/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 15:59:29,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 15:59:29,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 15:59:29,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 15:59:29,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 15:59:29,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 15:59:29,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 15:59:29,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 15:59:29,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 15:59:29,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 15:59:29,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 15:59:29,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 15:59:29,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 15:59:29,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 15:59:29,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 15:59:29,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 15:59:29,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 15:59:29,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 15:59:29,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 15:59:29,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 15:59:29,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 15:59:29,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 15:59:29,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 15:59:29,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 15:59:29,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 15:59:29,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 15:59:29,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 15:59:29,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 15:59:29,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 15:59:29,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 15:59:29,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 15:59:29,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 15:59:29,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 15:59:29,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 15:59:29,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 15:59:29,863 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 15:59:29,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 15:59:29,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 15:59:29,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 15:59:29,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 15:59:29,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 15:59:29,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 15:59:29,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 15:59:29,865 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 15:59:29,865 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 15:59:29,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 15:59:29,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 15:59:29,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 15:59:29,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 15:59:29,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 15:59:29,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:59:29,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 15:59:29,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 15:59:29,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 15:59:29,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 15:59:29,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 15:59:29,868 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 15:59:29,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 15:59:29,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 15:59:29,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 15:59:29,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 15:59:29,870 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 15:59:29,870 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 15:59:30,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 15:59:30,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 15:59:30,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 15:59:30,141 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 15:59:30,144 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 15:59:30,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label09.c [2022-01-10 15:59:30,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a98afe590/d270c2be22c243599da5a2b119b96e6d/FLAGf17146aca [2022-01-10 15:59:30,743 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 15:59:30,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label09.c [2022-01-10 15:59:30,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a98afe590/d270c2be22c243599da5a2b119b96e6d/FLAGf17146aca [2022-01-10 15:59:31,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a98afe590/d270c2be22c243599da5a2b119b96e6d [2022-01-10 15:59:31,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 15:59:31,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 15:59:31,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 15:59:31,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 15:59:31,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 15:59:31,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7354aaee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31, skipping insertion in model container [2022-01-10 15:59:31,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 15:59:31,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 15:59:31,733 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_label09.c[54191,54204] [2022-01-10 15:59:31,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:59:31,789 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 15:59:31,954 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_label09.c[54191,54204] [2022-01-10 15:59:31,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:59:31,991 INFO L208 MainTranslator]: Completed translation [2022-01-10 15:59:31,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31 WrapperNode [2022-01-10 15:59:31,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 15:59:31,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 15:59:31,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 15:59:31,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 15:59:32,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,123 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 15:59:32,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 15:59:32,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 15:59:32,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 15:59:32,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 15:59:32,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 15:59:32,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 15:59:32,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 15:59:32,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 15:59:32,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:32,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:59:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:59:32,273 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 15:59:32,280 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 15:59:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 15:59:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 15:59:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 15:59:32,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 15:59:32,380 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 15:59:32,381 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 15:59:34,236 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 15:59:34,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 15:59:34,247 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 15:59:34,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:59:34 BoogieIcfgContainer [2022-01-10 15:59:34,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 15:59:34,250 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 15:59:34,250 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 15:59:34,252 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 15:59:34,254 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:59:34" (1/1) ... [2022-01-10 15:59:34,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:59:34 BasicIcfg [2022-01-10 15:59:34,646 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 15:59:34,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 15:59:34,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 15:59:34,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 15:59:34,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:59:31" (1/4) ... [2022-01-10 15:59:34,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ce0579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:59:34, skipping insertion in model container [2022-01-10 15:59:34,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (2/4) ... [2022-01-10 15:59:34,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ce0579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:59:34, skipping insertion in model container [2022-01-10 15:59:34,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:59:34" (3/4) ... [2022-01-10 15:59:34,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ce0579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 03:59:34, skipping insertion in model container [2022-01-10 15:59:34,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:59:34" (4/4) ... [2022-01-10 15:59:34,652 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label09.cTransformedIcfg [2022-01-10 15:59:34,656 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 15:59:34,657 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 15:59:34,694 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 15:59:34,700 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 15:59:34,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 15:59:34,717 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 15:59:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 15:59:34,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:34,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:34,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:34,732 INFO L85 PathProgramCache]: Analyzing trace with hash 863408942, now seen corresponding path program 1 times [2022-01-10 15:59:34,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:34,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123233236] [2022-01-10 15:59:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:34,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:35,417 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 15:59:35,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:35,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123233236] [2022-01-10 15:59:35,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123233236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:35,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:35,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:35,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420643128] [2022-01-10 15:59:35,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:35,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:35,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:35,463 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 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 15:59:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:36,817 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2022-01-10 15:59:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2022-01-10 15:59:36,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:36,832 INFO L225 Difference]: With dead ends: 864 [2022-01-10 15:59:36,832 INFO L226 Difference]: Without dead ends: 468 [2022-01-10 15:59:36,836 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 15:59:36,839 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 130 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:36,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 165 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 15:59:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-10 15:59:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2022-01-10 15:59:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2022-01-10 15:59:36,896 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 148 [2022-01-10 15:59:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:36,897 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2022-01-10 15:59:36,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 15:59:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2022-01-10 15:59:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-10 15:59:36,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:36,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:36,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 15:59:36,901 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:36,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1670321496, now seen corresponding path program 1 times [2022-01-10 15:59:36,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:36,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41737712] [2022-01-10 15:59:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:36,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:59:37,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41737712] [2022-01-10 15:59:37,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41737712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:37,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:37,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:37,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564799885] [2022-01-10 15:59:37,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:37,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:37,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:37,071 INFO L87 Difference]: Start difference. First operand 454 states and 737 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 15:59:37,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:37,498 INFO L93 Difference]: Finished difference Result 1345 states and 2190 transitions. [2022-01-10 15:59:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:37,498 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 15:59:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:37,503 INFO L225 Difference]: With dead ends: 1345 [2022-01-10 15:59:37,503 INFO L226 Difference]: Without dead ends: 893 [2022-01-10 15:59:37,505 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 15:59:37,506 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:37,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 15:59:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-10 15:59:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 891. [2022-01-10 15:59:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.6258426966292134) internal successors, (1447), 890 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1447 transitions. [2022-01-10 15:59:37,549 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1447 transitions. Word has length 153 [2022-01-10 15:59:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:37,549 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1447 transitions. [2022-01-10 15:59:37,549 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 15:59:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1447 transitions. [2022-01-10 15:59:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-10 15:59:37,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:37,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:37,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 15:59:37,557 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:37,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1814962357, now seen corresponding path program 1 times [2022-01-10 15:59:37,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:37,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566198335] [2022-01-10 15:59:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:37,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:59:37,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:37,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566198335] [2022-01-10 15:59:37,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566198335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:37,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:37,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:37,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241244732] [2022-01-10 15:59:37,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:37,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:37,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:37,684 INFO L87 Difference]: Start difference. First operand 891 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 15:59:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:38,796 INFO L93 Difference]: Finished difference Result 2620 states and 4271 transitions. [2022-01-10 15:59:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:38,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2022-01-10 15:59:38,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:38,805 INFO L225 Difference]: With dead ends: 2620 [2022-01-10 15:59:38,805 INFO L226 Difference]: Without dead ends: 1731 [2022-01-10 15:59:38,807 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 15:59:38,808 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 252 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:38,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 162 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 15:59:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-01-10 15:59:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1726. [2022-01-10 15:59:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.5217391304347827) internal successors, (2625), 1725 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2625 transitions. [2022-01-10 15:59:38,846 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2625 transitions. Word has length 154 [2022-01-10 15:59:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:38,846 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2625 transitions. [2022-01-10 15:59:38,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 15:59:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2625 transitions. [2022-01-10 15:59:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 15:59:38,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:38,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:38,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 15:59:38,850 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1704910830, now seen corresponding path program 1 times [2022-01-10 15:59:38,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:38,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070856337] [2022-01-10 15:59:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:38,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:38,951 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 15:59:38,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070856337] [2022-01-10 15:59:38,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070856337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:38,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:38,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:38,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236454725] [2022-01-10 15:59:38,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:38,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:38,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:38,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:38,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:38,953 INFO L87 Difference]: Start difference. First operand 1726 states and 2625 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 15:59:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:40,091 INFO L93 Difference]: Finished difference Result 5105 states and 7793 transitions. [2022-01-10 15:59:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2022-01-10 15:59:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:40,105 INFO L225 Difference]: With dead ends: 5105 [2022-01-10 15:59:40,105 INFO L226 Difference]: Without dead ends: 3381 [2022-01-10 15:59:40,108 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 15:59:40,110 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:40,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 94 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 15:59:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2022-01-10 15:59:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 3352. [2022-01-10 15:59:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 1.495971351835273) internal successors, (5013), 3351 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:40,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 5013 transitions. [2022-01-10 15:59:40,179 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 5013 transitions. Word has length 156 [2022-01-10 15:59:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:40,179 INFO L470 AbstractCegarLoop]: Abstraction has 3352 states and 5013 transitions. [2022-01-10 15:59:40,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 15:59:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 5013 transitions. [2022-01-10 15:59:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 15:59:40,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:40,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:40,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 15:59:40,185 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:40,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:40,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1916011892, now seen corresponding path program 1 times [2022-01-10 15:59:40,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:40,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385616116] [2022-01-10 15:59:40,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:40,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 15:59:40,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:40,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385616116] [2022-01-10 15:59:40,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385616116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:40,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:40,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:40,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502815115] [2022-01-10 15:59:40,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:40,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:40,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:40,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:40,292 INFO L87 Difference]: Start difference. First operand 3352 states and 5013 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 15:59:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:41,485 INFO L93 Difference]: Finished difference Result 8343 states and 12434 transitions. [2022-01-10 15:59:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:41,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 165 [2022-01-10 15:59:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:41,505 INFO L225 Difference]: With dead ends: 8343 [2022-01-10 15:59:41,505 INFO L226 Difference]: Without dead ends: 4993 [2022-01-10 15:59:41,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:41,512 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:41,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 117 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 15:59:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-01-10 15:59:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4991. [2022-01-10 15:59:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4991 states, 4990 states have (on average 1.4627254509018035) internal successors, (7299), 4990 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4991 states to 4991 states and 7299 transitions. [2022-01-10 15:59:41,611 INFO L78 Accepts]: Start accepts. Automaton has 4991 states and 7299 transitions. Word has length 165 [2022-01-10 15:59:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:41,612 INFO L470 AbstractCegarLoop]: Abstraction has 4991 states and 7299 transitions. [2022-01-10 15:59:41,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 15:59:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4991 states and 7299 transitions. [2022-01-10 15:59:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 15:59:41,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:41,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:41,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 15:59:41,620 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:41,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1978894392, now seen corresponding path program 1 times [2022-01-10 15:59:41,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:41,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307456520] [2022-01-10 15:59:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:41,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:59:41,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:41,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307456520] [2022-01-10 15:59:41,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307456520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:41,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:41,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:41,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590992146] [2022-01-10 15:59:41,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:41,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:41,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:41,733 INFO L87 Difference]: Start difference. First operand 4991 states and 7299 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 15:59:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:42,776 INFO L93 Difference]: Finished difference Result 14856 states and 21741 transitions. [2022-01-10 15:59:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 167 [2022-01-10 15:59:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:42,809 INFO L225 Difference]: With dead ends: 14856 [2022-01-10 15:59:42,809 INFO L226 Difference]: Without dead ends: 9867 [2022-01-10 15:59:42,818 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 15:59:42,819 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 228 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:42,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 165 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 15:59:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2022-01-10 15:59:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 9864. [2022-01-10 15:59:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9864 states, 9863 states have (on average 1.3184629423096421) internal successors, (13004), 9863 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9864 states to 9864 states and 13004 transitions. [2022-01-10 15:59:42,988 INFO L78 Accepts]: Start accepts. Automaton has 9864 states and 13004 transitions. Word has length 167 [2022-01-10 15:59:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:42,989 INFO L470 AbstractCegarLoop]: Abstraction has 9864 states and 13004 transitions. [2022-01-10 15:59:42,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 15:59:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9864 states and 13004 transitions. [2022-01-10 15:59:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 15:59:42,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:42,999 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:43,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 15:59:43,000 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1758978250, now seen corresponding path program 1 times [2022-01-10 15:59:43,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:43,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46469901] [2022-01-10 15:59:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:43,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 15:59:43,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:43,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46469901] [2022-01-10 15:59:43,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46469901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:43,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:43,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:43,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047698430] [2022-01-10 15:59:43,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:43,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:43,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:43,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:43,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:43,184 INFO L87 Difference]: Start difference. First operand 9864 states and 13004 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 15:59:44,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:44,398 INFO L93 Difference]: Finished difference Result 28667 states and 37818 transitions. [2022-01-10 15:59:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:44,399 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 170 [2022-01-10 15:59:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:44,438 INFO L225 Difference]: With dead ends: 28667 [2022-01-10 15:59:44,439 INFO L226 Difference]: Without dead ends: 18805 [2022-01-10 15:59:44,454 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 15:59:44,455 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 257 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:44,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 397 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 15:59:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18805 states. [2022-01-10 15:59:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18805 to 18803. [2022-01-10 15:59:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18803 states, 18802 states have (on average 1.2522603978300182) internal successors, (23545), 18802 states have internal predecessors, (23545), 0 states have call successors, (0), 0 states 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 15:59:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18803 states to 18803 states and 23545 transitions. [2022-01-10 15:59:44,797 INFO L78 Accepts]: Start accepts. Automaton has 18803 states and 23545 transitions. Word has length 170 [2022-01-10 15:59:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:44,799 INFO L470 AbstractCegarLoop]: Abstraction has 18803 states and 23545 transitions. [2022-01-10 15:59:44,799 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 15:59:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 18803 states and 23545 transitions. [2022-01-10 15:59:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 15:59:44,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:44,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:44,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 15:59:44,816 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1841601548, now seen corresponding path program 2 times [2022-01-10 15:59:44,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:44,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312635701] [2022-01-10 15:59:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:44,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 15:59:44,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:44,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312635701] [2022-01-10 15:59:44,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312635701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:44,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:44,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:44,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806522208] [2022-01-10 15:59:44,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:44,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:44,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:44,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:44,938 INFO L87 Difference]: Start difference. First operand 18803 states and 23545 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 15:59:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:46,069 INFO L93 Difference]: Finished difference Result 45525 states and 56085 transitions. [2022-01-10 15:59:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 172 [2022-01-10 15:59:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:46,119 INFO L225 Difference]: With dead ends: 45525 [2022-01-10 15:59:46,120 INFO L226 Difference]: Without dead ends: 26724 [2022-01-10 15:59:46,143 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 15:59:46,144 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 232 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:46,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 414 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 15:59:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26724 states. [2022-01-10 15:59:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26724 to 23878. [2022-01-10 15:59:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23878 states, 23877 states have (on average 1.2228504418478032) internal successors, (29198), 23877 states have internal predecessors, (29198), 0 states have call successors, (0), 0 states 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 15:59:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23878 states to 23878 states and 29198 transitions. [2022-01-10 15:59:46,507 INFO L78 Accepts]: Start accepts. Automaton has 23878 states and 29198 transitions. Word has length 172 [2022-01-10 15:59:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:46,509 INFO L470 AbstractCegarLoop]: Abstraction has 23878 states and 29198 transitions. [2022-01-10 15:59:46,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 15:59:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 23878 states and 29198 transitions. [2022-01-10 15:59:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-10 15:59:46,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:46,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:46,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 15:59:46,530 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1623185772, now seen corresponding path program 1 times [2022-01-10 15:59:46,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:46,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946344790] [2022-01-10 15:59:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:46,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:59:46,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:46,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946344790] [2022-01-10 15:59:46,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946344790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:46,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:46,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:46,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594684955] [2022-01-10 15:59:46,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:46,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 15:59:46,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:46,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 15:59:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 15:59:46,742 INFO L87 Difference]: Start difference. First operand 23878 states and 29198 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:48,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:48,353 INFO L93 Difference]: Finished difference Result 72245 states and 88629 transitions. [2022-01-10 15:59:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 15:59:48,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2022-01-10 15:59:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:48,433 INFO L225 Difference]: With dead ends: 72245 [2022-01-10 15:59:48,433 INFO L226 Difference]: Without dead ends: 48369 [2022-01-10 15:59:48,458 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 15:59:48,459 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 533 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:48,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 526 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 15:59:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2022-01-10 15:59:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 48329. [2022-01-10 15:59:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48329 states, 48328 states have (on average 1.219562158583016) internal successors, (58939), 48328 states have internal predecessors, (58939), 0 states have call successors, (0), 0 states 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 15:59:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48329 states to 48329 states and 58939 transitions. [2022-01-10 15:59:49,188 INFO L78 Accepts]: Start accepts. Automaton has 48329 states and 58939 transitions. Word has length 186 [2022-01-10 15:59:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:49,188 INFO L470 AbstractCegarLoop]: Abstraction has 48329 states and 58939 transitions. [2022-01-10 15:59:49,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 48329 states and 58939 transitions. [2022-01-10 15:59:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-10 15:59:49,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:49,224 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:49,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 15:59:49,224 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:49,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1670699081, now seen corresponding path program 1 times [2022-01-10 15:59:49,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:49,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107318513] [2022-01-10 15:59:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:49,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 15:59:49,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107318513] [2022-01-10 15:59:49,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107318513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:49,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:49,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:49,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689693441] [2022-01-10 15:59:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:49,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:49,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:49,508 INFO L87 Difference]: Start difference. First operand 48329 states and 58939 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 15:59:50,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:50,683 INFO L93 Difference]: Finished difference Result 96051 states and 117100 transitions. [2022-01-10 15:59:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:50,684 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 197 [2022-01-10 15:59:50,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:50,765 INFO L225 Difference]: With dead ends: 96051 [2022-01-10 15:59:50,765 INFO L226 Difference]: Without dead ends: 47724 [2022-01-10 15:59:50,967 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 15:59:50,974 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 232 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:50,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 150 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 15:59:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47724 states. [2022-01-10 15:59:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47724 to 47314. [2022-01-10 15:59:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47314 states, 47313 states have (on average 1.1795278253334178) internal successors, (55807), 47313 states have internal predecessors, (55807), 0 states have call successors, (0), 0 states 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 15:59:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47314 states to 47314 states and 55807 transitions. [2022-01-10 15:59:51,758 INFO L78 Accepts]: Start accepts. Automaton has 47314 states and 55807 transitions. Word has length 197 [2022-01-10 15:59:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:51,758 INFO L470 AbstractCegarLoop]: Abstraction has 47314 states and 55807 transitions. [2022-01-10 15:59:51,758 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 15:59:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 47314 states and 55807 transitions. [2022-01-10 15:59:51,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-10 15:59:51,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:51,812 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:51,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 15:59:51,813 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:51,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:51,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1109571635, now seen corresponding path program 1 times [2022-01-10 15:59:51,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:51,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926858068] [2022-01-10 15:59:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:51,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-01-10 15:59:52,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:52,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926858068] [2022-01-10 15:59:52,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926858068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:59:52,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026025511] [2022-01-10 15:59:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:52,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:59:52,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:59:52,095 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 15:59:52,097 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 15:59:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 7250 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 15:59:52,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:59:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 15:59:53,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 15:59:53,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026025511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:53,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 15:59:53,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 15:59:53,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996328481] [2022-01-10 15:59:53,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:53,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:53,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:53,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 15:59:53,364 INFO L87 Difference]: Start difference. First operand 47314 states and 55807 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:54,582 INFO L93 Difference]: Finished difference Result 94632 states and 111622 transitions. [2022-01-10 15:59:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-01-10 15:59:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:54,635 INFO L225 Difference]: With dead ends: 94632 [2022-01-10 15:59:54,635 INFO L226 Difference]: Without dead ends: 47320 [2022-01-10 15:59:54,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 15:59:54,665 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 258 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:54,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 97 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 15:59:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47320 states. [2022-01-10 15:59:55,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47320 to 46705. [2022-01-10 15:59:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46705 states, 46704 states have (on average 1.1690861596437137) internal successors, (54601), 46704 states have internal predecessors, (54601), 0 states have call successors, (0), 0 states 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 15:59:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46705 states to 46705 states and 54601 transitions. [2022-01-10 15:59:55,398 INFO L78 Accepts]: Start accepts. Automaton has 46705 states and 54601 transitions. Word has length 239 [2022-01-10 15:59:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:55,398 INFO L470 AbstractCegarLoop]: Abstraction has 46705 states and 54601 transitions. [2022-01-10 15:59:55,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:59:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 46705 states and 54601 transitions. [2022-01-10 15:59:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-10 15:59:55,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:55,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:55,461 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 15:59:55,649 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,SelfDestructingSolverStorable10 [2022-01-10 15:59:55,649 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:55,650 INFO L85 PathProgramCache]: Analyzing trace with hash -274529004, now seen corresponding path program 1 times [2022-01-10 15:59:55,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:55,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94789228] [2022-01-10 15:59:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:55,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 15:59:55,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:55,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94789228] [2022-01-10 15:59:55,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94789228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:55,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:55,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:55,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142481266] [2022-01-10 15:59:55,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:55,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:55,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:55,961 INFO L87 Difference]: Start difference. First operand 46705 states and 54601 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 15:59:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:57,356 INFO L93 Difference]: Finished difference Result 112742 states and 131714 transitions. [2022-01-10 15:59:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:57,356 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 15:59:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:57,447 INFO L225 Difference]: With dead ends: 112742 [2022-01-10 15:59:57,447 INFO L226 Difference]: Without dead ends: 66039 [2022-01-10 15:59:57,482 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 15:59:57,483 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 137 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:57,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 425 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 15:59:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66039 states. [2022-01-10 15:59:58,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66039 to 66025. [2022-01-10 15:59:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66025 states, 66024 states have (on average 1.1472797770507694) internal successors, (75748), 66024 states have internal predecessors, (75748), 0 states have call successors, (0), 0 states 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 15:59:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66025 states to 66025 states and 75748 transitions. [2022-01-10 15:59:58,462 INFO L78 Accepts]: Start accepts. Automaton has 66025 states and 75748 transitions. Word has length 248 [2022-01-10 15:59:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:58,462 INFO L470 AbstractCegarLoop]: Abstraction has 66025 states and 75748 transitions. [2022-01-10 15:59:58,463 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 15:59:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 66025 states and 75748 transitions. [2022-01-10 15:59:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-01-10 15:59:58,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:58,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:58,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 15:59:58,681 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:58,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:58,681 INFO L85 PathProgramCache]: Analyzing trace with hash 345177810, now seen corresponding path program 1 times [2022-01-10 15:59:58,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:58,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485732605] [2022-01-10 15:59:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:58,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:59:58,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:58,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485732605] [2022-01-10 15:59:58,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485732605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:58,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:58,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:58,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235216590] [2022-01-10 15:59:58,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:58,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 15:59:58,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 15:59:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 15:59:58,952 INFO L87 Difference]: Start difference. First operand 66025 states and 75748 transitions. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:00:01,012 INFO L93 Difference]: Finished difference Result 138613 states and 159389 transitions. [2022-01-10 16:00:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 16:00:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 264 [2022-01-10 16:00:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:00:01,111 INFO L225 Difference]: With dead ends: 138613 [2022-01-10 16:00:01,112 INFO L226 Difference]: Without dead ends: 72590 [2022-01-10 16:00:01,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 16:00:01,149 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 338 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 16:00:01,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 139 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 16:00:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72590 states. [2022-01-10 16:00:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72590 to 66025. [2022-01-10 16:00:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66025 states, 66024 states have (on average 1.1472797770507694) internal successors, (75748), 66024 states have internal predecessors, (75748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66025 states to 66025 states and 75748 transitions. [2022-01-10 16:00:02,053 INFO L78 Accepts]: Start accepts. Automaton has 66025 states and 75748 transitions. Word has length 264 [2022-01-10 16:00:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:00:02,054 INFO L470 AbstractCegarLoop]: Abstraction has 66025 states and 75748 transitions. [2022-01-10 16:00:02,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 66025 states and 75748 transitions. [2022-01-10 16:00:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-10 16:00:02,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:00:02,094 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:00:02,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 16:00:02,094 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:00:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:00:02,094 INFO L85 PathProgramCache]: Analyzing trace with hash 488643728, now seen corresponding path program 1 times [2022-01-10 16:00:02,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:00:02,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208453718] [2022-01-10 16:00:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:02,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:00:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-01-10 16:00:02,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:00:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208453718] [2022-01-10 16:00:02,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208453718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:00:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609482968] [2022-01-10 16:00:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:02,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:00:02,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:00:02,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 16:00:02,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 16:00:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:03,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 8199 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 16:00:03,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:00:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 16:00:03,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:00:03,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609482968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:00:03,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:00:03,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:00:03,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234183976] [2022-01-10 16:00:03,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:00:03,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:00:03,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:00:03,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:00:03,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:00:03,837 INFO L87 Difference]: Start difference. First operand 66025 states and 75748 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:00:05,307 INFO L93 Difference]: Finished difference Result 164236 states and 189575 transitions. [2022-01-10 16:00:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:00:05,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2022-01-10 16:00:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:00:05,452 INFO L225 Difference]: With dead ends: 164236 [2022-01-10 16:00:05,453 INFO L226 Difference]: Without dead ends: 98213 [2022-01-10 16:00:05,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:00:05,479 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 123 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:00:05,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 158 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:00:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98213 states. [2022-01-10 16:00:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98213 to 97777. [2022-01-10 16:00:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97777 states, 97776 states have (on average 1.1434401080019636) internal successors, (111801), 97776 states have internal predecessors, (111801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97777 states to 97777 states and 111801 transitions. [2022-01-10 16:00:07,012 INFO L78 Accepts]: Start accepts. Automaton has 97777 states and 111801 transitions. Word has length 269 [2022-01-10 16:00:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:00:07,013 INFO L470 AbstractCegarLoop]: Abstraction has 97777 states and 111801 transitions. [2022-01-10 16:00:07,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 97777 states and 111801 transitions. [2022-01-10 16:00:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-10 16:00:07,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:00:07,082 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:00:07,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 16:00:07,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-10 16:00:07,285 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:00:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:00:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1583721482, now seen corresponding path program 1 times [2022-01-10 16:00:07,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:00:07,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322238183] [2022-01-10 16:00:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:07,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:00:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-01-10 16:00:07,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:00:07,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322238183] [2022-01-10 16:00:07,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322238183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:00:07,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116747018] [2022-01-10 16:00:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:07,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:00:07,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:00:07,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 16:00:07,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 16:00:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 9458 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 16:00:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:00:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 16:00:09,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:00:09,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116747018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:00:09,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:00:09,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-01-10 16:00:09,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307555988] [2022-01-10 16:00:09,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:00:09,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 16:00:09,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:00:09,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 16:00:09,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 16:00:09,799 INFO L87 Difference]: Start difference. First operand 97777 states and 111801 transitions. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:00:12,131 INFO L93 Difference]: Finished difference Result 362764 states and 415321 transitions. [2022-01-10 16:00:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 16:00:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 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 309 [2022-01-10 16:00:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:00:12,606 INFO L225 Difference]: With dead ends: 362764 [2022-01-10 16:00:12,606 INFO L226 Difference]: Without dead ends: 264989 [2022-01-10 16:00:12,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 16:00:12,718 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 806 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 16:00:12,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 403 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 16:00:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264989 states. [2022-01-10 16:00:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264989 to 264928. [2022-01-10 16:00:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264928 states, 264927 states have (on average 1.1446285203093682) internal successors, (303243), 264927 states have internal predecessors, (303243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264928 states to 264928 states and 303243 transitions. [2022-01-10 16:00:17,170 INFO L78 Accepts]: Start accepts. Automaton has 264928 states and 303243 transitions. Word has length 309 [2022-01-10 16:00:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:00:17,170 INFO L470 AbstractCegarLoop]: Abstraction has 264928 states and 303243 transitions. [2022-01-10 16:00:17,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 264928 states and 303243 transitions. [2022-01-10 16:00:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-10 16:00:17,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:00:17,652 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:00:17,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 16:00:17,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:00:17,853 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:00:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:00:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 998622049, now seen corresponding path program 1 times [2022-01-10 16:00:17,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:00:17,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692116163] [2022-01-10 16:00:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:17,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:00:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 171 proven. 6 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-01-10 16:00:18,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:00:18,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692116163] [2022-01-10 16:00:18,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692116163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:00:18,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325712640] [2022-01-10 16:00:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:18,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:00:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:00:18,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 16:00:18,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 16:00:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 9362 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 16:00:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:00:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-01-10 16:00:19,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:00:19,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325712640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:00:19,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:00:19,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:00:19,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387292161] [2022-01-10 16:00:19,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:00:19,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:00:19,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:00:19,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:00:19,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:00:19,484 INFO L87 Difference]: Start difference. First operand 264928 states and 303243 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:00:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:00:22,451 INFO L93 Difference]: Finished difference Result 676412 states and 774855 transitions. [2022-01-10 16:00:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:00:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2022-01-10 16:00:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted.