./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/locks/test_locks_11.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a93221bc263791497331acd2a7a0150037c621aa 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 20:13:56,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 20:13:56,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 20:13:56,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 20:13:56,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 20:13:56,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 20:13:56,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 20:13:56,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 20:13:56,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 20:13:56,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 20:13:56,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 20:13:56,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 20:13:56,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 20:13:56,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 20:13:56,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 20:13:56,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 20:13:56,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 20:13:56,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 20:13:56,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 20:13:56,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 20:13:56,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 20:13:56,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 20:13:56,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 20:13:56,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 20:13:56,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 20:13:56,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 20:13:56,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 20:13:56,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 20:13:56,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 20:13:56,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 20:13:56,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 20:13:56,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 20:13:56,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 20:13:56,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 20:13:56,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 20:13:56,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 20:13:56,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 20:13:56,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 20:13:56,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 20:13:56,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 20:13:56,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 20:13:56,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 20:13:57,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 20:13:57,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 20:13:57,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 20:13:57,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 20:13:57,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 20:13:57,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 20:13:57,008 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 20:13:57,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 20:13:57,009 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 20:13:57,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 20:13:57,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 20:13:57,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 20:13:57,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 20:13:57,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 20:13:57,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 20:13:57,011 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 20:13:57,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 20:13:57,011 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 20:13:57,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 20:13:57,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 20:13:57,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 20:13:57,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 20:13:57,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:13:57,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 20:13:57,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 20:13:57,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 20:13:57,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 20:13:57,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 20:13:57,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 20:13:57,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 20:13:57,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93221bc263791497331acd2a7a0150037c621aa [2021-08-25 20:13:57,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 20:13:57,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 20:13:57,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 20:13:57,265 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 20:13:57,266 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 20:13:57,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_11.c [2021-08-25 20:13:57,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c947f3c18/d9b9d66097a645738497495d9e9852fe/FLAG0c0c10e3e [2021-08-25 20:13:57,755 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 20:13:57,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_11.c [2021-08-25 20:13:57,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c947f3c18/d9b9d66097a645738497495d9e9852fe/FLAG0c0c10e3e [2021-08-25 20:13:57,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c947f3c18/d9b9d66097a645738497495d9e9852fe [2021-08-25 20:13:57,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 20:13:57,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 20:13:57,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 20:13:57,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 20:13:57,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 20:13:57,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:13:57" (1/1) ... [2021-08-25 20:13:57,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9a8385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:57, skipping insertion in model container [2021-08-25 20:13:57,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:13:57" (1/1) ... [2021-08-25 20:13:57,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 20:13:57,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 20:13:58,013 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_11.c[4246,4259] [2021-08-25 20:13:58,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:13:58,021 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 20:13:58,035 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_11.c[4246,4259] [2021-08-25 20:13:58,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:13:58,044 INFO L208 MainTranslator]: Completed translation [2021-08-25 20:13:58,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58 WrapperNode [2021-08-25 20:13:58,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 20:13:58,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 20:13:58,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 20:13:58,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 20:13:58,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 20:13:58,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 20:13:58,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 20:13:58,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 20:13:58,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 20:13:58,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 20:13:58,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 20:13:58,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 20:13:58,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:13:58,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:58,139 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) [2021-08-25 20:13:58,144 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 [2021-08-25 20:13:58,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 20:13:58,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 20:13:58,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 20:13:58,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 20:13:58,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 20:13:58,517 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-25 20:13:58,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:13:58 BoogieIcfgContainer [2021-08-25 20:13:58,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 20:13:58,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 20:13:58,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 20:13:58,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 20:13:58,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 08:13:57" (1/3) ... [2021-08-25 20:13:58,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7763c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:13:58, skipping insertion in model container [2021-08-25 20:13:58,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (2/3) ... [2021-08-25 20:13:58,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7763c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:13:58, skipping insertion in model container [2021-08-25 20:13:58,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:13:58" (3/3) ... [2021-08-25 20:13:58,529 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2021-08-25 20:13:58,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 20:13:58,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 20:13:58,581 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 20:13:58,587 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-25 20:13:58,587 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 20:13:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 20:13:58,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:58,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:58,602 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash 458919617, now seen corresponding path program 1 times [2021-08-25 20:13:58,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:58,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197233453] [2021-08-25 20:13:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:58,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:58,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:58,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197233453] [2021-08-25 20:13:58,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197233453] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:58,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:58,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:58,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65601291] [2021-08-25 20:13:58,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:58,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:58,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:58,752 INFO L87 Difference]: Start difference. First operand has 43 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:58,777 INFO L93 Difference]: Finished difference Result 89 states and 157 transitions. [2021-08-25 20:13:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:58,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-08-25 20:13:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:58,784 INFO L225 Difference]: With dead ends: 89 [2021-08-25 20:13:58,784 INFO L226 Difference]: Without dead ends: 75 [2021-08-25 20:13:58,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-25 20:13:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 51. [2021-08-25 20:13:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.88) internal successors, (94), 50 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) [2021-08-25 20:13:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 94 transitions. [2021-08-25 20:13:58,809 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 94 transitions. Word has length 18 [2021-08-25 20:13:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:58,809 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 94 transitions. [2021-08-25 20:13:58,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 94 transitions. [2021-08-25 20:13:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 20:13:58,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:58,810 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:58,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 20:13:58,811 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:58,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:58,811 INFO L82 PathProgramCache]: Analyzing trace with hash -552197633, now seen corresponding path program 1 times [2021-08-25 20:13:58,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:58,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971552663] [2021-08-25 20:13:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:58,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:58,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:58,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971552663] [2021-08-25 20:13:58,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971552663] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:58,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:58,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:58,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57267313] [2021-08-25 20:13:58,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:58,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:58,881 INFO L87 Difference]: Start difference. First operand 51 states and 94 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:58,896 INFO L93 Difference]: Finished difference Result 124 states and 229 transitions. [2021-08-25 20:13:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-08-25 20:13:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:58,898 INFO L225 Difference]: With dead ends: 124 [2021-08-25 20:13:58,898 INFO L226 Difference]: Without dead ends: 75 [2021-08-25 20:13:58,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-25 20:13:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-08-25 20:13:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.8611111111111112) internal successors, (134), 72 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 134 transitions. [2021-08-25 20:13:58,905 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 134 transitions. Word has length 18 [2021-08-25 20:13:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:58,905 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 134 transitions. [2021-08-25 20:13:58,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 134 transitions. [2021-08-25 20:13:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 20:13:58,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:58,906 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:58,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 20:13:58,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:58,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:58,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1341819263, now seen corresponding path program 1 times [2021-08-25 20:13:58,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:58,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884706367] [2021-08-25 20:13:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:58,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:58,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:58,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884706367] [2021-08-25 20:13:58,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884706367] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:58,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:58,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:58,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948182033] [2021-08-25 20:13:58,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:58,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:58,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:58,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:58,942 INFO L87 Difference]: Start difference. First operand 73 states and 134 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:58,953 INFO L93 Difference]: Finished difference Result 114 states and 204 transitions. [2021-08-25 20:13:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-08-25 20:13:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:58,954 INFO L225 Difference]: With dead ends: 114 [2021-08-25 20:13:58,955 INFO L226 Difference]: Without dead ends: 78 [2021-08-25 20:13:58,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-25 20:13:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-08-25 20:13:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.8133333333333332) internal successors, (136), 75 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 136 transitions. [2021-08-25 20:13:58,961 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 136 transitions. Word has length 19 [2021-08-25 20:13:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:58,961 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 136 transitions. [2021-08-25 20:13:58,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 136 transitions. [2021-08-25 20:13:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 20:13:58,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:58,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:58,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-25 20:13:58,962 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:58,963 INFO L82 PathProgramCache]: Analyzing trace with hash 61955585, now seen corresponding path program 1 times [2021-08-25 20:13:58,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:58,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593635137] [2021-08-25 20:13:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:58,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:58,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:58,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593635137] [2021-08-25 20:13:58,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593635137] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:58,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:58,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:58,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997539496] [2021-08-25 20:13:58,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:58,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:58,995 INFO L87 Difference]: Start difference. First operand 76 states and 136 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,006 INFO L93 Difference]: Finished difference Result 145 states and 261 transitions. [2021-08-25 20:13:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-08-25 20:13:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,007 INFO L225 Difference]: With dead ends: 145 [2021-08-25 20:13:59,007 INFO L226 Difference]: Without dead ends: 143 [2021-08-25 20:13:59,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-25 20:13:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2021-08-25 20:13:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.81) internal successors, (181), 100 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 181 transitions. [2021-08-25 20:13:59,014 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 181 transitions. Word has length 19 [2021-08-25 20:13:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,014 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 181 transitions. [2021-08-25 20:13:59,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 181 transitions. [2021-08-25 20:13:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 20:13:59,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,015 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-25 20:13:59,016 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,016 INFO L82 PathProgramCache]: Analyzing trace with hash -949161665, now seen corresponding path program 1 times [2021-08-25 20:13:59,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683949122] [2021-08-25 20:13:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683949122] [2021-08-25 20:13:59,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683949122] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685093430] [2021-08-25 20:13:59,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,054 INFO L87 Difference]: Start difference. First operand 101 states and 181 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,065 INFO L93 Difference]: Finished difference Result 241 states and 435 transitions. [2021-08-25 20:13:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-08-25 20:13:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,067 INFO L225 Difference]: With dead ends: 241 [2021-08-25 20:13:59,067 INFO L226 Difference]: Without dead ends: 145 [2021-08-25 20:13:59,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-25 20:13:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-08-25 20:13:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.795774647887324) internal successors, (255), 142 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 255 transitions. [2021-08-25 20:13:59,074 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 255 transitions. Word has length 19 [2021-08-25 20:13:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,074 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 255 transitions. [2021-08-25 20:13:59,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,074 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 255 transitions. [2021-08-25 20:13:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 20:13:59,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-25 20:13:59,075 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1920836500, now seen corresponding path program 1 times [2021-08-25 20:13:59,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520113046] [2021-08-25 20:13:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520113046] [2021-08-25 20:13:59,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520113046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292938766] [2021-08-25 20:13:59,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,103 INFO L87 Difference]: Start difference. First operand 143 states and 255 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,112 INFO L93 Difference]: Finished difference Result 216 states and 382 transitions. [2021-08-25 20:13:59,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-08-25 20:13:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,113 INFO L225 Difference]: With dead ends: 216 [2021-08-25 20:13:59,113 INFO L226 Difference]: Without dead ends: 147 [2021-08-25 20:13:59,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-25 20:13:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2021-08-25 20:13:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7708333333333333) internal successors, (255), 144 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 255 transitions. [2021-08-25 20:13:59,119 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 255 transitions. Word has length 20 [2021-08-25 20:13:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,119 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 255 transitions. [2021-08-25 20:13:59,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 255 transitions. [2021-08-25 20:13:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 20:13:59,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-25 20:13:59,120 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash 640972822, now seen corresponding path program 1 times [2021-08-25 20:13:59,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029398393] [2021-08-25 20:13:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029398393] [2021-08-25 20:13:59,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029398393] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503490779] [2021-08-25 20:13:59,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,146 INFO L87 Difference]: Start difference. First operand 145 states and 255 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,157 INFO L93 Difference]: Finished difference Result 417 states and 737 transitions. [2021-08-25 20:13:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-08-25 20:13:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,159 INFO L225 Difference]: With dead ends: 417 [2021-08-25 20:13:59,159 INFO L226 Difference]: Without dead ends: 279 [2021-08-25 20:13:59,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-25 20:13:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2021-08-25 20:13:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.75) internal successors, (483), 276 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 483 transitions. [2021-08-25 20:13:59,176 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 483 transitions. Word has length 20 [2021-08-25 20:13:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,176 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 483 transitions. [2021-08-25 20:13:59,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 483 transitions. [2021-08-25 20:13:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 20:13:59,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,177 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-25 20:13:59,178 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1652090072, now seen corresponding path program 1 times [2021-08-25 20:13:59,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132170275] [2021-08-25 20:13:59,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132170275] [2021-08-25 20:13:59,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132170275] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865303546] [2021-08-25 20:13:59,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,203 INFO L87 Difference]: Start difference. First operand 277 states and 483 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,213 INFO L93 Difference]: Finished difference Result 353 states and 621 transitions. [2021-08-25 20:13:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-08-25 20:13:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,215 INFO L225 Difference]: With dead ends: 353 [2021-08-25 20:13:59,215 INFO L226 Difference]: Without dead ends: 351 [2021-08-25 20:13:59,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-25 20:13:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 277. [2021-08-25 20:13:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.7355072463768115) internal successors, (479), 276 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 479 transitions. [2021-08-25 20:13:59,224 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 479 transitions. Word has length 20 [2021-08-25 20:13:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,224 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 479 transitions. [2021-08-25 20:13:59,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 479 transitions. [2021-08-25 20:13:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 20:13:59,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,226 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-25 20:13:59,226 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1604465292, now seen corresponding path program 1 times [2021-08-25 20:13:59,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512489840] [2021-08-25 20:13:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512489840] [2021-08-25 20:13:59,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512489840] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606520938] [2021-08-25 20:13:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,251 INFO L87 Difference]: Start difference. First operand 277 states and 479 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,263 INFO L93 Difference]: Finished difference Result 517 states and 905 transitions. [2021-08-25 20:13:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-08-25 20:13:59,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,266 INFO L225 Difference]: With dead ends: 517 [2021-08-25 20:13:59,266 INFO L226 Difference]: Without dead ends: 515 [2021-08-25 20:13:59,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-25 20:13:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 385. [2021-08-25 20:13:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.7057291666666667) internal successors, (655), 384 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 655 transitions. [2021-08-25 20:13:59,275 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 655 transitions. Word has length 21 [2021-08-25 20:13:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,275 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 655 transitions. [2021-08-25 20:13:59,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 655 transitions. [2021-08-25 20:13:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 20:13:59,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,276 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-25 20:13:59,277 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1679384754, now seen corresponding path program 1 times [2021-08-25 20:13:59,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110764132] [2021-08-25 20:13:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110764132] [2021-08-25 20:13:59,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110764132] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349646487] [2021-08-25 20:13:59,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,299 INFO L87 Difference]: Start difference. First operand 385 states and 655 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,312 INFO L93 Difference]: Finished difference Result 917 states and 1569 transitions. [2021-08-25 20:13:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-08-25 20:13:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,322 INFO L225 Difference]: With dead ends: 917 [2021-08-25 20:13:59,322 INFO L226 Difference]: Without dead ends: 539 [2021-08-25 20:13:59,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-25 20:13:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 537. [2021-08-25 20:13:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.6921641791044777) internal successors, (907), 536 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 907 transitions. [2021-08-25 20:13:59,333 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 907 transitions. Word has length 21 [2021-08-25 20:13:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,333 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 907 transitions. [2021-08-25 20:13:59,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 907 transitions. [2021-08-25 20:13:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 20:13:59,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-25 20:13:59,335 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1801397547, now seen corresponding path program 1 times [2021-08-25 20:13:59,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018449715] [2021-08-25 20:13:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018449715] [2021-08-25 20:13:59,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018449715] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113591395] [2021-08-25 20:13:59,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,355 INFO L87 Difference]: Start difference. First operand 537 states and 907 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-08-25 20:13:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,368 INFO L93 Difference]: Finished difference Result 813 states and 1369 transitions. [2021-08-25 20:13:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) Word has length 22 [2021-08-25 20:13:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,370 INFO L225 Difference]: With dead ends: 813 [2021-08-25 20:13:59,370 INFO L226 Difference]: Without dead ends: 551 [2021-08-25 20:13:59,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-08-25 20:13:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 549. [2021-08-25 20:13:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.6697080291970803) internal successors, (915), 548 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 915 transitions. [2021-08-25 20:13:59,380 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 915 transitions. Word has length 22 [2021-08-25 20:13:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,380 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 915 transitions. [2021-08-25 20:13:59,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-08-25 20:13:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 915 transitions. [2021-08-25 20:13:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 20:13:59,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,381 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-25 20:13:59,382 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,382 INFO L82 PathProgramCache]: Analyzing trace with hash 521533869, now seen corresponding path program 1 times [2021-08-25 20:13:59,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532509691] [2021-08-25 20:13:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532509691] [2021-08-25 20:13:59,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532509691] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145210240] [2021-08-25 20:13:59,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,402 INFO L87 Difference]: Start difference. First operand 549 states and 915 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-08-25 20:13:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,417 INFO L93 Difference]: Finished difference Result 1001 states and 1693 transitions. [2021-08-25 20:13:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) Word has length 22 [2021-08-25 20:13:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,420 INFO L225 Difference]: With dead ends: 1001 [2021-08-25 20:13:59,420 INFO L226 Difference]: Without dead ends: 999 [2021-08-25 20:13:59,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-08-25 20:13:59,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 773. [2021-08-25 20:13:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.6308290155440415) internal successors, (1259), 772 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1259 transitions. [2021-08-25 20:13:59,434 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1259 transitions. Word has length 22 [2021-08-25 20:13:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,434 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 1259 transitions. [2021-08-25 20:13:59,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-08-25 20:13:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1259 transitions. [2021-08-25 20:13:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 20:13:59,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,436 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-25 20:13:59,436 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash -489583381, now seen corresponding path program 1 times [2021-08-25 20:13:59,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144543806] [2021-08-25 20:13:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144543806] [2021-08-25 20:13:59,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144543806] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109857431] [2021-08-25 20:13:59,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,456 INFO L87 Difference]: Start difference. First operand 773 states and 1259 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-08-25 20:13:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,483 INFO L93 Difference]: Finished difference Result 1817 states and 2973 transitions. [2021-08-25 20:13:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) Word has length 22 [2021-08-25 20:13:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,486 INFO L225 Difference]: With dead ends: 1817 [2021-08-25 20:13:59,487 INFO L226 Difference]: Without dead ends: 1063 [2021-08-25 20:13:59,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-08-25 20:13:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1061. [2021-08-25 20:13:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 1.6179245283018868) internal successors, (1715), 1060 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1715 transitions. [2021-08-25 20:13:59,504 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1715 transitions. Word has length 22 [2021-08-25 20:13:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,505 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1715 transitions. [2021-08-25 20:13:59,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-08-25 20:13:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1715 transitions. [2021-08-25 20:13:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:13:59,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,506 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-25 20:13:59,506 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1012104857, now seen corresponding path program 1 times [2021-08-25 20:13:59,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207972454] [2021-08-25 20:13:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207972454] [2021-08-25 20:13:59,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207972454] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930869633] [2021-08-25 20:13:59,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,525 INFO L87 Difference]: Start difference. First operand 1061 states and 1715 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,541 INFO L93 Difference]: Finished difference Result 1593 states and 2565 transitions. [2021-08-25 20:13:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-08-25 20:13:59,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,545 INFO L225 Difference]: With dead ends: 1593 [2021-08-25 20:13:59,545 INFO L226 Difference]: Without dead ends: 1079 [2021-08-25 20:13:59,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-08-25 20:13:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1077. [2021-08-25 20:13:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.5938661710037174) internal successors, (1715), 1076 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1715 transitions. [2021-08-25 20:13:59,562 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1715 transitions. Word has length 23 [2021-08-25 20:13:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,562 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1715 transitions. [2021-08-25 20:13:59,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1715 transitions. [2021-08-25 20:13:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:13:59,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-25 20:13:59,564 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2002998761, now seen corresponding path program 1 times [2021-08-25 20:13:59,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007821036] [2021-08-25 20:13:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007821036] [2021-08-25 20:13:59,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007821036] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839331125] [2021-08-25 20:13:59,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,582 INFO L87 Difference]: Start difference. First operand 1077 states and 1715 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,601 INFO L93 Difference]: Finished difference Result 1929 states and 3125 transitions. [2021-08-25 20:13:59,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-08-25 20:13:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,607 INFO L225 Difference]: With dead ends: 1929 [2021-08-25 20:13:59,607 INFO L226 Difference]: Without dead ends: 1927 [2021-08-25 20:13:59,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-08-25 20:13:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1541. [2021-08-25 20:13:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 1.55) internal successors, (2387), 1540 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2387 transitions. [2021-08-25 20:13:59,645 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2387 transitions. Word has length 23 [2021-08-25 20:13:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,645 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 2387 transitions. [2021-08-25 20:13:59,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2387 transitions. [2021-08-25 20:13:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:13:59,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,648 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-25 20:13:59,648 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,650 INFO L82 PathProgramCache]: Analyzing trace with hash 991881511, now seen corresponding path program 1 times [2021-08-25 20:13:59,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494348266] [2021-08-25 20:13:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494348266] [2021-08-25 20:13:59,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494348266] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153197085] [2021-08-25 20:13:59,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,686 INFO L87 Difference]: Start difference. First operand 1541 states and 2387 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,714 INFO L93 Difference]: Finished difference Result 3593 states and 5589 transitions. [2021-08-25 20:13:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-08-25 20:13:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,719 INFO L225 Difference]: With dead ends: 3593 [2021-08-25 20:13:59,719 INFO L226 Difference]: Without dead ends: 2087 [2021-08-25 20:13:59,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-08-25 20:13:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 2085. [2021-08-25 20:13:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2084 states have (on average 1.5369481765834934) internal successors, (3203), 2084 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 3203 transitions. [2021-08-25 20:13:59,777 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 3203 transitions. Word has length 23 [2021-08-25 20:13:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,777 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 3203 transitions. [2021-08-25 20:13:59,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 3203 transitions. [2021-08-25 20:13:59,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:13:59,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,779 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-25 20:13:59,780 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1963634176, now seen corresponding path program 1 times [2021-08-25 20:13:59,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60722368] [2021-08-25 20:13:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60722368] [2021-08-25 20:13:59,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60722368] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206158423] [2021-08-25 20:13:59,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,806 INFO L87 Difference]: Start difference. First operand 2085 states and 3203 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,834 INFO L93 Difference]: Finished difference Result 3129 states and 4789 transitions. [2021-08-25 20:13:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-08-25 20:13:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,839 INFO L225 Difference]: With dead ends: 3129 [2021-08-25 20:13:59,839 INFO L226 Difference]: Without dead ends: 2119 [2021-08-25 20:13:59,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-08-25 20:13:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 2117. [2021-08-25 20:13:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 1.5137051039697542) internal successors, (3203), 2116 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3203 transitions. [2021-08-25 20:13:59,881 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3203 transitions. Word has length 24 [2021-08-25 20:13:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,881 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 3203 transitions. [2021-08-25 20:13:59,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3203 transitions. [2021-08-25 20:13:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:13:59,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,883 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-25 20:13:59,883 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash 683770498, now seen corresponding path program 1 times [2021-08-25 20:13:59,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902877648] [2021-08-25 20:13:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902877648] [2021-08-25 20:13:59,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902877648] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071937448] [2021-08-25 20:13:59,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,907 INFO L87 Difference]: Start difference. First operand 2117 states and 3203 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,939 INFO L93 Difference]: Finished difference Result 3721 states and 5733 transitions. [2021-08-25 20:13:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-08-25 20:13:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,962 INFO L225 Difference]: With dead ends: 3721 [2021-08-25 20:13:59,963 INFO L226 Difference]: Without dead ends: 3719 [2021-08-25 20:13:59,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-08-25 20:14:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3077. [2021-08-25 20:14:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 1.467815344603381) internal successors, (4515), 3076 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 4515 transitions. [2021-08-25 20:14:00,011 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 4515 transitions. Word has length 24 [2021-08-25 20:14:00,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,012 INFO L470 AbstractCegarLoop]: Abstraction has 3077 states and 4515 transitions. [2021-08-25 20:14:00,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:00,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 4515 transitions. [2021-08-25 20:14:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:14:00,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,015 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-25 20:14:00,015 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,016 INFO L82 PathProgramCache]: Analyzing trace with hash -327346752, now seen corresponding path program 1 times [2021-08-25 20:14:00,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991656899] [2021-08-25 20:14:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991656899] [2021-08-25 20:14:00,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991656899] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137498854] [2021-08-25 20:14:00,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,042 INFO L87 Difference]: Start difference. First operand 3077 states and 4515 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,085 INFO L93 Difference]: Finished difference Result 7113 states and 10469 transitions. [2021-08-25 20:14:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-08-25 20:14:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,095 INFO L225 Difference]: With dead ends: 7113 [2021-08-25 20:14:00,095 INFO L226 Difference]: Without dead ends: 4103 [2021-08-25 20:14:00,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-08-25 20:14:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4101. [2021-08-25 20:14:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 4100 states have (on average 1.4524390243902439) internal successors, (5955), 4100 states have internal predecessors, (5955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 5955 transitions. [2021-08-25 20:14:00,180 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 5955 transitions. Word has length 24 [2021-08-25 20:14:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,180 INFO L470 AbstractCegarLoop]: Abstraction has 4101 states and 5955 transitions. [2021-08-25 20:14:00,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 5955 transitions. [2021-08-25 20:14:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 20:14:00,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-25 20:14:00,183 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,183 INFO L82 PathProgramCache]: Analyzing trace with hash -277735972, now seen corresponding path program 1 times [2021-08-25 20:14:00,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440881834] [2021-08-25 20:14:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440881834] [2021-08-25 20:14:00,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440881834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017824395] [2021-08-25 20:14:00,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,199 INFO L87 Difference]: Start difference. First operand 4101 states and 5955 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-25 20:14:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,234 INFO L93 Difference]: Finished difference Result 6153 states and 8901 transitions. [2021-08-25 20:14:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) Word has length 25 [2021-08-25 20:14:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,244 INFO L225 Difference]: With dead ends: 6153 [2021-08-25 20:14:00,244 INFO L226 Difference]: Without dead ends: 4167 [2021-08-25 20:14:00,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-08-25 20:14:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 4165. [2021-08-25 20:14:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4165 states, 4164 states have (on average 1.430115273775216) internal successors, (5955), 4164 states have internal predecessors, (5955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 5955 transitions. [2021-08-25 20:14:00,326 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 5955 transitions. Word has length 25 [2021-08-25 20:14:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,326 INFO L470 AbstractCegarLoop]: Abstraction has 4165 states and 5955 transitions. [2021-08-25 20:14:00,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-25 20:14:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 5955 transitions. [2021-08-25 20:14:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 20:14:00,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-25 20:14:00,329 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1557599650, now seen corresponding path program 1 times [2021-08-25 20:14:00,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822774013] [2021-08-25 20:14:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822774013] [2021-08-25 20:14:00,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822774013] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638610807] [2021-08-25 20:14:00,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,345 INFO L87 Difference]: Start difference. First operand 4165 states and 5955 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-25 20:14:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,435 INFO L93 Difference]: Finished difference Result 7177 states and 10437 transitions. [2021-08-25 20:14:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) Word has length 25 [2021-08-25 20:14:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,446 INFO L225 Difference]: With dead ends: 7177 [2021-08-25 20:14:00,446 INFO L226 Difference]: Without dead ends: 7175 [2021-08-25 20:14:00,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2021-08-25 20:14:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 6149. [2021-08-25 20:14:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6149 states, 6148 states have (on average 1.385003253090436) internal successors, (8515), 6148 states have internal predecessors, (8515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6149 states to 6149 states and 8515 transitions. [2021-08-25 20:14:00,556 INFO L78 Accepts]: Start accepts. Automaton has 6149 states and 8515 transitions. Word has length 25 [2021-08-25 20:14:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,556 INFO L470 AbstractCegarLoop]: Abstraction has 6149 states and 8515 transitions. [2021-08-25 20:14:00,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-25 20:14:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 6149 states and 8515 transitions. [2021-08-25 20:14:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 20:14:00,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,562 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-25 20:14:00,563 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1726250396, now seen corresponding path program 1 times [2021-08-25 20:14:00,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008555472] [2021-08-25 20:14:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008555472] [2021-08-25 20:14:00,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008555472] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552387928] [2021-08-25 20:14:00,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,580 INFO L87 Difference]: Start difference. First operand 6149 states and 8515 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-25 20:14:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,672 INFO L93 Difference]: Finished difference Result 14089 states and 19525 transitions. [2021-08-25 20:14:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) Word has length 25 [2021-08-25 20:14:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,688 INFO L225 Difference]: With dead ends: 14089 [2021-08-25 20:14:00,689 INFO L226 Difference]: Without dead ends: 8071 [2021-08-25 20:14:00,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8071 states. [2021-08-25 20:14:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8071 to 8069. [2021-08-25 20:14:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 1.364774417451661) internal successors, (11011), 8068 states have internal predecessors, (11011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 11011 transitions. [2021-08-25 20:14:00,952 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 11011 transitions. Word has length 25 [2021-08-25 20:14:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,952 INFO L470 AbstractCegarLoop]: Abstraction has 8069 states and 11011 transitions. [2021-08-25 20:14:00,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-25 20:14:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 11011 transitions. [2021-08-25 20:14:00,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 20:14:00,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,974 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-25 20:14:00,975 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1040733483, now seen corresponding path program 1 times [2021-08-25 20:14:00,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208264287] [2021-08-25 20:14:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:01,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:01,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208264287] [2021-08-25 20:14:01,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208264287] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:01,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:01,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:01,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375778736] [2021-08-25 20:14:01,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:01,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:01,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:01,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,003 INFO L87 Difference]: Start difference. First operand 8069 states and 11011 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-08-25 20:14:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:01,079 INFO L93 Difference]: Finished difference Result 12105 states and 16453 transitions. [2021-08-25 20:14:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:01,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) Word has length 26 [2021-08-25 20:14:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:01,117 INFO L225 Difference]: With dead ends: 12105 [2021-08-25 20:14:01,117 INFO L226 Difference]: Without dead ends: 8199 [2021-08-25 20:14:01,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8199 states. [2021-08-25 20:14:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8199 to 8197. [2021-08-25 20:14:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8197 states, 8196 states have (on average 1.343460224499756) internal successors, (11011), 8196 states have internal predecessors, (11011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8197 states to 8197 states and 11011 transitions. [2021-08-25 20:14:01,228 INFO L78 Accepts]: Start accepts. Automaton has 8197 states and 11011 transitions. Word has length 26 [2021-08-25 20:14:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:01,228 INFO L470 AbstractCegarLoop]: Abstraction has 8197 states and 11011 transitions. [2021-08-25 20:14:01,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-08-25 20:14:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 8197 states and 11011 transitions. [2021-08-25 20:14:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 20:14:01,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:01,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:01,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-25 20:14:01,234 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:01,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1974370135, now seen corresponding path program 1 times [2021-08-25 20:14:01,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:01,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628445943] [2021-08-25 20:14:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:01,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:01,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:01,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628445943] [2021-08-25 20:14:01,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628445943] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:01,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:01,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:01,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716749780] [2021-08-25 20:14:01,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:01,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,264 INFO L87 Difference]: Start difference. First operand 8197 states and 11011 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-08-25 20:14:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:01,461 INFO L93 Difference]: Finished difference Result 13833 states and 18821 transitions. [2021-08-25 20:14:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) Word has length 26 [2021-08-25 20:14:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:01,481 INFO L225 Difference]: With dead ends: 13833 [2021-08-25 20:14:01,481 INFO L226 Difference]: Without dead ends: 13831 [2021-08-25 20:14:01,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13831 states. [2021-08-25 20:14:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13831 to 12293. [2021-08-25 20:14:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12293 states, 12292 states have (on average 1.3019036771884152) internal successors, (16003), 12292 states have internal predecessors, (16003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12293 states to 12293 states and 16003 transitions. [2021-08-25 20:14:01,706 INFO L78 Accepts]: Start accepts. Automaton has 12293 states and 16003 transitions. Word has length 26 [2021-08-25 20:14:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:01,707 INFO L470 AbstractCegarLoop]: Abstraction has 12293 states and 16003 transitions. [2021-08-25 20:14:01,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-08-25 20:14:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 12293 states and 16003 transitions. [2021-08-25 20:14:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 20:14:01,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:01,719 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:01,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-25 20:14:01,719 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash 963252885, now seen corresponding path program 1 times [2021-08-25 20:14:01,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:01,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193841382] [2021-08-25 20:14:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:01,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:01,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:01,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193841382] [2021-08-25 20:14:01,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193841382] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:01,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:01,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:01,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886385612] [2021-08-25 20:14:01,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:01,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,743 INFO L87 Difference]: Start difference. First operand 12293 states and 16003 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-08-25 20:14:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:01,904 INFO L93 Difference]: Finished difference Result 27913 states and 36229 transitions. [2021-08-25 20:14:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:01,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) Word has length 26 [2021-08-25 20:14:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:01,928 INFO L225 Difference]: With dead ends: 27913 [2021-08-25 20:14:01,928 INFO L226 Difference]: Without dead ends: 15879 [2021-08-25 20:14:01,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15879 states. [2021-08-25 20:14:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15879 to 15877. [2021-08-25 20:14:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15877 states, 15876 states have (on average 1.2740614764424287) internal successors, (20227), 15876 states have internal predecessors, (20227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15877 states to 15877 states and 20227 transitions. [2021-08-25 20:14:02,293 INFO L78 Accepts]: Start accepts. Automaton has 15877 states and 20227 transitions. Word has length 26 [2021-08-25 20:14:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:02,294 INFO L470 AbstractCegarLoop]: Abstraction has 15877 states and 20227 transitions. [2021-08-25 20:14:02,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-08-25 20:14:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 15877 states and 20227 transitions. [2021-08-25 20:14:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:14:02,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:02,305 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:02,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-25 20:14:02,305 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1076147793, now seen corresponding path program 1 times [2021-08-25 20:14:02,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:02,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338976334] [2021-08-25 20:14:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:02,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:02,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:02,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338976334] [2021-08-25 20:14:02,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338976334] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:02,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:02,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:02,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027904802] [2021-08-25 20:14:02,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:02,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:02,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:02,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:02,325 INFO L87 Difference]: Start difference. First operand 15877 states and 20227 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-08-25 20:14:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:02,432 INFO L93 Difference]: Finished difference Result 23817 states and 30213 transitions. [2021-08-25 20:14:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:02,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) Word has length 27 [2021-08-25 20:14:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:02,456 INFO L225 Difference]: With dead ends: 23817 [2021-08-25 20:14:02,456 INFO L226 Difference]: Without dead ends: 16135 [2021-08-25 20:14:02,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16135 states. [2021-08-25 20:14:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16135 to 16133. [2021-08-25 20:14:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16133 states, 16132 states have (on average 1.2538432928341186) internal successors, (20227), 16132 states have internal predecessors, (20227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16133 states to 16133 states and 20227 transitions. [2021-08-25 20:14:02,780 INFO L78 Accepts]: Start accepts. Automaton has 16133 states and 20227 transitions. Word has length 27 [2021-08-25 20:14:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:02,781 INFO L470 AbstractCegarLoop]: Abstraction has 16133 states and 20227 transitions. [2021-08-25 20:14:02,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-08-25 20:14:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 16133 states and 20227 transitions. [2021-08-25 20:14:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:14:02,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:02,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:02,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-25 20:14:02,793 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:02,793 INFO L82 PathProgramCache]: Analyzing trace with hash -203715885, now seen corresponding path program 1 times [2021-08-25 20:14:02,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:02,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161706816] [2021-08-25 20:14:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:02,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:02,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:02,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161706816] [2021-08-25 20:14:02,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161706816] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:02,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:02,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:02,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521693246] [2021-08-25 20:14:02,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:02,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:02,810 INFO L87 Difference]: Start difference. First operand 16133 states and 20227 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-08-25 20:14:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:03,014 INFO L93 Difference]: Finished difference Result 26633 states and 33541 transitions. [2021-08-25 20:14:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:03,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) Word has length 27 [2021-08-25 20:14:03,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:03,053 INFO L225 Difference]: With dead ends: 26633 [2021-08-25 20:14:03,053 INFO L226 Difference]: Without dead ends: 26631 [2021-08-25 20:14:03,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26631 states. [2021-08-25 20:14:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26631 to 24581. [2021-08-25 20:14:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24581 states, 24580 states have (on average 1.2186737184703011) internal successors, (29955), 24580 states have internal predecessors, (29955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24581 states to 24581 states and 29955 transitions. [2021-08-25 20:14:03,505 INFO L78 Accepts]: Start accepts. Automaton has 24581 states and 29955 transitions. Word has length 27 [2021-08-25 20:14:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:03,505 INFO L470 AbstractCegarLoop]: Abstraction has 24581 states and 29955 transitions. [2021-08-25 20:14:03,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-08-25 20:14:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 24581 states and 29955 transitions. [2021-08-25 20:14:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:14:03,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:03,540 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:03,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-25 20:14:03,540 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1214833135, now seen corresponding path program 1 times [2021-08-25 20:14:03,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:03,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371212903] [2021-08-25 20:14:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:03,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:03,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:03,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371212903] [2021-08-25 20:14:03,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371212903] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:03,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:03,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:03,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92909455] [2021-08-25 20:14:03,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:03,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:03,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:03,561 INFO L87 Difference]: Start difference. First operand 24581 states and 29955 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-08-25 20:14:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:03,915 INFO L93 Difference]: Finished difference Result 55305 states and 66821 transitions. [2021-08-25 20:14:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:03,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) Word has length 27 [2021-08-25 20:14:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:03,958 INFO L225 Difference]: With dead ends: 55305 [2021-08-25 20:14:03,958 INFO L226 Difference]: Without dead ends: 31239 [2021-08-25 20:14:03,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31239 states. [2021-08-25 20:14:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31239 to 31237. [2021-08-25 20:14:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31237 states, 31236 states have (on average 1.1802727621974645) internal successors, (36867), 31236 states have internal predecessors, (36867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31237 states to 31237 states and 36867 transitions. [2021-08-25 20:14:04,602 INFO L78 Accepts]: Start accepts. Automaton has 31237 states and 36867 transitions. Word has length 27 [2021-08-25 20:14:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:04,602 INFO L470 AbstractCegarLoop]: Abstraction has 31237 states and 36867 transitions. [2021-08-25 20:14:04,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-08-25 20:14:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 31237 states and 36867 transitions. [2021-08-25 20:14:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 20:14:04,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:04,620 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:04,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-25 20:14:04,620 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:04,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2020009046, now seen corresponding path program 1 times [2021-08-25 20:14:04,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:04,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236688363] [2021-08-25 20:14:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:04,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:04,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236688363] [2021-08-25 20:14:04,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236688363] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:04,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:04,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:04,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881909180] [2021-08-25 20:14:04,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:04,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:04,639 INFO L87 Difference]: Start difference. First operand 31237 states and 36867 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-08-25 20:14:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:04,998 INFO L93 Difference]: Finished difference Result 46857 states and 55045 transitions. [2021-08-25 20:14:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:04,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) Word has length 28 [2021-08-25 20:14:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:05,054 INFO L225 Difference]: With dead ends: 46857 [2021-08-25 20:14:05,054 INFO L226 Difference]: Without dead ends: 31751 [2021-08-25 20:14:05,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31751 states. [2021-08-25 20:14:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31751 to 31749. [2021-08-25 20:14:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31749 states, 31748 states have (on average 1.1612385032128008) internal successors, (36867), 31748 states have internal predecessors, (36867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31749 states to 31749 states and 36867 transitions. [2021-08-25 20:14:05,623 INFO L78 Accepts]: Start accepts. Automaton has 31749 states and 36867 transitions. Word has length 28 [2021-08-25 20:14:05,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:05,623 INFO L470 AbstractCegarLoop]: Abstraction has 31749 states and 36867 transitions. [2021-08-25 20:14:05,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-08-25 20:14:05,623 INFO L276 IsEmpty]: Start isEmpty. Operand 31749 states and 36867 transitions. [2021-08-25 20:14:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 20:14:05,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:05,641 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:05,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-25 20:14:05,642 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:05,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:05,642 INFO L82 PathProgramCache]: Analyzing trace with hash 995094572, now seen corresponding path program 1 times [2021-08-25 20:14:05,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:05,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878331354] [2021-08-25 20:14:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:05,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:05,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:05,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878331354] [2021-08-25 20:14:05,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878331354] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:05,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:05,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:05,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120730010] [2021-08-25 20:14:05,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:05,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:05,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:05,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:05,662 INFO L87 Difference]: Start difference. First operand 31749 states and 36867 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-08-25 20:14:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:06,176 INFO L93 Difference]: Finished difference Result 92167 states and 104452 transitions. [2021-08-25 20:14:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) Word has length 28 [2021-08-25 20:14:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:06,221 INFO L225 Difference]: With dead ends: 92167 [2021-08-25 20:14:06,221 INFO L226 Difference]: Without dead ends: 31749 [2021-08-25 20:14:06,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31749 states. [2021-08-25 20:14:06,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31749 to 31749. [2021-08-25 20:14:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31749 states, 31748 states have (on average 1.096730502708832) internal successors, (34819), 31748 states have internal predecessors, (34819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31749 states to 31749 states and 34819 transitions. [2021-08-25 20:14:06,759 INFO L78 Accepts]: Start accepts. Automaton has 31749 states and 34819 transitions. Word has length 28 [2021-08-25 20:14:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:06,759 INFO L470 AbstractCegarLoop]: Abstraction has 31749 states and 34819 transitions. [2021-08-25 20:14:06,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-08-25 20:14:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 31749 states and 34819 transitions. [2021-08-25 20:14:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 20:14:06,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:06,777 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:06,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-25 20:14:06,777 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2006211822, now seen corresponding path program 1 times [2021-08-25 20:14:06,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:06,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261907502] [2021-08-25 20:14:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:06,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:06,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:06,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261907502] [2021-08-25 20:14:06,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261907502] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:06,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:06,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:06,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638495916] [2021-08-25 20:14:06,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:06,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:06,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:06,800 INFO L87 Difference]: Start difference. First operand 31749 states and 34819 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-08-25 20:14:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:07,071 INFO L93 Difference]: Finished difference Result 31749 states and 34819 transitions. [2021-08-25 20:14:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:07,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) Word has length 28 [2021-08-25 20:14:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:07,072 INFO L225 Difference]: With dead ends: 31749 [2021-08-25 20:14:07,073 INFO L226 Difference]: Without dead ends: 0 [2021-08-25 20:14:07,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:07,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-25 20:14:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-25 20:14:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-25 20:14:07,086 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-08-25 20:14:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:07,087 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-25 20:14:07,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-08-25 20:14:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-25 20:14:07,087 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-25 20:14:07,089 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 20:14:07,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-25 20:14:07,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-25 20:14:07,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:07,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:07,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:07,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:07,108 INFO L857 garLoopResultBuilder]: For program point L159-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,108 INFO L857 garLoopResultBuilder]: For program point L93-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,108 INFO L857 garLoopResultBuilder]: For program point L85-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,109 INFO L857 garLoopResultBuilder]: For program point L77-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,109 INFO L857 garLoopResultBuilder]: For program point L135(line 135) no Hoare annotation was computed. [2021-08-25 20:14:07,109 INFO L857 garLoopResultBuilder]: For program point L160(line 160) no Hoare annotation was computed. [2021-08-25 20:14:07,109 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-25 20:14:07,109 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-25 20:14:07,109 INFO L857 garLoopResultBuilder]: For program point L119-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,109 INFO L857 garLoopResultBuilder]: For program point L144-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,110 INFO L860 garLoopResultBuilder]: At program point L169-1(lines 44 174) the Hoare annotation is: true [2021-08-25 20:14:07,110 INFO L857 garLoopResultBuilder]: For program point L120(line 120) no Hoare annotation was computed. [2021-08-25 20:14:07,110 INFO L860 garLoopResultBuilder]: At program point L178(lines 6 179) the Hoare annotation is: true [2021-08-25 20:14:07,110 INFO L857 garLoopResultBuilder]: For program point L145(line 145) no Hoare annotation was computed. [2021-08-25 20:14:07,110 INFO L857 garLoopResultBuilder]: For program point L46(lines 46 48) no Hoare annotation was computed. [2021-08-25 20:14:07,110 INFO L857 garLoopResultBuilder]: For program point L170(line 170) no Hoare annotation was computed. [2021-08-25 20:14:07,111 INFO L853 garLoopResultBuilder]: At program point L170-1(lines 7 179) the Hoare annotation is: false [2021-08-25 20:14:07,111 INFO L857 garLoopResultBuilder]: For program point L129-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,111 INFO L857 garLoopResultBuilder]: For program point L154-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,111 INFO L857 garLoopResultBuilder]: For program point L113-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,111 INFO L857 garLoopResultBuilder]: For program point L105-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,111 INFO L857 garLoopResultBuilder]: For program point L130(line 130) no Hoare annotation was computed. [2021-08-25 20:14:07,111 INFO L857 garLoopResultBuilder]: For program point L97-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,111 INFO L857 garLoopResultBuilder]: For program point L155(line 155) no Hoare annotation was computed. [2021-08-25 20:14:07,112 INFO L857 garLoopResultBuilder]: For program point L89-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,112 INFO L857 garLoopResultBuilder]: For program point L81-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,112 INFO L857 garLoopResultBuilder]: For program point L139-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,112 INFO L857 garLoopResultBuilder]: For program point L73(lines 73 75) no Hoare annotation was computed. [2021-08-25 20:14:07,112 INFO L857 garLoopResultBuilder]: For program point L73-2(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,112 INFO L857 garLoopResultBuilder]: For program point L164-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,112 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-25 20:14:07,113 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 177) no Hoare annotation was computed. [2021-08-25 20:14:07,113 INFO L857 garLoopResultBuilder]: For program point L140(line 140) no Hoare annotation was computed. [2021-08-25 20:14:07,113 INFO L857 garLoopResultBuilder]: For program point L165(line 165) no Hoare annotation was computed. [2021-08-25 20:14:07,113 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-25 20:14:07,113 INFO L857 garLoopResultBuilder]: For program point L124-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,113 INFO L857 garLoopResultBuilder]: For program point L149-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,114 INFO L857 garLoopResultBuilder]: For program point L125(line 125) no Hoare annotation was computed. [2021-08-25 20:14:07,114 INFO L857 garLoopResultBuilder]: For program point L150(line 150) no Hoare annotation was computed. [2021-08-25 20:14:07,114 INFO L860 garLoopResultBuilder]: At program point L175(lines 7 179) the Hoare annotation is: true [2021-08-25 20:14:07,114 INFO L857 garLoopResultBuilder]: For program point L109-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,114 INFO L857 garLoopResultBuilder]: For program point L134-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,114 INFO L857 garLoopResultBuilder]: For program point L101-1(lines 44 174) no Hoare annotation was computed. [2021-08-25 20:14:07,117 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 20:14:07,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 08:14:07 BoogieIcfgContainer [2021-08-25 20:14:07,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 20:14:07,129 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 20:14:07,129 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 20:14:07,129 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 20:14:07,129 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:13:58" (3/4) ... [2021-08-25 20:14:07,131 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-25 20:14:07,140 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-25 20:14:07,141 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-25 20:14:07,141 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 20:14:07,141 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 20:14:07,179 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 20:14:07,179 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 20:14:07,181 INFO L168 Benchmark]: Toolchain (without parser) took 9387.90 ms. Allocated memory was 50.3 MB in the beginning and 7.0 GB in the end (delta: 6.9 GB). Free memory was 27.9 MB in the beginning and 6.5 GB in the end (delta: -6.4 GB). Peak memory consumption was 493.1 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:07,181 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 50.3 MB. Free memory was 32.6 MB in the beginning and 32.5 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 20:14:07,181 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.05 ms. Allocated memory is still 50.3 MB. Free memory was 27.7 MB in the beginning and 28.9 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:07,182 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.05 ms. Allocated memory is still 50.3 MB. Free memory was 28.9 MB in the beginning and 27.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 20:14:07,182 INFO L168 Benchmark]: Boogie Preprocessor took 15.09 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 25.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:07,182 INFO L168 Benchmark]: RCFGBuilder took 439.65 ms. Allocated memory was 50.3 MB in the beginning and 73.4 MB in the end (delta: 23.1 MB). Free memory was 25.8 MB in the beginning and 39.3 MB in the end (delta: -13.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:07,182 INFO L168 Benchmark]: TraceAbstraction took 8604.10 ms. Allocated memory was 73.4 MB in the beginning and 7.0 GB in the end (delta: 6.9 GB). Free memory was 38.9 MB in the beginning and 6.5 GB in the end (delta: -6.4 GB). Peak memory consumption was 474.0 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:07,182 INFO L168 Benchmark]: Witness Printer took 50.24 ms. Allocated memory is still 7.0 GB. Free memory was 6.5 GB in the beginning and 6.5 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:07,184 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 50.3 MB. Free memory was 32.6 MB in the beginning and 32.5 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 236.05 ms. Allocated memory is still 50.3 MB. Free memory was 27.7 MB in the beginning and 28.9 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.05 ms. Allocated memory is still 50.3 MB. Free memory was 28.9 MB in the beginning and 27.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.09 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 25.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 439.65 ms. Allocated memory was 50.3 MB in the beginning and 73.4 MB in the end (delta: 23.1 MB). Free memory was 25.8 MB in the beginning and 39.3 MB in the end (delta: -13.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8604.10 ms. Allocated memory was 73.4 MB in the beginning and 7.0 GB in the end (delta: 6.9 GB). Free memory was 38.9 MB in the beginning and 6.5 GB in the end (delta: -6.4 GB). Peak memory consumption was 474.0 MB. Max. memory is 16.1 GB. * Witness Printer took 50.24 ms. Allocated memory is still 7.0 GB. Free memory was 6.5 GB in the beginning and 6.5 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 177]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8537.3ms, OverallIterations: 31, TraceHistogramMax: 1, EmptinessCheckTime: 181.7ms, AutomataDifference: 3387.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 16.9ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2753 SDtfs, 1400 SDslu, 1835 SDs, 0 SdLazy, 163 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 168.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31749occurred in iteration=29, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3961.6ms AutomataMinimizationTime, 31 MinimizatonAttempts, 6176 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 2057 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 6.2ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 49.1ms SsaConstructionTime, 153.4ms SatisfiabilityAnalysisTime, 494.1ms InterpolantComputationTime, 720 NumberOfCodeBlocks, 720 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 689 ConstructedInterpolants, 0 QuantifiedInterpolants, 1492 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-25 20:14:07,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...