 transitions. [2022-01-10 10:10:39,357 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2596 transitions. Word has length 219 [2022-01-10 10:10:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:39,357 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2596 transitions. [2022-01-10 10:10:39,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 10:10:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2596 transitions. [2022-01-10 10:10:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-10 10:10:39,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:39,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:39,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 10:10:39,361 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:39,362 INFO L85 PathProgramCache]: Analyzing trace with hash 449726884, now seen corresponding path program 1 times [2022-01-10 10:10:39,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:39,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953328187] [2022-01-10 10:10:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:39,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:39,499 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 10:10:39,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953328187] [2022-01-10 10:10:39,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953328187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:39,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:39,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:39,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609058232] [2022-01-10 10:10:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:39,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:39,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:39,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:39,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:39,502 INFO L87 Difference]: Start difference. First operand 1719 states and 2596 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:40,372 INFO L93 Difference]: Finished difference Result 5073 states and 7676 transitions. [2022-01-10 10:10:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2022-01-10 10:10:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:40,381 INFO L225 Difference]: With dead ends: 5073 [2022-01-10 10:10:40,381 INFO L226 Difference]: Without dead ends: 3356 [2022-01-10 10:10:40,383 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 10:10:40,383 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 259 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:40,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 401 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:10:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2022-01-10 10:10:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 3354. [2022-01-10 10:10:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 1.4085893229943334) internal successors, (4723), 3353 states have internal predecessors, (4723), 0 states have call successors, (0), 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 10:10:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 4723 transitions. [2022-01-10 10:10:40,432 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 4723 transitions. Word has length 221 [2022-01-10 10:10:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:40,432 INFO L470 AbstractCegarLoop]: Abstraction has 3354 states and 4723 transitions. [2022-01-10 10:10:40,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 4723 transitions. [2022-01-10 10:10:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-10 10:10:40,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:40,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:40,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 10:10:40,438 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash -399655537, now seen corresponding path program 1 times [2022-01-10 10:10:40,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:40,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374794130] [2022-01-10 10:10:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:40,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:40,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:40,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374794130] [2022-01-10 10:10:40,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374794130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:40,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:40,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:40,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417527097] [2022-01-10 10:10:40,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:40,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:40,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:40,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:40,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:40,557 INFO L87 Difference]: Start difference. First operand 3354 states and 4723 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 10:10:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:41,356 INFO L93 Difference]: Finished difference Result 6708 states and 9448 transitions. [2022-01-10 10:10:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:41,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2022-01-10 10:10:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:41,365 INFO L225 Difference]: With dead ends: 6708 [2022-01-10 10:10:41,365 INFO L226 Difference]: Without dead ends: 3356 [2022-01-10 10:10:41,368 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 10:10:41,369 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 238 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:41,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 141 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:10:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2022-01-10 10:10:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 3354. [2022-01-10 10:10:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 1.329555621831196) internal successors, (4458), 3353 states have internal predecessors, (4458), 0 states have call successors, (0), 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 10:10:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 4458 transitions. [2022-01-10 10:10:41,414 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 4458 transitions. Word has length 225 [2022-01-10 10:10:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:41,415 INFO L470 AbstractCegarLoop]: Abstraction has 3354 states and 4458 transitions. [2022-01-10 10:10:41,418 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 10:10:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 4458 transitions. [2022-01-10 10:10:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-10 10:10:41,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:41,425 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:41,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 10:10:41,425 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2070500650, now seen corresponding path program 1 times [2022-01-10 10:10:41,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:41,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669282960] [2022-01-10 10:10:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:41,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 10:10:41,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:41,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669282960] [2022-01-10 10:10:41,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669282960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:41,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:41,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:41,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453258074] [2022-01-10 10:10:41,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:41,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:41,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:41,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:41,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:41,526 INFO L87 Difference]: Start difference. First operand 3354 states and 4458 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:42,453 INFO L93 Difference]: Finished difference Result 8354 states and 11074 transitions. [2022-01-10 10:10:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2022-01-10 10:10:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:42,465 INFO L225 Difference]: With dead ends: 8354 [2022-01-10 10:10:42,466 INFO L226 Difference]: Without dead ends: 5002 [2022-01-10 10:10:42,469 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 10:10:42,469 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 222 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:42,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 413 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:10:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2022-01-10 10:10:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4994. [2022-01-10 10:10:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4994 states, 4993 states have (on average 1.284197877027839) internal successors, (6412), 4993 states have internal predecessors, (6412), 0 states have call successors, (0), 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 10:10:42,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4994 states to 4994 states and 6412 transitions. [2022-01-10 10:10:42,528 INFO L78 Accepts]: Start accepts. Automaton has 4994 states and 6412 transitions. Word has length 227 [2022-01-10 10:10:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:42,528 INFO L470 AbstractCegarLoop]: Abstraction has 4994 states and 6412 transitions. [2022-01-10 10:10:42,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4994 states and 6412 transitions. [2022-01-10 10:10:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-10 10:10:42,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:42,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:42,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 10:10:42,536 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:42,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1116147449, now seen corresponding path program 1 times [2022-01-10 10:10:42,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:42,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394593404] [2022-01-10 10:10:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:42,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 10:10:42,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394593404] [2022-01-10 10:10:42,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394593404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:42,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:42,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:42,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96428334] [2022-01-10 10:10:42,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:42,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:42,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:42,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:42,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:42,646 INFO L87 Difference]: Start difference. First operand 4994 states and 6412 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 10:10:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:43,558 INFO L93 Difference]: Finished difference Result 11654 states and 14909 transitions. [2022-01-10 10:10:43,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:43,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-01-10 10:10:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:43,574 INFO L225 Difference]: With dead ends: 11654 [2022-01-10 10:10:43,574 INFO L226 Difference]: Without dead ends: 6662 [2022-01-10 10:10:43,579 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 10:10:43,581 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 219 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:43,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 137 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:10:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2022-01-10 10:10:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 6658. [2022-01-10 10:10:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6658 states, 6657 states have (on average 1.2745981673426467) internal successors, (8485), 6657 states have internal predecessors, (8485), 0 states have call successors, (0), 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 10:10:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6658 states to 6658 states and 8485 transitions. [2022-01-10 10:10:43,668 INFO L78 Accepts]: Start accepts. Automaton has 6658 states and 8485 transitions. Word has length 234 [2022-01-10 10:10:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:43,668 INFO L470 AbstractCegarLoop]: Abstraction has 6658 states and 8485 transitions. [2022-01-10 10:10:43,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 10:10:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 6658 states and 8485 transitions. [2022-01-10 10:10:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-10 10:10:43,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:43,678 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:43,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 10:10:43,679 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:43,679 INFO L85 PathProgramCache]: Analyzing trace with hash 968849775, now seen corresponding path program 2 times [2022-01-10 10:10:43,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:43,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612165054] [2022-01-10 10:10:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:43,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 10:10:43,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612165054] [2022-01-10 10:10:43,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612165054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:43,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:43,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:43,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996444360] [2022-01-10 10:10:43,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:43,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:43,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:43,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:43,799 INFO L87 Difference]: Start difference. First operand 6658 states and 8485 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 10:10:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:44,841 INFO L93 Difference]: Finished difference Result 15355 states and 19591 transitions. [2022-01-10 10:10:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:44,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 241 [2022-01-10 10:10:44,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:44,860 INFO L225 Difference]: With dead ends: 15355 [2022-01-10 10:10:44,860 INFO L226 Difference]: Without dead ends: 8699 [2022-01-10 10:10:44,866 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 10:10:44,867 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 806 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:44,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 391 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:10:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2022-01-10 10:10:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 8693. [2022-01-10 10:10:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8693 states, 8692 states have (on average 1.2764611136677404) internal successors, (11095), 8692 states have internal predecessors, (11095), 0 states have call successors, (0), 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 10:10:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 11095 transitions. [2022-01-10 10:10:44,981 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 11095 transitions. Word has length 241 [2022-01-10 10:10:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:44,982 INFO L470 AbstractCegarLoop]: Abstraction has 8693 states and 11095 transitions. [2022-01-10 10:10:44,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 10:10:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 11095 transitions. [2022-01-10 10:10:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-10 10:10:44,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:44,993 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:44,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 10:10:44,994 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash -55902036, now seen corresponding path program 1 times [2022-01-10 10:10:44,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:44,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989914659] [2022-01-10 10:10:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:44,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 10:10:45,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989914659] [2022-01-10 10:10:45,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989914659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:45,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:45,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:45,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738619292] [2022-01-10 10:10:45,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:45,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:45,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:45,099 INFO L87 Difference]: Start difference. First operand 8693 states and 11095 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:46,430 INFO L93 Difference]: Finished difference Result 20070 states and 25722 transitions. [2022-01-10 10:10:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:46,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2022-01-10 10:10:46,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:46,445 INFO L225 Difference]: With dead ends: 20070 [2022-01-10 10:10:46,446 INFO L226 Difference]: Without dead ends: 11379 [2022-01-10 10:10:46,454 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 10:10:46,455 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 449 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:46,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 157 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 10:10:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11379 states. [2022-01-10 10:10:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11379 to 8687. [2022-01-10 10:10:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 1.2763067004374855) internal successors, (11086), 8686 states have internal predecessors, (11086), 0 states have call successors, (0), 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 10:10:46,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 11086 transitions. [2022-01-10 10:10:46,558 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 11086 transitions. Word has length 243 [2022-01-10 10:10:46,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:46,559 INFO L470 AbstractCegarLoop]: Abstraction has 8687 states and 11086 transitions. [2022-01-10 10:10:46,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 11086 transitions. [2022-01-10 10:10:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-10 10:10:46,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:46,568 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:46,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 10:10:46,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1041112350, now seen corresponding path program 1 times [2022-01-10 10:10:46,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:46,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297810186] [2022-01-10 10:10:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:46,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 10:10:46,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:46,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297810186] [2022-01-10 10:10:46,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297810186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:46,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:46,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:46,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499146183] [2022-01-10 10:10:46,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:46,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:46,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:46,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:46,711 INFO L87 Difference]: Start difference. First operand 8687 states and 11086 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:47,528 INFO L93 Difference]: Finished difference Result 17372 states and 22170 transitions. [2022-01-10 10:10:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2022-01-10 10:10:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:47,539 INFO L225 Difference]: With dead ends: 17372 [2022-01-10 10:10:47,539 INFO L226 Difference]: Without dead ends: 8687 [2022-01-10 10:10:47,546 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 10:10:47,546 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 251 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:47,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 378 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 10:10:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8687 states. [2022-01-10 10:10:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8687 to 8681. [2022-01-10 10:10:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8681 states, 8680 states have (on average 1.2328341013824884) internal successors, (10701), 8680 states have internal predecessors, (10701), 0 states have call successors, (0), 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 10:10:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8681 states to 8681 states and 10701 transitions. [2022-01-10 10:10:47,622 INFO L78 Accepts]: Start accepts. Automaton has 8681 states and 10701 transitions. Word has length 248 [2022-01-10 10:10:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:47,622 INFO L470 AbstractCegarLoop]: Abstraction has 8681 states and 10701 transitions. [2022-01-10 10:10:47,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8681 states and 10701 transitions. [2022-01-10 10:10:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-10 10:10:47,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:47,631 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:47,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 10:10:47,631 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash -541272583, now seen corresponding path program 1 times [2022-01-10 10:10:47,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:47,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921876182] [2022-01-10 10:10:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:47,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 10:10:47,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:47,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921876182] [2022-01-10 10:10:47,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921876182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:47,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:47,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:47,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260860686] [2022-01-10 10:10:47,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:47,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:47,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:47,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:47,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:47,725 INFO L87 Difference]: Start difference. First operand 8681 states and 10701 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:48,635 INFO L93 Difference]: Finished difference Result 25367 states and 31253 transitions. [2022-01-10 10:10:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:48,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-01-10 10:10:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:48,656 INFO L225 Difference]: With dead ends: 25367 [2022-01-10 10:10:48,656 INFO L226 Difference]: Without dead ends: 16688 [2022-01-10 10:10:48,666 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 10:10:48,667 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 243 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:48,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 425 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:10:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16688 states. [2022-01-10 10:10:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16688 to 16677. [2022-01-10 10:10:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16677 states, 16676 states have (on average 1.2133605181098586) internal successors, (20234), 16676 states have internal predecessors, (20234), 0 states have call successors, (0), 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 10:10:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16677 states to 16677 states and 20234 transitions. [2022-01-10 10:10:48,833 INFO L78 Accepts]: Start accepts. Automaton has 16677 states and 20234 transitions. Word has length 253 [2022-01-10 10:10:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:48,833 INFO L470 AbstractCegarLoop]: Abstraction has 16677 states and 20234 transitions. [2022-01-10 10:10:48,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 16677 states and 20234 transitions. [2022-01-10 10:10:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-10 10:10:48,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:48,847 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:48,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 10:10:48,847 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1059650507, now seen corresponding path program 1 times [2022-01-10 10:10:48,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:48,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833824102] [2022-01-10 10:10:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:48,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 10:10:49,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833824102] [2022-01-10 10:10:49,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833824102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:49,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:49,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:49,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908975679] [2022-01-10 10:10:49,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:49,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:49,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:49,087 INFO L87 Difference]: Start difference. First operand 16677 states and 20234 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:50,278 INFO L93 Difference]: Finished difference Result 57369 states and 69719 transitions. [2022-01-10 10:10:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-01-10 10:10:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:50,335 INFO L225 Difference]: With dead ends: 57369 [2022-01-10 10:10:50,335 INFO L226 Difference]: Without dead ends: 40694 [2022-01-10 10:10:50,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 10:10:50,441 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 508 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:50,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 624 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:10:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40694 states. [2022-01-10 10:10:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40694 to 30219. [2022-01-10 10:10:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30219 states, 30218 states have (on average 1.2143424449003906) internal successors, (36695), 30218 states have internal predecessors, (36695), 0 states have call successors, (0), 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 10:10:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30219 states to 30219 states and 36695 transitions. [2022-01-10 10:10:50,771 INFO L78 Accepts]: Start accepts. Automaton has 30219 states and 36695 transitions. Word has length 255 [2022-01-10 10:10:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:50,771 INFO L470 AbstractCegarLoop]: Abstraction has 30219 states and 36695 transitions. [2022-01-10 10:10:50,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 30219 states and 36695 transitions. [2022-01-10 10:10:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-10 10:10:50,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:50,793 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:50,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 10:10:50,794 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:50,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:50,794 INFO L85 PathProgramCache]: Analyzing trace with hash 319062594, now seen corresponding path program 1 times [2022-01-10 10:10:50,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:50,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006099231] [2022-01-10 10:10:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:50,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 10:10:50,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:50,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006099231] [2022-01-10 10:10:50,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006099231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:50,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:50,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:50,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189011635] [2022-01-10 10:10:50,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:50,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:50,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:50,999 INFO L87 Difference]: Start difference. First operand 30219 states and 36695 transitions. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 10:10:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:52,423 INFO L93 Difference]: Finished difference Result 91428 states and 111235 transitions. [2022-01-10 10:10:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 269 [2022-01-10 10:10:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:52,493 INFO L225 Difference]: With dead ends: 91428 [2022-01-10 10:10:52,493 INFO L226 Difference]: Without dead ends: 61211 [2022-01-10 10:10:52,505 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 10:10:52,507 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 577 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:52,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 547 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 10:10:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61211 states. [2022-01-10 10:10:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61211 to 61094. [2022-01-10 10:10:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61094 states, 61093 states have (on average 1.212561177221613) internal successors, (74079), 61093 states have internal predecessors, (74079), 0 states have call successors, (0), 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 10:10:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61094 states to 61094 states and 74079 transitions. [2022-01-10 10:10:53,267 INFO L78 Accepts]: Start accepts. Automaton has 61094 states and 74079 transitions. Word has length 269 [2022-01-10 10:10:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:53,267 INFO L470 AbstractCegarLoop]: Abstraction has 61094 states and 74079 transitions. [2022-01-10 10:10:53,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 10:10:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 61094 states and 74079 transitions. [2022-01-10 10:10:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-10 10:10:53,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:53,297 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:53,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 10:10:53,298 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1445911502, now seen corresponding path program 1 times [2022-01-10 10:10:53,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:53,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936757179] [2022-01-10 10:10:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:53,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 10:10:53,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:53,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936757179] [2022-01-10 10:10:53,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936757179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:53,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:53,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:53,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790134549] [2022-01-10 10:10:53,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:53,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:53,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:53,521 INFO L87 Difference]: Start difference. First operand 61094 states and 74079 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 2 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 10:10:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:54,778 INFO L93 Difference]: Finished difference Result 160159 states and 194203 transitions. [2022-01-10 10:10:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:54,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 2 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 269 [2022-01-10 10:10:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:54,998 INFO L225 Difference]: With dead ends: 160159 [2022-01-10 10:10:54,998 INFO L226 Difference]: Without dead ends: 99067 [2022-01-10 10:10:55,034 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 10:10:55,035 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 200 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:55,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 173 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:10:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99067 states. [2022-01-10 10:10:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99067 to 99043. [2022-01-10 10:10:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99043 states, 99042 states have (on average 1.1481492700066638) internal successors, (113715), 99042 states have internal predecessors, (113715), 0 states have call successors, (0), 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 10:10:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99043 states to 99043 states and 113715 transitions. [2022-01-10 10:10:56,297 INFO L78 Accepts]: Start accepts. Automaton has 99043 states and 113715 transitions. Word has length 269 [2022-01-10 10:10:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:56,297 INFO L470 AbstractCegarLoop]: Abstraction has 99043 states and 113715 transitions. [2022-01-10 10:10:56,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 2 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 10:10:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 99043 states and 113715 transitions. [2022-01-10 10:10:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-10 10:10:56,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:56,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:56,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 10:10:56,328 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1221295560, now seen corresponding path program 1 times [2022-01-10 10:10:56,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:56,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837151855] [2022-01-10 10:10:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:56,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:56,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837151855] [2022-01-10 10:10:56,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837151855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:56,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:56,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:56,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53970021] [2022-01-10 10:10:56,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:56,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:56,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:56,714 INFO L87 Difference]: Start difference. First operand 99043 states and 113715 transitions. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 10:10:58,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:58,537 INFO L93 Difference]: Finished difference Result 223777 states and 255526 transitions. [2022-01-10 10:10:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 273 [2022-01-10 10:10:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:58,690 INFO L225 Difference]: With dead ends: 223777 [2022-01-10 10:10:58,690 INFO L226 Difference]: Without dead ends: 123696 [2022-01-10 10:10:58,725 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 10:10:58,726 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 140 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:58,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 218 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 10:10:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123696 states. [2022-01-10 10:11:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123696 to 123584. [2022-01-10 10:11:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123584 states, 123583 states have (on average 1.1274932636365844) internal successors, (139339), 123583 states have internal predecessors, (139339), 0 states have call successors, (0), 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 10:11:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123584 states to 123584 states and 139339 transitions. [2022-01-10 10:11:00,435 INFO L78 Accepts]: Start accepts. Automaton has 123584 states and 139339 transitions. Word has length 273 [2022-01-10 10:11:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:00,436 INFO L470 AbstractCegarLoop]: Abstraction has 123584 states and 139339 transitions. [2022-01-10 10:11:00,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 10:11:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 123584 states and 139339 transitions. [2022-01-10 10:11:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-10 10:11:00,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:00,474 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:00,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 10:11:00,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1377382356, now seen corresponding path program 1 times [2022-01-10 10:11:00,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:00,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273680454] [2022-01-10 10:11:00,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:00,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 10:11:00,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273680454] [2022-01-10 10:11:00,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273680454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:00,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:00,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:11:00,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352426026] [2022-01-10 10:11:00,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:00,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:00,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:00,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:00,626 INFO L87 Difference]: Start difference. First operand 123584 states and 139339 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:02,470 INFO L93 Difference]: Finished difference Result 306256 states and 346145 transitions. [2022-01-10 10:11:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:02,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2022-01-10 10:11:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:02,710 INFO L225 Difference]: With dead ends: 306256 [2022-01-10 10:11:02,711 INFO L226 Difference]: Without dead ends: 182674 [2022-01-10 10:11:02,761 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 10:11:02,762 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 168 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:02,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 231 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:11:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182674 states. [2022-01-10 10:11:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182674 to 149779. [2022-01-10 10:11:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149779 states, 149778 states have (on average 1.1300124183792013) internal successors, (169251), 149778 states have internal predecessors, (169251), 0 states have call successors, (0), 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 10:11:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149779 states to 149779 states and 169251 transitions. [2022-01-10 10:11:04,926 INFO L78 Accepts]: Start accepts. Automaton has 149779 states and 169251 transitions. Word has length 306 [2022-01-10 10:11:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:04,927 INFO L470 AbstractCegarLoop]: Abstraction has 149779 states and 169251 transitions. [2022-01-10 10:11:04,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 149779 states and 169251 transitions. [2022-01-10 10:11:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-10 10:11:05,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:05,003 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:05,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 10:11:05,003 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:05,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1628822040, now seen corresponding path program 1 times [2022-01-10 10:11:05,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:05,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792230253] [2022-01-10 10:11:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:05,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-01-10 10:11:05,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:05,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792230253] [2022-01-10 10:11:05,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792230253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:05,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:05,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:05,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893667228] [2022-01-10 10:11:05,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:05,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:05,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:05,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:05,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:05,147 INFO L87 Difference]: Start difference. First operand 149779 states and 169251 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:07,033 INFO L93 Difference]: Finished difference Result 288684 states and 326122 transitions. [2022-01-10 10:11:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 329 [2022-01-10 10:11:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:07,213 INFO L225 Difference]: With dead ends: 288684 [2022-01-10 10:11:07,213 INFO L226 Difference]: Without dead ends: 138907 [2022-01-10 10:11:07,269 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 10:11:07,269 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 496 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:07,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 62 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:11:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138907 states. [2022-01-10 10:11:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138907 to 116161. [2022-01-10 10:11:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116161 states, 116160 states have (on average 1.1079717630853994) internal successors, (128702), 116160 states have internal predecessors, (128702), 0 states have call successors, (0), 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 10:11:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116161 states to 116161 states and 128702 transitions. [2022-01-10 10:11:09,213 INFO L78 Accepts]: Start accepts. Automaton has 116161 states and 128702 transitions. Word has length 329 [2022-01-10 10:11:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:09,213 INFO L470 AbstractCegarLoop]: Abstraction has 116161 states and 128702 transitions. [2022-01-10 10:11:09,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 116161 states and 128702 transitions. [2022-01-10 10:11:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-01-10 10:11:09,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:09,237 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 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] [2022-01-10 10:11:09,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 10:11:09,238 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:09,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:09,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1190128136, now seen corresponding path program 1 times [2022-01-10 10:11:09,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:09,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691136268] [2022-01-10 10:11:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:09,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 10:11:09,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691136268] [2022-01-10 10:11:09,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691136268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:09,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:09,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 10:11:09,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106762568] [2022-01-10 10:11:09,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:09,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:09,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:09,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:09,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:09,442 INFO L87 Difference]: Start difference. First operand 116161 states and 128702 transitions. Second operand has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 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 10:11:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:11,276 INFO L93 Difference]: Finished difference Result 233173 states and 258566 transitions. [2022-01-10 10:11:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:11,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 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 378 [2022-01-10 10:11:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:11,485 INFO L225 Difference]: With dead ends: 233173 [2022-01-10 10:11:11,485 INFO L226 Difference]: Without dead ends: 117014 [2022-01-10 10:11:11,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 10:11:11,538 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 293 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:11,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 343 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 10:11:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117014 states. [2022-01-10 10:11:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117014 to 115146. [2022-01-10 10:11:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115146 states, 115145 states have (on average 1.0966781015241651) internal successors, (126277), 115145 states have internal predecessors, (126277), 0 states have call successors, (0), 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 10:11:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115146 states to 115146 states and 126277 transitions. [2022-01-10 10:11:13,283 INFO L78 Accepts]: Start accepts. Automaton has 115146 states and 126277 transitions. Word has length 378 [2022-01-10 10:11:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:13,284 INFO L470 AbstractCegarLoop]: Abstraction has 115146 states and 126277 transitions. [2022-01-10 10:11:13,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 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 10:11:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 115146 states and 126277 transitions. [2022-01-10 10:11:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-01-10 10:11:13,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:13,309 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:13,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 10:11:13,309 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:13,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1717171426, now seen corresponding path program 1 times [2022-01-10 10:11:13,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:13,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128287896] [2022-01-10 10:11:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:13,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-01-10 10:11:13,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:13,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128287896] [2022-01-10 10:11:13,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128287896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:13,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:13,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:11:13,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651469195] [2022-01-10 10:11:13,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:13,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:13,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:13,485 INFO L87 Difference]: Start difference. First operand 115146 states and 126277 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 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 10:11:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:15,081 INFO L93 Difference]: Finished difference Result 255334 states and 280711 transitions. [2022-01-10 10:11:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:15,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 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 378 [2022-01-10 10:11:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:15,255 INFO L225 Difference]: With dead ends: 255334 [2022-01-10 10:11:15,255 INFO L226 Difference]: Without dead ends: 140190 [2022-01-10 10:11:15,296 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 10:11:15,297 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 201 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:15,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 168 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:11:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140190 states. [2022-01-10 10:11:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140190 to 139316. [2022-01-10 10:11:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139316 states, 139315 states have (on average 1.0960413451530704) internal successors, (152695), 139315 states have internal predecessors, (152695), 0 states have call successors, (0), 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 10:11:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139316 states to 139316 states and 152695 transitions. [2022-01-10 10:11:17,047 INFO L78 Accepts]: Start accepts. Automaton has 139316 states and 152695 transitions. Word has length 378 [2022-01-10 10:11:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:17,047 INFO L470 AbstractCegarLoop]: Abstraction has 139316 states and 152695 transitions. [2022-01-10 10:11:17,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 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 10:11:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 139316 states and 152695 transitions. [2022-01-10 10:11:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-10 10:11:17,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:17,083 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 10:11:17,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 10:11:17,083 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1310926574, now seen corresponding path program 1 times [2022-01-10 10:11:17,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:17,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609120116] [2022-01-10 10:11:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:17,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:11:17,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:17,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609120116] [2022-01-10 10:11:17,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609120116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:17,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:17,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:17,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346726680] [2022-01-10 10:11:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:17,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:17,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:17,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:17,475 INFO L87 Difference]: Start difference. First operand 139316 states and 152695 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 10:11:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:19,027 INFO L93 Difference]: Finished difference Result 290890 states and 319415 transitions. [2022-01-10 10:11:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:19,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 390 [2022-01-10 10:11:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:19,219 INFO L225 Difference]: With dead ends: 290890 [2022-01-10 10:11:19,219 INFO L226 Difference]: Without dead ends: 143344 [2022-01-10 10:11:19,290 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 10:11:19,291 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 167 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:19,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 357 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:11:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143344 states. [2022-01-10 10:11:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143344 to 126803. [2022-01-10 10:11:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126803 states, 126802 states have (on average 1.0680825223576915) internal successors, (135435), 126802 states have internal predecessors, (135435), 0 states have call successors, (0), 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 10:11:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126803 states to 126803 states and 135435 transitions. [2022-01-10 10:11:21,185 INFO L78 Accepts]: Start accepts. Automaton has 126803 states and 135435 transitions. Word has length 390 [2022-01-10 10:11:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:21,185 INFO L470 AbstractCegarLoop]: Abstraction has 126803 states and 135435 transitions. [2022-01-10 10:11:21,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 10:11:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 126803 states and 135435 transitions. [2022-01-10 10:11:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-01-10 10:11:21,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:21,212 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 10:11:21,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 10:11:21,212 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash -747454773, now seen corresponding path program 1 times [2022-01-10 10:11:21,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:21,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357936045] [2022-01-10 10:11:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:21,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 10:11:21,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:21,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357936045] [2022-01-10 10:11:21,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357936045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:21,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:21,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:21,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735892358] [2022-01-10 10:11:21,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:21,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:21,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:21,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:21,641 INFO L87 Difference]: Start difference. First operand 126803 states and 135435 transitions. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 10:11:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:23,257 INFO L93 Difference]: Finished difference Result 255335 states and 272776 transitions. [2022-01-10 10:11:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 407 [2022-01-10 10:11:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:23,410 INFO L225 Difference]: With dead ends: 255335 [2022-01-10 10:11:23,411 INFO L226 Difference]: Without dead ends: 126910 [2022-01-10 10:11:23,471 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 10:11:23,471 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 277 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:23,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 76 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:11:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126910 states. [2022-01-10 10:11:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126910 to 125991. [2022-01-10 10:11:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125991 states, 125990 states have (on average 1.0679022144614652) internal successors, (134545), 125990 states have internal predecessors, (134545), 0 states have call successors, (0), 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 10:11:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125991 states to 125991 states and 134545 transitions. [2022-01-10 10:11:25,149 INFO L78 Accepts]: Start accepts. Automaton has 125991 states and 134545 transitions. Word has length 407 [2022-01-10 10:11:25,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:25,150 INFO L470 AbstractCegarLoop]: Abstraction has 125991 states and 134545 transitions. [2022-01-10 10:11:25,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 10:11:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 125991 states and 134545 transitions. [2022-01-10 10:11:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2022-01-10 10:11:25,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:25,178 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:25,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 10:11:25,178 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:25,179 INFO L85 PathProgramCache]: Analyzing trace with hash -852987941, now seen corresponding path program 1 times [2022-01-10 10:11:25,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:25,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737990823] [2022-01-10 10:11:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:25,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 10:11:25,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:25,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737990823] [2022-01-10 10:11:25,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737990823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:25,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:25,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:25,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424901697] [2022-01-10 10:11:25,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:25,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:25,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:25,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:25,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:25,698 INFO L87 Difference]: Start difference. First operand 125991 states and 134545 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 10:11:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:26,958 INFO L93 Difference]: Finished difference Result 251598 states and 268696 transitions. [2022-01-10 10:11:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 472 [2022-01-10 10:11:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:27,126 INFO L225 Difference]: With dead ends: 251598 [2022-01-10 10:11:27,127 INFO L226 Difference]: Without dead ends: 125609 [2022-01-10 10:11:27,199 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 10:11:27,200 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 129 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:27,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 274 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 10:11:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125609 states. [2022-01-10 10:11:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125609 to 125179. [2022-01-10 10:11:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125179 states, 125178 states have (on average 1.0660898879994887) internal successors, (133451), 125178 states have internal predecessors, (133451), 0 states have call successors, (0), 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 10:11:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125179 states to 125179 states and 133451 transitions. [2022-01-10 10:11:28,874 INFO L78 Accepts]: Start accepts. Automaton has 125179 states and 133451 transitions. Word has length 472 [2022-01-10 10:11:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:28,875 INFO L470 AbstractCegarLoop]: Abstraction has 125179 states and 133451 transitions. [2022-01-10 10:11:28,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 10:11:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 125179 states and 133451 transitions. [2022-01-10 10:11:28,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-01-10 10:11:28,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:28,906 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:28,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-10 10:11:28,906 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:28,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1887320668, now seen corresponding path program 1 times [2022-01-10 10:11:28,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:28,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745437864] [2022-01-10 10:11:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:28,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 455 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-01-10 10:11:29,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:29,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745437864] [2022-01-10 10:11:29,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745437864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:29,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:29,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:29,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203685313] [2022-01-10 10:11:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:29,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:29,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:29,391 INFO L87 Difference]: Start difference. First operand 125179 states and 133451 transitions. Second operand has 4 states, 4 states have (on average 88.0) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 10:11:31,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:31,006 INFO L93 Difference]: Finished difference Result 324582 states and 345997 transitions. [2022-01-10 10:11:31,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:31,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.0) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 487 [2022-01-10 10:11:31,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:31,267 INFO L225 Difference]: With dead ends: 324582 [2022-01-10 10:11:31,267 INFO L226 Difference]: Without dead ends: 198999