/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:51:11,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:51:11,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:51:11,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:51:11,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:51:11,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:51:11,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:51:11,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:51:11,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:51:11,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:51:11,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:51:11,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:51:11,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:51:11,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:51:11,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:51:11,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:51:11,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:51:11,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:51:11,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:51:11,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:51:11,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:51:11,895 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:51:11,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:51:11,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:51:11,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:51:11,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:51:11,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:51:11,897 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:51:11,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:51:11,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:51:11,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:51:11,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:51:11,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:51:11,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:51:11,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:51:11,899 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:51:11,899 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:51:11,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:51:11,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:51:11,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:51:11,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:51:11,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:51:11,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:51:11,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:51:11,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:51:11,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:51:11,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:51:11,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:51:11,900 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:51:11,900 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:51:11,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:51:11,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:51:11,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:51:11,901 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:51:11,901 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:51:12,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:51:12,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:51:12,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:51:12,104 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:51:12,105 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:51:12,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label35.c [2022-01-10 21:51:12,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79057960/3173843fde034e27b3dc52926f9c983e/FLAG0c5b84a89 [2022-01-10 21:51:12,679 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:51:12,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label35.c [2022-01-10 21:51:12,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79057960/3173843fde034e27b3dc52926f9c983e/FLAG0c5b84a89 [2022-01-10 21:51:13,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79057960/3173843fde034e27b3dc52926f9c983e [2022-01-10 21:51:13,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:51:13,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:51:13,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:51:13,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:51:13,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:51:13,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7a661c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13, skipping insertion in model container [2022-01-10 21:51:13,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:51:13,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:51:13,581 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_label35.c[53787,53800] [2022-01-10 21:51:13,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:51:13,621 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:51:13,756 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_label35.c[53787,53800] [2022-01-10 21:51:13,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:51:13,788 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:51:13,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13 WrapperNode [2022-01-10 21:51:13,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:51:13,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:51:13,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:51:13,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:51:13,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,907 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 21:51:13,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:51:13,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:51:13,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:51:13,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:51:13,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:51:13,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:51:13,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:51:13,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:51:13,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (1/1) ... [2022-01-10 21:51:13,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:51:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:51:14,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 21:51:14,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 21:51:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:51:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:51:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:51:14,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:51:14,148 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:51:14,149 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:51:15,742 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:51:15,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:51:15,754 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 21:51:15,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:51:15 BoogieIcfgContainer [2022-01-10 21:51:15,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:51:15,757 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:51:15,757 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:51:15,759 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:51:15,760 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:51:15" (1/1) ... [2022-01-10 21:51:16,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:51:16 BasicIcfg [2022-01-10 21:51:16,134 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:51:16,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:51:16,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:51:16,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:51:16,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:51:13" (1/4) ... [2022-01-10 21:51:16,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221ea145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:51:16, skipping insertion in model container [2022-01-10 21:51:16,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:13" (2/4) ... [2022-01-10 21:51:16,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221ea145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:51:16, skipping insertion in model container [2022-01-10 21:51:16,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:51:15" (3/4) ... [2022-01-10 21:51:16,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221ea145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:51:16, skipping insertion in model container [2022-01-10 21:51:16,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:51:16" (4/4) ... [2022-01-10 21:51:16,140 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label35.cTransformedIcfg [2022-01-10 21:51:16,145 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:51:16,145 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:51:16,187 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:51:16,195 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 21:51:16,196 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:51:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 21:51:16,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:16,229 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] [2022-01-10 21:51:16,229 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:16,233 INFO L85 PathProgramCache]: Analyzing trace with hash 449550831, now seen corresponding path program 1 times [2022-01-10 21:51:16,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:16,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105264677] [2022-01-10 21:51:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:16,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:16,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:16,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105264677] [2022-01-10 21:51:16,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105264677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:16,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:16,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:16,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112223567] [2022-01-10 21:51:16,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:16,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:16,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:16,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:16,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:16,895 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 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:18,035 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2022-01-10 21:51:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:18,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-01-10 21:51:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:18,046 INFO L225 Difference]: With dead ends: 857 [2022-01-10 21:51:18,046 INFO L226 Difference]: Without dead ends: 462 [2022-01-10 21:51:18,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:18,051 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 143 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 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 21:51:18,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 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 21:51:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-10 21:51:18,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-01-10 21:51:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2022-01-10 21:51:18,091 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 145 [2022-01-10 21:51:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:18,092 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2022-01-10 21:51:18,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2022-01-10 21:51:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-10 21:51:18,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:18,095 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] [2022-01-10 21:51:18,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:51:18,099 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash -528296053, now seen corresponding path program 1 times [2022-01-10 21:51:18,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:18,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194482889] [2022-01-10 21:51:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:18,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:18,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:18,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194482889] [2022-01-10 21:51:18,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194482889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:18,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:18,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:18,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242321463] [2022-01-10 21:51:18,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:18,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:18,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:18,233 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:19,239 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2022-01-10 21:51:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:19,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2022-01-10 21:51:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:19,242 INFO L225 Difference]: With dead ends: 1344 [2022-01-10 21:51:19,242 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 21:51:19,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:19,245 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:19,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:51:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 21:51:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2022-01-10 21:51:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2022-01-10 21:51:19,299 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 153 [2022-01-10 21:51:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:19,299 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2022-01-10 21:51:19,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2022-01-10 21:51:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 21:51:19,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:19,303 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:19,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:51:19,303 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash 68063779, now seen corresponding path program 1 times [2022-01-10 21:51:19,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:19,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21068178] [2022-01-10 21:51:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:19,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:51:19,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:19,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21068178] [2022-01-10 21:51:19,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21068178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:19,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:19,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:19,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993652809] [2022-01-10 21:51:19,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:19,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:19,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:19,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:19,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:19,554 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:20,535 INFO L93 Difference]: Finished difference Result 2559 states and 3882 transitions. [2022-01-10 21:51:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:20,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 160 [2022-01-10 21:51:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:20,540 INFO L225 Difference]: With dead ends: 2559 [2022-01-10 21:51:20,541 INFO L226 Difference]: Without dead ends: 1691 [2022-01-10 21:51:20,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:20,543 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 105 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:20,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 403 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-01-10 21:51:20,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1685. [2022-01-10 21:51:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 1.4388361045130642) internal successors, (2423), 1684 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 2423 transitions. [2022-01-10 21:51:20,568 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 2423 transitions. Word has length 160 [2022-01-10 21:51:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:20,569 INFO L470 AbstractCegarLoop]: Abstraction has 1685 states and 2423 transitions. [2022-01-10 21:51:20,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 2423 transitions. [2022-01-10 21:51:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 21:51:20,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:20,572 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:20,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:51:20,572 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:20,573 INFO L85 PathProgramCache]: Analyzing trace with hash 790847709, now seen corresponding path program 1 times [2022-01-10 21:51:20,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:20,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692958514] [2022-01-10 21:51:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:20,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:51:20,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:20,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692958514] [2022-01-10 21:51:20,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692958514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:20,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:20,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:20,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648162049] [2022-01-10 21:51:20,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:20,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:20,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:20,665 INFO L87 Difference]: Start difference. First operand 1685 states and 2423 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:21,596 INFO L93 Difference]: Finished difference Result 3787 states and 5410 transitions. [2022-01-10 21:51:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-01-10 21:51:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:21,603 INFO L225 Difference]: With dead ends: 3787 [2022-01-10 21:51:21,603 INFO L226 Difference]: Without dead ends: 2104 [2022-01-10 21:51:21,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:21,606 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 218 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:21,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 409 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2022-01-10 21:51:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2100. [2022-01-10 21:51:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 1.4073368270605051) internal successors, (2954), 2099 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 2954 transitions. [2022-01-10 21:51:21,639 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 2954 transitions. Word has length 166 [2022-01-10 21:51:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:21,640 INFO L470 AbstractCegarLoop]: Abstraction has 2100 states and 2954 transitions. [2022-01-10 21:51:21,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 2954 transitions. [2022-01-10 21:51:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 21:51:21,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:21,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:21,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:51:21,643 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1458543527, now seen corresponding path program 1 times [2022-01-10 21:51:21,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:21,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329837115] [2022-01-10 21:51:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:21,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:21,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:21,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329837115] [2022-01-10 21:51:21,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329837115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:21,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:21,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:21,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364120601] [2022-01-10 21:51:21,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:21,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:21,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:21,778 INFO L87 Difference]: Start difference. First operand 2100 states and 2954 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:22,661 INFO L93 Difference]: Finished difference Result 6232 states and 8772 transitions. [2022-01-10 21:51:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:22,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2022-01-10 21:51:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:22,674 INFO L225 Difference]: With dead ends: 6232 [2022-01-10 21:51:22,675 INFO L226 Difference]: Without dead ends: 4134 [2022-01-10 21:51:22,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:22,679 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 224 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:22,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 165 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:51:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2022-01-10 21:51:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 4132. [2022-01-10 21:51:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 4131 states have (on average 1.2856451222464294) internal successors, (5311), 4131 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 5311 transitions. [2022-01-10 21:51:22,742 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 5311 transitions. Word has length 168 [2022-01-10 21:51:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:22,743 INFO L470 AbstractCegarLoop]: Abstraction has 4132 states and 5311 transitions. [2022-01-10 21:51:22,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 5311 transitions. [2022-01-10 21:51:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-10 21:51:22,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:22,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:22,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 21:51:22,756 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:22,756 INFO L85 PathProgramCache]: Analyzing trace with hash 174584800, now seen corresponding path program 1 times [2022-01-10 21:51:22,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:22,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715566447] [2022-01-10 21:51:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:22,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:22,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:22,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715566447] [2022-01-10 21:51:22,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715566447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:22,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:22,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:22,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329583494] [2022-01-10 21:51:22,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:22,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:22,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:22,885 INFO L87 Difference]: Start difference. First operand 4132 states and 5311 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:23,783 INFO L93 Difference]: Finished difference Result 10744 states and 13744 transitions. [2022-01-10 21:51:23,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2022-01-10 21:51:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:23,803 INFO L225 Difference]: With dead ends: 10744 [2022-01-10 21:51:23,804 INFO L226 Difference]: Without dead ends: 6614 [2022-01-10 21:51:23,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:23,811 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 220 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:23,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 193 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:51:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6614 states. [2022-01-10 21:51:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6614 to 6610. [2022-01-10 21:51:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6610 states, 6609 states have (on average 1.2722045695264035) internal successors, (8408), 6609 states have internal predecessors, (8408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6610 states to 6610 states and 8408 transitions. [2022-01-10 21:51:23,902 INFO L78 Accepts]: Start accepts. Automaton has 6610 states and 8408 transitions. Word has length 173 [2022-01-10 21:51:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:23,902 INFO L470 AbstractCegarLoop]: Abstraction has 6610 states and 8408 transitions. [2022-01-10 21:51:23,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6610 states and 8408 transitions. [2022-01-10 21:51:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-10 21:51:23,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:23,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:23,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 21:51:23,909 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1435941950, now seen corresponding path program 1 times [2022-01-10 21:51:23,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:23,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412969058] [2022-01-10 21:51:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:23,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:24,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412969058] [2022-01-10 21:51:24,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412969058] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:24,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:24,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:24,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117145170] [2022-01-10 21:51:24,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:24,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:24,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:24,022 INFO L87 Difference]: Start difference. First operand 6610 states and 8408 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:24,966 INFO L93 Difference]: Finished difference Result 19134 states and 24375 transitions. [2022-01-10 21:51:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:24,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2022-01-10 21:51:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:25,006 INFO L225 Difference]: With dead ends: 19134 [2022-01-10 21:51:25,007 INFO L226 Difference]: Without dead ends: 12526 [2022-01-10 21:51:25,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:25,019 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 232 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:25,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 206 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12526 states. [2022-01-10 21:51:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12526 to 12524. [2022-01-10 21:51:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12524 states, 12523 states have (on average 1.236844206659746) internal successors, (15489), 12523 states have internal predecessors, (15489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12524 states to 12524 states and 15489 transitions. [2022-01-10 21:51:25,250 INFO L78 Accepts]: Start accepts. Automaton has 12524 states and 15489 transitions. Word has length 175 [2022-01-10 21:51:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:25,251 INFO L470 AbstractCegarLoop]: Abstraction has 12524 states and 15489 transitions. [2022-01-10 21:51:25,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 12524 states and 15489 transitions. [2022-01-10 21:51:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-10 21:51:25,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:25,265 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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, 1, 1, 1] [2022-01-10 21:51:25,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 21:51:25,265 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:25,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash 299658812, now seen corresponding path program 1 times [2022-01-10 21:51:25,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:25,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768081269] [2022-01-10 21:51:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:25,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 21:51:25,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768081269] [2022-01-10 21:51:25,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768081269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:25,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:25,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:25,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409022935] [2022-01-10 21:51:25,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:25,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:25,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:25,353 INFO L87 Difference]: Start difference. First operand 12524 states and 15489 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:26,319 INFO L93 Difference]: Finished difference Result 24826 states and 30653 transitions. [2022-01-10 21:51:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 187 [2022-01-10 21:51:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:26,340 INFO L225 Difference]: With dead ends: 24826 [2022-01-10 21:51:26,340 INFO L226 Difference]: Without dead ends: 12304 [2022-01-10 21:51:26,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:26,355 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 279 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:26,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 364 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12304 states. [2022-01-10 21:51:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12304 to 12301. [2022-01-10 21:51:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12301 states, 12300 states have (on average 1.1851219512195121) internal successors, (14577), 12300 states have internal predecessors, (14577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12301 states to 12301 states and 14577 transitions. [2022-01-10 21:51:26,513 INFO L78 Accepts]: Start accepts. Automaton has 12301 states and 14577 transitions. Word has length 187 [2022-01-10 21:51:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:26,514 INFO L470 AbstractCegarLoop]: Abstraction has 12301 states and 14577 transitions. [2022-01-10 21:51:26,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 12301 states and 14577 transitions. [2022-01-10 21:51:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-10 21:51:26,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:26,527 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:26,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 21:51:26,528 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 822124362, now seen corresponding path program 1 times [2022-01-10 21:51:26,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:26,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131011333] [2022-01-10 21:51:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:26,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 21:51:26,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131011333] [2022-01-10 21:51:26,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131011333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:26,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:26,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:26,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505623933] [2022-01-10 21:51:26,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:26,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:26,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:26,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:26,639 INFO L87 Difference]: Start difference. First operand 12301 states and 14577 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:27,196 INFO L93 Difference]: Finished difference Result 23725 states and 28137 transitions. [2022-01-10 21:51:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-01-10 21:51:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:27,212 INFO L225 Difference]: With dead ends: 23725 [2022-01-10 21:51:27,212 INFO L226 Difference]: Without dead ends: 11426 [2022-01-10 21:51:27,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:27,221 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 309 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:27,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 21:51:27,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11426 states. [2022-01-10 21:51:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11426 to 11426. [2022-01-10 21:51:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 1.162363238512035) internal successors, (13280), 11425 states have internal predecessors, (13280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 13280 transitions. [2022-01-10 21:51:27,341 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 13280 transitions. Word has length 196 [2022-01-10 21:51:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:27,342 INFO L470 AbstractCegarLoop]: Abstraction has 11426 states and 13280 transitions. [2022-01-10 21:51:27,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 13280 transitions. [2022-01-10 21:51:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-10 21:51:27,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:27,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:27,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 21:51:27,352 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:27,353 INFO L85 PathProgramCache]: Analyzing trace with hash -242091791, now seen corresponding path program 1 times [2022-01-10 21:51:27,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:27,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195429927] [2022-01-10 21:51:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:27,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:27,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:27,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195429927] [2022-01-10 21:51:27,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195429927] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:27,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:27,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:27,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523945162] [2022-01-10 21:51:27,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:27,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:27,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:27,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:27,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:27,515 INFO L87 Difference]: Start difference. First operand 11426 states and 13280 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:28,437 INFO L93 Difference]: Finished difference Result 29983 states and 34769 transitions. [2022-01-10 21:51:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:28,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-01-10 21:51:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:28,466 INFO L225 Difference]: With dead ends: 29983 [2022-01-10 21:51:28,466 INFO L226 Difference]: Without dead ends: 18559 [2022-01-10 21:51:28,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:28,479 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 168 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:28,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 68 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:51:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18559 states. [2022-01-10 21:51:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18559 to 18558. [2022-01-10 21:51:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18558 states, 18557 states have (on average 1.1444198954572398) internal successors, (21237), 18557 states have internal predecessors, (21237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18558 states to 18558 states and 21237 transitions. [2022-01-10 21:51:28,682 INFO L78 Accepts]: Start accepts. Automaton has 18558 states and 21237 transitions. Word has length 218 [2022-01-10 21:51:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:28,682 INFO L470 AbstractCegarLoop]: Abstraction has 18558 states and 21237 transitions. [2022-01-10 21:51:28,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 18558 states and 21237 transitions. [2022-01-10 21:51:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-10 21:51:28,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:28,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:28,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 21:51:28,699 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1476585037, now seen corresponding path program 1 times [2022-01-10 21:51:28,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:28,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896940314] [2022-01-10 21:51:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:28,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:28,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:28,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896940314] [2022-01-10 21:51:28,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896940314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:28,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:28,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:28,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445254297] [2022-01-10 21:51:28,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:28,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:28,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:28,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:28,885 INFO L87 Difference]: Start difference. First operand 18558 states and 21237 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:29,834 INFO L93 Difference]: Finished difference Result 45869 states and 52772 transitions. [2022-01-10 21:51:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2022-01-10 21:51:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:29,872 INFO L225 Difference]: With dead ends: 45869 [2022-01-10 21:51:29,872 INFO L226 Difference]: Without dead ends: 27313 [2022-01-10 21:51:29,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:29,890 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:29,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 188 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:51:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27313 states. [2022-01-10 21:51:30,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27313 to 27290. [2022-01-10 21:51:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27290 states, 27289 states have (on average 1.1508300047638242) internal successors, (31405), 27289 states have internal predecessors, (31405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27290 states to 27290 states and 31405 transitions. [2022-01-10 21:51:30,244 INFO L78 Accepts]: Start accepts. Automaton has 27290 states and 31405 transitions. Word has length 220 [2022-01-10 21:51:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:30,244 INFO L470 AbstractCegarLoop]: Abstraction has 27290 states and 31405 transitions. [2022-01-10 21:51:30,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 27290 states and 31405 transitions. [2022-01-10 21:51:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-10 21:51:30,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:30,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:51:30,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 21:51:30,262 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:30,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1400483495, now seen corresponding path program 1 times [2022-01-10 21:51:30,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:30,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053844025] [2022-01-10 21:51:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:30,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:30,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053844025] [2022-01-10 21:51:30,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053844025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:51:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622480910] [2022-01-10 21:51:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:30,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:51:30,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:51:30,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:51:30,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 21:51:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:31,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 6911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 21:51:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:51:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:51:31,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:51:31,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622480910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:31,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:51:31,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:51:31,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053020501] [2022-01-10 21:51:31,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:31,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:31,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:31,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:51:31,525 INFO L87 Difference]: Start difference. First operand 27290 states and 31405 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:32,448 INFO L93 Difference]: Finished difference Result 54583 states and 62815 transitions. [2022-01-10 21:51:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2022-01-10 21:51:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:32,486 INFO L225 Difference]: With dead ends: 54583 [2022-01-10 21:51:32,486 INFO L226 Difference]: Without dead ends: 27295 [2022-01-10 21:51:32,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:51:32,506 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 119 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:32,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:51:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27295 states. [2022-01-10 21:51:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27295 to 26681. [2022-01-10 21:51:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26681 states, 26680 states have (on average 1.1438530734632684) internal successors, (30518), 26680 states have internal predecessors, (30518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26681 states to 26681 states and 30518 transitions. [2022-01-10 21:51:32,894 INFO L78 Accepts]: Start accepts. Automaton has 26681 states and 30518 transitions. Word has length 225 [2022-01-10 21:51:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:32,895 INFO L470 AbstractCegarLoop]: Abstraction has 26681 states and 30518 transitions. [2022-01-10 21:51:32,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 26681 states and 30518 transitions. [2022-01-10 21:51:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-10 21:51:32,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:32,913 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:51:32,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 21:51:33,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-10 21:51:33,124 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1004336559, now seen corresponding path program 1 times [2022-01-10 21:51:33,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:33,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119790371] [2022-01-10 21:51:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:33,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:51:33,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:33,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119790371] [2022-01-10 21:51:33,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119790371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:33,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:33,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:33,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232927918] [2022-01-10 21:51:33,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:33,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:33,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:33,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:33,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:33,331 INFO L87 Difference]: Start difference. First operand 26681 states and 30518 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:34,240 INFO L93 Difference]: Finished difference Result 53377 states and 61066 transitions. [2022-01-10 21:51:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:34,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 21:51:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:34,272 INFO L225 Difference]: With dead ends: 53377 [2022-01-10 21:51:34,272 INFO L226 Difference]: Without dead ends: 26698 [2022-01-10 21:51:34,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:34,289 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 210 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:34,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 328 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:51:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26698 states. [2022-01-10 21:51:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26698 to 26675. [2022-01-10 21:51:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26675 states, 26674 states have (on average 1.136087575916623) internal successors, (30304), 26674 states have internal predecessors, (30304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26675 states to 26675 states and 30304 transitions. [2022-01-10 21:51:34,688 INFO L78 Accepts]: Start accepts. Automaton has 26675 states and 30304 transitions. Word has length 248 [2022-01-10 21:51:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:34,688 INFO L470 AbstractCegarLoop]: Abstraction has 26675 states and 30304 transitions. [2022-01-10 21:51:34,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 26675 states and 30304 transitions. [2022-01-10 21:51:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-10 21:51:34,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:34,705 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:34,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 21:51:34,705 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1740224326, now seen corresponding path program 1 times [2022-01-10 21:51:34,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:34,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868608730] [2022-01-10 21:51:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:34,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-01-10 21:51:34,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:34,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868608730] [2022-01-10 21:51:34,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868608730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:34,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:34,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:34,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388736235] [2022-01-10 21:51:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:34,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:34,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:34,830 INFO L87 Difference]: Start difference. First operand 26675 states and 30304 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:35,924 INFO L93 Difference]: Finished difference Result 53152 states and 60365 transitions. [2022-01-10 21:51:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:35,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-01-10 21:51:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:35,958 INFO L225 Difference]: With dead ends: 53152 [2022-01-10 21:51:35,958 INFO L226 Difference]: Without dead ends: 26479 [2022-01-10 21:51:35,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:35,974 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 206 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:35,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 358 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26479 states. [2022-01-10 21:51:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26479 to 26472. [2022-01-10 21:51:36,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26472 states, 26471 states have (on average 1.1329757092667447) internal successors, (29991), 26471 states have internal predecessors, (29991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26472 states to 26472 states and 29991 transitions. [2022-01-10 21:51:36,248 INFO L78 Accepts]: Start accepts. Automaton has 26472 states and 29991 transitions. Word has length 251 [2022-01-10 21:51:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:36,248 INFO L470 AbstractCegarLoop]: Abstraction has 26472 states and 29991 transitions. [2022-01-10 21:51:36,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 26472 states and 29991 transitions. [2022-01-10 21:51:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-10 21:51:36,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:36,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:36,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 21:51:36,263 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:36,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:36,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1485752394, now seen corresponding path program 1 times [2022-01-10 21:51:36,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:36,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282413806] [2022-01-10 21:51:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:36,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:51:36,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:36,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282413806] [2022-01-10 21:51:36,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282413806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:36,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:36,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:36,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836535017] [2022-01-10 21:51:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:36,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:36,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:36,552 INFO L87 Difference]: Start difference. First operand 26472 states and 29991 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:37,755 INFO L93 Difference]: Finished difference Result 70853 states and 80331 transitions. [2022-01-10 21:51:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:51:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 21:51:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:37,806 INFO L225 Difference]: With dead ends: 70853 [2022-01-10 21:51:37,806 INFO L226 Difference]: Without dead ends: 44383 [2022-01-10 21:51:37,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:37,824 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 607 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:37,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 297 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:51:37,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44383 states. [2022-01-10 21:51:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44383 to 33989. [2022-01-10 21:51:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 1.1332234906437566) internal successors, (38516), 33988 states have internal predecessors, (38516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 38516 transitions. [2022-01-10 21:51:38,282 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 38516 transitions. Word has length 253 [2022-01-10 21:51:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:38,283 INFO L470 AbstractCegarLoop]: Abstraction has 33989 states and 38516 transitions. [2022-01-10 21:51:38,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 38516 transitions. [2022-01-10 21:51:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-01-10 21:51:38,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:38,299 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:38,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 21:51:38,300 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1259997225, now seen corresponding path program 1 times [2022-01-10 21:51:38,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:38,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250478979] [2022-01-10 21:51:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:38,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-01-10 21:51:38,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:38,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250478979] [2022-01-10 21:51:38,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250478979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:38,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:38,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:38,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427255658] [2022-01-10 21:51:38,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:38,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:38,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:38,546 INFO L87 Difference]: Start difference. First operand 33989 states and 38516 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:39,881 INFO L93 Difference]: Finished difference Result 94852 states and 107646 transitions. [2022-01-10 21:51:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:51:39,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 284 [2022-01-10 21:51:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:39,961 INFO L225 Difference]: With dead ends: 94852 [2022-01-10 21:51:39,961 INFO L226 Difference]: Without dead ends: 60865 [2022-01-10 21:51:39,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:39,986 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 480 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:39,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 478 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:51:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60865 states. [2022-01-10 21:51:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60865 to 60038. [2022-01-10 21:51:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60038 states, 60037 states have (on average 1.1328514082982162) internal successors, (68013), 60037 states have internal predecessors, (68013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60038 states to 60038 states and 68013 transitions. [2022-01-10 21:51:40,885 INFO L78 Accepts]: Start accepts. Automaton has 60038 states and 68013 transitions. Word has length 284 [2022-01-10 21:51:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:40,886 INFO L470 AbstractCegarLoop]: Abstraction has 60038 states and 68013 transitions. [2022-01-10 21:51:40,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 60038 states and 68013 transitions. [2022-01-10 21:51:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-01-10 21:51:40,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:40,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:51:40,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 21:51:40,906 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash 915044480, now seen corresponding path program 1 times [2022-01-10 21:51:40,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:40,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207017252] [2022-01-10 21:51:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:40,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:41,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207017252] [2022-01-10 21:51:41,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207017252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:41,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:41,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:41,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273537246] [2022-01-10 21:51:41,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:41,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:41,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:41,316 INFO L87 Difference]: Start difference. First operand 60038 states and 68013 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:42,322 INFO L93 Difference]: Finished difference Result 131651 states and 148376 transitions. [2022-01-10 21:51:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:42,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 284 [2022-01-10 21:51:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:42,409 INFO L225 Difference]: With dead ends: 131651 [2022-01-10 21:51:42,409 INFO L226 Difference]: Without dead ends: 71615 [2022-01-10 21:51:42,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:42,535 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:42,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 378 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:51:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71615 states. [2022-01-10 21:51:43,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71615 to 71609. [2022-01-10 21:51:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71609 states, 71608 states have (on average 1.1193162775108927) internal successors, (80152), 71608 states have internal predecessors, (80152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71609 states to 71609 states and 80152 transitions. [2022-01-10 21:51:43,403 INFO L78 Accepts]: Start accepts. Automaton has 71609 states and 80152 transitions. Word has length 284 [2022-01-10 21:51:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:43,404 INFO L470 AbstractCegarLoop]: Abstraction has 71609 states and 80152 transitions. [2022-01-10 21:51:43,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 71609 states and 80152 transitions. [2022-01-10 21:51:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-10 21:51:43,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:43,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:43,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 21:51:43,579 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash 588762219, now seen corresponding path program 1 times [2022-01-10 21:51:43,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637202298] [2022-01-10 21:51:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:43,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:43,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:43,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637202298] [2022-01-10 21:51:43,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637202298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:43,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:43,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:43,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850507238] [2022-01-10 21:51:43,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:43,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:43,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:43,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:43,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:43,847 INFO L87 Difference]: Start difference. First operand 71609 states and 80152 transitions. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:45,433 INFO L93 Difference]: Finished difference Result 202995 states and 226265 transitions. [2022-01-10 21:51:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:51:45,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 21:51:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:45,614 INFO L225 Difference]: With dead ends: 202995 [2022-01-10 21:51:45,614 INFO L226 Difference]: Without dead ends: 131388 [2022-01-10 21:51:45,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:45,662 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 365 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:45,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 503 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:51:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131388 states. [2022-01-10 21:51:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131388 to 131377. [2022-01-10 21:51:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131377 states, 131376 states have (on average 1.1112988673730362) internal successors, (145998), 131376 states have internal predecessors, (145998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131377 states to 131377 states and 145998 transitions. [2022-01-10 21:51:47,711 INFO L78 Accepts]: Start accepts. Automaton has 131377 states and 145998 transitions. Word has length 306 [2022-01-10 21:51:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:47,711 INFO L470 AbstractCegarLoop]: Abstraction has 131377 states and 145998 transitions. [2022-01-10 21:51:47,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 131377 states and 145998 transitions. [2022-01-10 21:51:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-10 21:51:47,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:47,771 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:47,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 21:51:47,771 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1702216610, now seen corresponding path program 1 times [2022-01-10 21:51:47,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:47,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86399141] [2022-01-10 21:51:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:47,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-01-10 21:51:47,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86399141] [2022-01-10 21:51:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86399141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:51:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932027393] [2022-01-10 21:51:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:47,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:51:47,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:51:47,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:51:47,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 21:51:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:48,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 9960 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 21:51:48,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:51:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:51:49,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:51:49,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932027393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:49,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:51:49,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:51:49,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352482942] [2022-01-10 21:51:49,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:49,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:49,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:49,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:49,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:51:49,266 INFO L87 Difference]: Start difference. First operand 131377 states and 145998 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:50,622 INFO L93 Difference]: Finished difference Result 251169 states and 278971 transitions. [2022-01-10 21:51:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 323 [2022-01-10 21:51:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:50,971 INFO L225 Difference]: With dead ends: 251169 [2022-01-10 21:51:50,971 INFO L226 Difference]: Without dead ends: 119794 [2022-01-10 21:51:51,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:51:51,034 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 121 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:51,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 314 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:51:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119794 states. [2022-01-10 21:51:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119794 to 110443. [2022-01-10 21:51:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110443 states, 110442 states have (on average 1.0947284547545317) internal successors, (120904), 110442 states have internal predecessors, (120904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110443 states to 110443 states and 120904 transitions. [2022-01-10 21:51:52,580 INFO L78 Accepts]: Start accepts. Automaton has 110443 states and 120904 transitions. Word has length 323 [2022-01-10 21:51:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:52,580 INFO L470 AbstractCegarLoop]: Abstraction has 110443 states and 120904 transitions. [2022-01-10 21:51:52,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 110443 states and 120904 transitions. [2022-01-10 21:51:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-01-10 21:51:52,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:52,841 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:51:52,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 21:51:53,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:51:53,041 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash -976861443, now seen corresponding path program 1 times [2022-01-10 21:51:53,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:53,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785908520] [2022-01-10 21:51:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:53,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-10 21:51:53,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:53,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785908520] [2022-01-10 21:51:53,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785908520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:53,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:53,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:53,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302019699] [2022-01-10 21:51:53,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:53,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:53,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:53,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:53,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:53,203 INFO L87 Difference]: Start difference. First operand 110443 states and 120904 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:54,529 INFO L93 Difference]: Finished difference Result 226414 states and 247896 transitions. [2022-01-10 21:51:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:54,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 344 [2022-01-10 21:51:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:54,832 INFO L225 Difference]: With dead ends: 226414 [2022-01-10 21:51:54,832 INFO L226 Difference]: Without dead ends: 106432 [2022-01-10 21:51:54,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:54,913 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 169 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:54,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 336 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:51:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106432 states. [2022-01-10 21:51:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106432 to 96639. [2022-01-10 21:51:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96639 states, 96638 states have (on average 1.0653780086508413) internal successors, (102956), 96638 states have internal predecessors, (102956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96639 states to 96639 states and 102956 transitions. [2022-01-10 21:51:56,471 INFO L78 Accepts]: Start accepts. Automaton has 96639 states and 102956 transitions. Word has length 344 [2022-01-10 21:51:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:56,472 INFO L470 AbstractCegarLoop]: Abstraction has 96639 states and 102956 transitions. [2022-01-10 21:51:56,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 96639 states and 102956 transitions. [2022-01-10 21:51:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-10 21:51:56,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:56,512 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:56,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 21:51:56,513 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:56,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1417938940, now seen corresponding path program 1 times [2022-01-10 21:51:56,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:56,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473753691] [2022-01-10 21:51:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:56,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-10 21:51:56,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:56,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473753691] [2022-01-10 21:51:56,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473753691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:56,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:56,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:56,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372624647] [2022-01-10 21:51:56,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:56,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:56,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:56,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:56,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:56,649 INFO L87 Difference]: Start difference. First operand 96639 states and 102956 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:57,526 INFO L93 Difference]: Finished difference Result 257707 states and 274464 transitions. [2022-01-10 21:51:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:57,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 361 [2022-01-10 21:51:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:57,717 INFO L225 Difference]: With dead ends: 257707 [2022-01-10 21:51:57,717 INFO L226 Difference]: Without dead ends: 161070 [2022-01-10 21:51:57,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:57,973 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 270 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:57,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 783 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 21:51:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161070 states. [2022-01-10 21:51:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161070 to 150104. [2022-01-10 21:51:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150104 states, 150103 states have (on average 1.063796193280614) internal successors, (159679), 150103 states have internal predecessors, (159679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:52:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150104 states to 150104 states and 159679 transitions. [2022-01-10 21:52:00,157 INFO L78 Accepts]: Start accepts. Automaton has 150104 states and 159679 transitions. Word has length 361 [2022-01-10 21:52:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:00,157 INFO L470 AbstractCegarLoop]: Abstraction has 150104 states and 159679 transitions. [2022-01-10 21:52:00,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:52:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 150104 states and 159679 transitions. [2022-01-10 21:52:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-10 21:52:00,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:00,195 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:52:00,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 21:52:00,196 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:00,196 INFO L85 PathProgramCache]: Analyzing trace with hash 10694376, now seen corresponding path program 1 times [2022-01-10 21:52:00,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:00,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225352891] [2022-01-10 21:52:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:00,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-10 21:52:00,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:00,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225352891] [2022-01-10 21:52:00,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225352891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:00,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:00,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:00,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049695944] [2022-01-10 21:52:00,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:00,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:00,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:00,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:00,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:00,616 INFO L87 Difference]: Start difference. First operand 150104 states and 159679 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:52:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:02,146 INFO L93 Difference]: Finished difference Result 440336 states and 468423 transitions. [2022-01-10 21:52:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 363 [2022-01-10 21:52:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:02,628 INFO L225 Difference]: With dead ends: 440336 [2022-01-10 21:52:02,628 INFO L226 Difference]: Without dead ends: 290234 [2022-01-10 21:52:02,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:02,724 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 181 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:02,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 476 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 21:52:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290234 states. [2022-01-10 21:52:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290234 to 290029. [2022-01-10 21:52:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290029 states, 290028 states have (on average 1.0634697339567214) internal successors, (308436), 290028 states have internal predecessors, (308436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:52:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290029 states to 290029 states and 308436 transitions. [2022-01-10 21:52:06,745 INFO L78 Accepts]: Start accepts. Automaton has 290029 states and 308436 transitions. Word has length 363 [2022-01-10 21:52:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:06,745 INFO L470 AbstractCegarLoop]: Abstraction has 290029 states and 308436 transitions. [2022-01-10 21:52:06,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:52:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 290029 states and 308436 transitions. [2022-01-10 21:52:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-01-10 21:52:06,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:06,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:52:06,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-10 21:52:06,788 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:06,788 INFO L85 PathProgramCache]: Analyzing trace with hash 205059182, now seen corresponding path program 1 times [2022-01-10 21:52:06,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:06,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953358330] [2022-01-10 21:52:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:06,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 141 proven. 6 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-10 21:52:06,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953358330] [2022-01-10 21:52:06,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953358330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:52:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399631767] [2022-01-10 21:52:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:06,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:52:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:52:06,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:52:06,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 21:52:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 11595 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 21:52:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:52:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-10 21:52:08,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:52:08,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399631767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:08,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:52:08,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:52:08,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890326835] [2022-01-10 21:52:08,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:08,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:08,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 21:52:08,623 INFO L87 Difference]: Start difference. First operand 290029 states and 308436 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)