/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 20:21:08,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 20:21:08,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 20:21:08,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 20:21:08,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 20:21:08,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 20:21:08,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 20:21:08,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 20:21:08,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 20:21:08,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 20:21:08,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 20:21:08,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 20:21:08,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 20:21:08,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 20:21:08,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 20:21:08,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 20:21:08,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 20:21:08,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 20:21:08,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 20:21:08,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 20:21:08,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 20:21:08,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 20:21:08,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 20:21:08,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 20:21:08,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 20:21:08,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 20:21:08,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 20:21:08,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 20:21:08,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 20:21:08,516 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 20:21:08,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 20:21:08,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 20:21:08,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 20:21:08,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 20:21:08,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 20:21:08,517 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 20:21:08,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 20:21:08,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 20:21:08,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 20:21:08,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 20:21:08,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 20:21:08,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 20:21:08,519 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 20:21:08,519 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 20:21:08,519 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 20:21:08,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 20:21:08,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 20:21:08,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 20:21:08,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 20:21:08,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 20:21:08,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:21:08,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 20:21:08,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 20:21:08,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 20:21:08,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 20:21:08,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 20:21:08,521 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 20:21:08,522 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 20:21:08,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 20:21:08,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 20:21:08,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 20:21:08,523 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 20:21:08,523 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 20:21:08,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 20:21:08,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 20:21:08,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 20:21:08,743 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 20:21:08,744 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 20:21:08,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-01-10 20:21:08,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c4b53a5/e0a7c74c715b4255afa90c13cab928b9/FLAG82e92e6c5 [2022-01-10 20:21:09,084 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 20:21:09,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-01-10 20:21:09,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c4b53a5/e0a7c74c715b4255afa90c13cab928b9/FLAG82e92e6c5 [2022-01-10 20:21:09,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c4b53a5/e0a7c74c715b4255afa90c13cab928b9 [2022-01-10 20:21:09,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 20:21:09,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 20:21:09,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 20:21:09,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 20:21:09,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 20:21:09,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7f05a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09, skipping insertion in model container [2022-01-10 20:21:09,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 20:21:09,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 20:21:09,755 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-01-10 20:21:09,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:21:09,784 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 20:21:09,793 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-01-10 20:21:09,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:21:09,813 INFO L208 MainTranslator]: Completed translation [2022-01-10 20:21:09,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09 WrapperNode [2022-01-10 20:21:09,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 20:21:09,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 20:21:09,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 20:21:09,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 20:21:09,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,841 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-01-10 20:21:09,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 20:21:09,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 20:21:09,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 20:21:09,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 20:21:09,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 20:21:09,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 20:21:09,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 20:21:09,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 20:21:09,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (1/1) ... [2022-01-10 20:21:09,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:21:09,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:09,893 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 20:21:09,912 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 20:21:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 20:21:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 20:21:09,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 20:21:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 20:21:09,972 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 20:21:09,973 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 20:21:10,103 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 20:21:10,106 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 20:21:10,107 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 20:21:10,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:21:10 BoogieIcfgContainer [2022-01-10 20:21:10,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 20:21:10,108 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 20:21:10,108 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 20:21:10,109 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 20:21:10,111 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:21:10" (1/1) ... [2022-01-10 20:21:10,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:21:10 BasicIcfg [2022-01-10 20:21:10,145 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 20:21:10,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 20:21:10,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 20:21:10,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 20:21:10,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:21:09" (1/4) ... [2022-01-10 20:21:10,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d02928a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:21:10, skipping insertion in model container [2022-01-10 20:21:10,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:09" (2/4) ... [2022-01-10 20:21:10,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d02928a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:21:10, skipping insertion in model container [2022-01-10 20:21:10,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:21:10" (3/4) ... [2022-01-10 20:21:10,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d02928a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:21:10, skipping insertion in model container [2022-01-10 20:21:10,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:21:10" (4/4) ... [2022-01-10 20:21:10,150 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.cTransformedIcfg [2022-01-10 20:21:10,153 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 20:21:10,153 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 20:21:10,187 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 20:21:10,200 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 20:21:10,200 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 20:21:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 20:21:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 20:21:10,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:10,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:10,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:10,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1217693781, now seen corresponding path program 1 times [2022-01-10 20:21:10,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:10,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813226401] [2022-01-10 20:21:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:10,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:21:10,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813226401] [2022-01-10 20:21:10,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813226401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:21:10,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:21:10,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 20:21:10,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236808673] [2022-01-10 20:21:10,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:21:10,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 20:21:10,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:10,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 20:21:10,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:21:10,358 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 20:21:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:10,368 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-01-10 20:21:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 20:21:10,369 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-01-10 20:21:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:10,374 INFO L225 Difference]: With dead ends: 29 [2022-01-10 20:21:10,374 INFO L226 Difference]: Without dead ends: 12 [2022-01-10 20:21:10,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:21:10,382 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:10,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-10 20:21:10,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-10 20:21:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 20:21:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-01-10 20:21:10,410 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2022-01-10 20:21:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:10,411 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-01-10 20:21:10,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 20:21:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-01-10 20:21:10,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 20:21:10,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:10,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:10,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 20:21:10,413 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:10,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:10,419 INFO L85 PathProgramCache]: Analyzing trace with hash 327325462, now seen corresponding path program 1 times [2022-01-10 20:21:10,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:10,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192431655] [2022-01-10 20:21:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:10,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:10,478 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 20:21:10,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192431655] [2022-01-10 20:21:10,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192431655] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:21:10,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:21:10,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 20:21:10,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933713995] [2022-01-10 20:21:10,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:21:10,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:21:10,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:21:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:21:10,480 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 20:21:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:10,513 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-01-10 20:21:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:21:10,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-01-10 20:21:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:10,514 INFO L225 Difference]: With dead ends: 27 [2022-01-10 20:21:10,514 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 20:21:10,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:21:10,515 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:10,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 20:21:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 20:21:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 20:21:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2022-01-10 20:21:10,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2022-01-10 20:21:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:10,519 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2022-01-10 20:21:10,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 20:21:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2022-01-10 20:21:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 20:21:10,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:10,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:10,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 20:21:10,520 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1558017743, now seen corresponding path program 1 times [2022-01-10 20:21:10,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:10,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038619995] [2022-01-10 20:21:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:10,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:21:10,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038619995] [2022-01-10 20:21:10,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038619995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:21:10,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:21:10,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:21:10,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123166011] [2022-01-10 20:21:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:21:10,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:21:10,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:21:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:21:10,557 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 20:21:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:10,567 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2022-01-10 20:21:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:21:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-01-10 20:21:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:10,567 INFO L225 Difference]: With dead ends: 28 [2022-01-10 20:21:10,568 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 20:21:10,568 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 20:21:10,569 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:10,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 20:21:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 20:21:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 20:21:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2022-01-10 20:21:10,572 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2022-01-10 20:21:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:10,572 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2022-01-10 20:21:10,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 20:21:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2022-01-10 20:21:10,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 20:21:10,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:10,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:10,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 20:21:10,573 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1582952810, now seen corresponding path program 1 times [2022-01-10 20:21:10,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:10,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947523896] [2022-01-10 20:21:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:10,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:21:10,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:10,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947523896] [2022-01-10 20:21:10,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947523896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:21:10,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:21:10,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:21:10,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253024486] [2022-01-10 20:21:10,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:21:10,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:21:10,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:10,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:21:10,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:21:10,605 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 20:21:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:10,624 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2022-01-10 20:21:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:21:10,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-01-10 20:21:10,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:10,625 INFO L225 Difference]: With dead ends: 37 [2022-01-10 20:21:10,625 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 20:21:10,625 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 20:21:10,626 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:10,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 20:21:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 20:21:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 20:21:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-10 20:21:10,630 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 12 [2022-01-10 20:21:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:10,630 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-10 20:21:10,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 20:21:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-10 20:21:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 20:21:10,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:10,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:10,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 20:21:10,631 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash -143270666, now seen corresponding path program 1 times [2022-01-10 20:21:10,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:10,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406104779] [2022-01-10 20:21:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:10,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:10,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406104779] [2022-01-10 20:21:10,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406104779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:21:10,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:21:10,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 20:21:10,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84146485] [2022-01-10 20:21:10,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:21:10,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:21:10,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:21:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:21:10,691 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states 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 20:21:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:10,712 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-01-10 20:21:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:21:10,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-01-10 20:21:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:10,712 INFO L225 Difference]: With dead ends: 34 [2022-01-10 20:21:10,713 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 20:21:10,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 20:21:10,714 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:10,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 20:21:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 20:21:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 20:21:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2022-01-10 20:21:10,717 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2022-01-10 20:21:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:10,717 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2022-01-10 20:21:10,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states 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 20:21:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2022-01-10 20:21:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 20:21:10,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:10,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:10,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 20:21:10,718 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1935206070, now seen corresponding path program 1 times [2022-01-10 20:21:10,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212245538] [2022-01-10 20:21:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:10,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:10,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:10,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212245538] [2022-01-10 20:21:10,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212245538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:21:10,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:21:10,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 20:21:10,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183854798] [2022-01-10 20:21:10,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:21:10,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:21:10,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:10,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:21:10,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:21:10,758 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 20:21:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:10,784 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2022-01-10 20:21:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 20:21:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-01-10 20:21:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:10,791 INFO L225 Difference]: With dead ends: 29 [2022-01-10 20:21:10,791 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 20:21:10,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:21:10,792 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:10,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 20:21:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-10 20:21:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 20:21:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-01-10 20:21:10,796 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2022-01-10 20:21:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:10,796 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-01-10 20:21:10,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 20:21:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-01-10 20:21:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 20:21:10,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:10,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:10,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 20:21:10,797 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:10,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2099032214, now seen corresponding path program 1 times [2022-01-10 20:21:10,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:10,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828860130] [2022-01-10 20:21:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:10,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:10,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:10,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828860130] [2022-01-10 20:21:10,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828860130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:10,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566486838] [2022-01-10 20:21:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:10,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:10,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:10,855 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 20:21:10,856 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 20:21:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 20:21:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:11,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:11,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566486838] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:11,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 20:21:11,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2022-01-10 20:21:11,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930940785] [2022-01-10 20:21:11,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:21:11,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:21:11,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:21:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:21:11,050 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 20:21:11,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:11,063 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-01-10 20:21:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:21:11,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-01-10 20:21:11,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:11,063 INFO L225 Difference]: With dead ends: 24 [2022-01-10 20:21:11,063 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 20:21:11,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:21:11,064 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:11,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 20:21:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 20:21:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 20:21:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-01-10 20:21:11,067 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2022-01-10 20:21:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:11,067 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-01-10 20:21:11,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 20:21:11,068 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-01-10 20:21:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 20:21:11,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:11,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:11,089 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 20:21:11,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:11,287 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:11,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1843136726, now seen corresponding path program 1 times [2022-01-10 20:21:11,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:11,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061421920] [2022-01-10 20:21:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:11,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:11,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061421920] [2022-01-10 20:21:11,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061421920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001883680] [2022-01-10 20:21:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:11,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:11,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:11,358 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 20:21:11,360 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 20:21:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 20:21:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:11,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:11,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001883680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:11,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:11,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-10 20:21:11,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132145700] [2022-01-10 20:21:11,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:11,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:21:11,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:11,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:21:11,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:21:11,506 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 20:21:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:11,534 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-01-10 20:21:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:21:11,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 20:21:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:11,536 INFO L225 Difference]: With dead ends: 27 [2022-01-10 20:21:11,536 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 20:21:11,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:21:11,539 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:11,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 20:21:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 20:21:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 20:21:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-01-10 20:21:11,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 15 [2022-01-10 20:21:11,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:11,545 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-01-10 20:21:11,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 20:21:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-01-10 20:21:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 20:21:11,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:11,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:11,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:11,761 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,SelfDestructingSolverStorable7 [2022-01-10 20:21:11,761 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:11,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1868071793, now seen corresponding path program 1 times [2022-01-10 20:21:11,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:11,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139638343] [2022-01-10 20:21:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:11,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:11,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139638343] [2022-01-10 20:21:11,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139638343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288922454] [2022-01-10 20:21:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:11,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:11,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:11,840 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 20:21:11,841 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 20:21:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:11,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 20:21:11,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:11,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:12,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288922454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:12,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:12,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-10 20:21:12,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623702948] [2022-01-10 20:21:12,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:12,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:21:12,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:12,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:21:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:21:12,035 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 20:21:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:12,060 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2022-01-10 20:21:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:21:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 20:21:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:12,063 INFO L225 Difference]: With dead ends: 33 [2022-01-10 20:21:12,063 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 20:21:12,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:21:12,066 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:12,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:12,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 20:21:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-01-10 20:21:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 20:21:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-01-10 20:21:12,079 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2022-01-10 20:21:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:12,079 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-01-10 20:21:12,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 20:21:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-01-10 20:21:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 20:21:12,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:12,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:12,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:12,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:12,293 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2076513748, now seen corresponding path program 1 times [2022-01-10 20:21:12,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:12,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313004460] [2022-01-10 20:21:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:12,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:12,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:12,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313004460] [2022-01-10 20:21:12,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313004460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:12,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961598562] [2022-01-10 20:21:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:12,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:12,396 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 20:21:12,397 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 20:21:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 20:21:12,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:12,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:12,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961598562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:12,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:12,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 15 [2022-01-10 20:21:12,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572038963] [2022-01-10 20:21:12,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:12,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 20:21:12,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:12,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 20:21:12,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-01-10 20:21:12,884 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 20:21:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:13,134 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2022-01-10 20:21:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 20:21:13,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 16 [2022-01-10 20:21:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:13,138 INFO L225 Difference]: With dead ends: 65 [2022-01-10 20:21:13,138 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 20:21:13,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2022-01-10 20:21:13,139 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:13,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 50 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:21:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 20:21:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2022-01-10 20:21:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 20:21:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2022-01-10 20:21:13,144 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 16 [2022-01-10 20:21:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:13,144 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2022-01-10 20:21:13,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 20:21:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2022-01-10 20:21:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 20:21:13,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:13,144 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:13,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 20:21:13,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:13,377 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1287320886, now seen corresponding path program 2 times [2022-01-10 20:21:13,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:13,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799951854] [2022-01-10 20:21:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:13,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:13,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:13,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799951854] [2022-01-10 20:21:13,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799951854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:13,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026844181] [2022-01-10 20:21:13,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:21:13,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:13,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:13,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:21:13,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 20:21:13,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:21:13,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 20:21:13,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:13,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 20:21:13,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026844181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:13,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:13,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-01-10 20:21:13,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958598482] [2022-01-10 20:21:13,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:13,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 20:21:13,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 20:21:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-10 20:21:13,693 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 20:21:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:14,008 INFO L93 Difference]: Finished difference Result 83 states and 127 transitions. [2022-01-10 20:21:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 20:21:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 16 [2022-01-10 20:21:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:14,009 INFO L225 Difference]: With dead ends: 83 [2022-01-10 20:21:14,009 INFO L226 Difference]: Without dead ends: 75 [2022-01-10 20:21:14,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2022-01-10 20:21:14,010 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:14,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 43 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:21:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-10 20:21:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2022-01-10 20:21:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.490566037735849) internal successors, (79), 53 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 20:21:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 79 transitions. [2022-01-10 20:21:14,017 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 79 transitions. Word has length 16 [2022-01-10 20:21:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:14,017 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 79 transitions. [2022-01-10 20:21:14,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 20:21:14,017 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 79 transitions. [2022-01-10 20:21:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 20:21:14,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:14,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:14,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:14,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 20:21:14,233 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1728305494, now seen corresponding path program 2 times [2022-01-10 20:21:14,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:14,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003519952] [2022-01-10 20:21:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:14,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 20:21:14,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:14,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003519952] [2022-01-10 20:21:14,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003519952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:14,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704615601] [2022-01-10 20:21:14,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:21:14,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:14,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:14,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:21:14,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 20:21:14,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:21:14,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-10 20:21:14,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 20:21:14,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 20:21:14,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704615601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:14,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:14,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 17 [2022-01-10 20:21:14,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608693384] [2022-01-10 20:21:14,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:14,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 20:21:14,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:14,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 20:21:14,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-10 20:21:14,745 INFO L87 Difference]: Start difference. First operand 54 states and 79 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 20:21:15,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:15,321 INFO L93 Difference]: Finished difference Result 128 states and 189 transitions. [2022-01-10 20:21:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-10 20:21:15,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 17 [2022-01-10 20:21:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:15,322 INFO L225 Difference]: With dead ends: 128 [2022-01-10 20:21:15,322 INFO L226 Difference]: Without dead ends: 109 [2022-01-10 20:21:15,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1138, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 20:21:15,323 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:15,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 132 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 209 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-01-10 20:21:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-10 20:21:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 64. [2022-01-10 20:21:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.492063492063492) internal successors, (94), 63 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 20:21:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 94 transitions. [2022-01-10 20:21:15,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 94 transitions. Word has length 17 [2022-01-10 20:21:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:15,332 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 94 transitions. [2022-01-10 20:21:15,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 20:21:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 94 transitions. [2022-01-10 20:21:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 20:21:15,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:15,333 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:15,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:15,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:15,552 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash -51720239, now seen corresponding path program 2 times [2022-01-10 20:21:15,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:15,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316846822] [2022-01-10 20:21:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:15,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:15,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:15,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316846822] [2022-01-10 20:21:15,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316846822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:15,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673904599] [2022-01-10 20:21:15,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:21:15,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:15,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:15,612 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:21:15,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 20:21:15,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:21:15,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 20:21:15,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:15,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:16,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673904599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:16,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:16,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 18 [2022-01-10 20:21:16,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151515913] [2022-01-10 20:21:16,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:16,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 20:21:16,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:16,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 20:21:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-10 20:21:16,728 INFO L87 Difference]: Start difference. First operand 64 states and 94 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 20:21:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:19,211 INFO L93 Difference]: Finished difference Result 144 states and 191 transitions. [2022-01-10 20:21:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 20:21:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 17 [2022-01-10 20:21:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:19,212 INFO L225 Difference]: With dead ends: 144 [2022-01-10 20:21:19,213 INFO L226 Difference]: Without dead ends: 122 [2022-01-10 20:21:19,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=261, Invalid=929, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 20:21:19,214 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 92 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:19,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 136 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 132 Invalid, 0 Unknown, 34 Unchecked, 0.7s Time] [2022-01-10 20:21:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-10 20:21:19,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 56. [2022-01-10 20:21:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 55 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 20:21:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 80 transitions. [2022-01-10 20:21:19,222 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 80 transitions. Word has length 17 [2022-01-10 20:21:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:19,222 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 80 transitions. [2022-01-10 20:21:19,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 20:21:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 80 transitions. [2022-01-10 20:21:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 20:21:19,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:19,223 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:19,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:19,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:19,437 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash 721266838, now seen corresponding path program 3 times [2022-01-10 20:21:19,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:19,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808952950] [2022-01-10 20:21:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:19,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:19,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:19,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808952950] [2022-01-10 20:21:19,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808952950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:19,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948922744] [2022-01-10 20:21:19,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:21:19,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:19,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:19,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:21:19,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 20:21:19,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 20:21:19,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:19,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 20:21:19,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:19,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 20:21:20,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948922744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:20,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:20,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 7] total 18 [2022-01-10 20:21:20,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274104551] [2022-01-10 20:21:20,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:20,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 20:21:20,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 20:21:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-10 20:21:20,040 INFO L87 Difference]: Start difference. First operand 56 states and 80 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 20:21:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:20,381 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2022-01-10 20:21:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 20:21:20,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 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 17 [2022-01-10 20:21:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:20,382 INFO L225 Difference]: With dead ends: 101 [2022-01-10 20:21:20,382 INFO L226 Difference]: Without dead ends: 81 [2022-01-10 20:21:20,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-01-10 20:21:20,383 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 82 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:20,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 118 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-01-10 20:21:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-10 20:21:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-01-10 20:21:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 53 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 20:21:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2022-01-10 20:21:20,389 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 17 [2022-01-10 20:21:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:20,389 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2022-01-10 20:21:20,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 20:21:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2022-01-10 20:21:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 20:21:20,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:20,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:20,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:20,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-10 20:21:20,599 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash -295359215, now seen corresponding path program 3 times [2022-01-10 20:21:20,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:20,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452175165] [2022-01-10 20:21:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:20,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 20:21:20,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:20,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452175165] [2022-01-10 20:21:20,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452175165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:20,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445559604] [2022-01-10 20:21:20,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:21:20,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:20,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:20,672 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:21:20,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 20:21:20,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 20:21:20,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-10 20:21:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 20:21:21,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 20:21:23,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445559604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:23,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:23,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 10] total 21 [2022-01-10 20:21:23,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066528572] [2022-01-10 20:21:23,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:23,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 20:21:23,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:23,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 20:21:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-01-10 20:21:23,273 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 20:21:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:24,825 INFO L93 Difference]: Finished difference Result 91 states and 132 transitions. [2022-01-10 20:21:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 20:21:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 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 19 [2022-01-10 20:21:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:24,826 INFO L225 Difference]: With dead ends: 91 [2022-01-10 20:21:24,826 INFO L226 Difference]: Without dead ends: 73 [2022-01-10 20:21:24,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-01-10 20:21:24,827 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:24,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-01-10 20:21:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-10 20:21:24,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2022-01-10 20:21:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 20:21:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 80 transitions. [2022-01-10 20:21:24,832 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 80 transitions. Word has length 19 [2022-01-10 20:21:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:24,832 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 80 transitions. [2022-01-10 20:21:24,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 20:21:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 80 transitions. [2022-01-10 20:21:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 20:21:24,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:24,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:24,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:25,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-10 20:21:25,048 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1723206762, now seen corresponding path program 4 times [2022-01-10 20:21:25,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535638082] [2022-01-10 20:21:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:25,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 20:21:25,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535638082] [2022-01-10 20:21:25,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535638082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374295800] [2022-01-10 20:21:25,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 20:21:25,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:25,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:25,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:21:25,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 20:21:25,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 20:21:25,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 20:21:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 20:21:25,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 20:21:25,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374295800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:25,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:25,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 7] total 18 [2022-01-10 20:21:25,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605887847] [2022-01-10 20:21:25,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:25,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 20:21:25,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:25,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 20:21:25,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-10 20:21:25,607 INFO L87 Difference]: Start difference. First operand 53 states and 80 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 20:21:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:26,466 INFO L93 Difference]: Finished difference Result 131 states and 186 transitions. [2022-01-10 20:21:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 20:21:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 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 19 [2022-01-10 20:21:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:26,467 INFO L225 Difference]: With dead ends: 131 [2022-01-10 20:21:26,467 INFO L226 Difference]: Without dead ends: 111 [2022-01-10 20:21:26,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 20:21:26,468 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:26,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 88 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 171 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2022-01-10 20:21:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-10 20:21:26,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 66. [2022-01-10 20:21:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 65 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 20:21:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2022-01-10 20:21:26,489 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 19 [2022-01-10 20:21:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:26,490 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2022-01-10 20:21:26,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 20:21:26,490 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2022-01-10 20:21:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 20:21:26,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:26,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:26,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:26,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-10 20:21:26,706 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:26,707 INFO L85 PathProgramCache]: Analyzing trace with hash -934807338, now seen corresponding path program 5 times [2022-01-10 20:21:26,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:26,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164011200] [2022-01-10 20:21:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:26,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 20:21:26,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:26,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164011200] [2022-01-10 20:21:26,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164011200] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:26,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666439055] [2022-01-10 20:21:26,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 20:21:26,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:26,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:26,779 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:21:26,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-10 20:21:26,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:21:26,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:26,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-10 20:21:26,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:27,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 20:21:49,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666439055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:49,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:49,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16, 10] total 25 [2022-01-10 20:21:49,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866929396] [2022-01-10 20:21:49,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:49,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 20:21:49,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:49,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 20:21:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=487, Unknown=6, NotChecked=0, Total=600 [2022-01-10 20:21:49,191 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 20:21:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:58,341 INFO L93 Difference]: Finished difference Result 93 states and 138 transitions. [2022-01-10 20:21:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 20:21:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 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 21 [2022-01-10 20:21:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:58,342 INFO L225 Difference]: With dead ends: 93 [2022-01-10 20:21:58,342 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 20:21:58,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=278, Invalid=1436, Unknown=8, NotChecked=0, Total=1722 [2022-01-10 20:21:58,343 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:58,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 137 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-01-10 20:21:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 20:21:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2022-01-10 20:21:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.5128205128205128) internal successors, (118), 78 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:21:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2022-01-10 20:21:58,352 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 21 [2022-01-10 20:21:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:58,352 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2022-01-10 20:21:58,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 20:21:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2022-01-10 20:21:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 20:21:58,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:58,354 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:58,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:58,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-10 20:21:58,569 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash 71176906, now seen corresponding path program 3 times [2022-01-10 20:21:58,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:58,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624009635] [2022-01-10 20:21:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:58,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 20:21:58,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:58,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624009635] [2022-01-10 20:21:58,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624009635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:58,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207706733] [2022-01-10 20:21:58,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:21:58,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:58,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:58,660 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:21:58,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-10 20:21:58,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 20:21:58,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:58,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 20:21:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 20:21:58,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 20:21:59,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207706733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:59,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:59,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2022-01-10 20:21:59,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029293059] [2022-01-10 20:21:59,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:59,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 20:21:59,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 20:21:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-10 20:21:59,093 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 20:22:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:22:00,379 INFO L93 Difference]: Finished difference Result 137 states and 206 transitions. [2022-01-10 20:22:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 20:22:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 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 22 [2022-01-10 20:22:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:22:00,380 INFO L225 Difference]: With dead ends: 137 [2022-01-10 20:22:00,380 INFO L226 Difference]: Without dead ends: 118 [2022-01-10 20:22:00,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 20:22:00,381 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 20:22:00,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 126 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 20:22:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-10 20:22:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2022-01-10 20:22:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.425) internal successors, (114), 80 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:22:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2022-01-10 20:22:00,407 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 22 [2022-01-10 20:22:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:22:00,407 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2022-01-10 20:22:00,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 20:22:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2022-01-10 20:22:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 20:22:00,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:22:00,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:22:00,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-10 20:22:00,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-10 20:22:00,623 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:22:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:22:00,623 INFO L85 PathProgramCache]: Analyzing trace with hash -413296266, now seen corresponding path program 6 times [2022-01-10 20:22:00,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:22:00,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491653441] [2022-01-10 20:22:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:22:00,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:22:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:22:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 20:22:00,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:22:00,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491653441] [2022-01-10 20:22:00,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491653441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:22:00,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983287409] [2022-01-10 20:22:00,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 20:22:00,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:22:00,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:22:00,721 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:22:00,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-10 20:22:00,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-10 20:22:00,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:22:00,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 20:22:00,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:22:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 20:22:01,563 INFO L328 TraceCheckSpWp]: Computing backward predicates...