./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/s3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/s3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg --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 d053be7ac759c4172c4b0b5fbe009ed8f624c0c8659eb750e9996926d5d3b0a1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/s3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg --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 d053be7ac759c4172c4b0b5fbe009ed8f624c0c8659eb750e9996926d5d3b0a1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:11:37,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:11:37,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:11:37,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:11:37,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:11:37,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:11:37,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:11:37,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:11:37,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:11:37,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:11:37,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:11:37,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:11:37,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:11:37,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:11:37,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:11:37,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:11:37,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:11:37,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:11:38,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:11:38,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:11:38,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:11:38,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:11:38,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:11:38,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:11:38,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:11:38,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:11:38,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:11:38,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:11:38,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:11:38,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:11:38,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:11:38,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:11:38,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:11:38,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:11:38,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:11:38,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:11:38,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:11:38,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:11:38,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:11:38,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:11:38,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:11:38,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:11:38,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:11:38,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:11:38,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:11:38,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:11:38,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:11:38,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:11:38,058 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:11:38,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:11:38,059 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:11:38,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:11:38,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:11:38,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:11:38,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:11:38,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:11:38,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:11:38,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:11:38,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:11:38,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:11:38,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:11:38,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:11:38,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:11:38,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:11:38,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:11:38,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:11:38,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:11:38,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:11:38,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:11:38,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:11:38,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:11:38,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:11:38,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:11:38,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:11:38,065 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d053be7ac759c4172c4b0b5fbe009ed8f624c0c8659eb750e9996926d5d3b0a1 [2021-10-28 09:11:38,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:11:38,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:11:38,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:11:38,374 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:11:38,375 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:11:38,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loops/s3.i [2021-10-28 09:11:38,437 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data/b3bd6f598/2a453b2782b84bf49f9227806f9b0c30/FLAG963d6cb33 [2021-10-28 09:11:39,025 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:11:39,026 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/sv-benchmarks/c/loops/s3.i [2021-10-28 09:11:39,044 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data/b3bd6f598/2a453b2782b84bf49f9227806f9b0c30/FLAG963d6cb33 [2021-10-28 09:11:39,445 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data/b3bd6f598/2a453b2782b84bf49f9227806f9b0c30 [2021-10-28 09:11:39,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:11:39,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:11:39,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:11:39,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:11:39,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:11:39,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:11:39" (1/1) ... [2021-10-28 09:11:39,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@499c58ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:39, skipping insertion in model container [2021-10-28 09:11:39,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:11:39" (1/1) ... [2021-10-28 09:11:39,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:11:39,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:11:39,986 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-28 09:11:39,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:11:40,027 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:11:40,149 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-28 09:11:40,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:11:40,172 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:11:40,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40 WrapperNode [2021-10-28 09:11:40,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:11:40,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:11:40,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:11:40,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:11:40,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:11:40,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:11:40,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:11:40,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:11:40,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:11:40,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:11:40,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:11:40,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:11:40,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (1/1) ... [2021-10-28 09:11:40,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:11:40,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:40,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:40,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:11:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:11:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:11:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:11:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:11:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:11:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:11:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:11:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:11:40,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:11:40,687 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-28 09:11:43,887 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-28 09:11:43,888 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-28 09:11:43,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:11:43,897 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-28 09:11:43,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:11:43 BoogieIcfgContainer [2021-10-28 09:11:43,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:11:43,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:11:43,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:11:43,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:11:43,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:11:39" (1/3) ... [2021-10-28 09:11:43,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f8d752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:11:43, skipping insertion in model container [2021-10-28 09:11:43,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:40" (2/3) ... [2021-10-28 09:11:43,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f8d752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:11:43, skipping insertion in model container [2021-10-28 09:11:43,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:11:43" (3/3) ... [2021-10-28 09:11:43,909 INFO L111 eAbstractionObserver]: Analyzing ICFG s3.i [2021-10-28 09:11:43,915 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:11:43,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:11:43,978 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:11:43,986 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:11:43,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:11:44,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:11:44,035 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:11:44,036 INFO L513 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] [2021-10-28 09:11:44,036 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:11:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:44,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1457703967, now seen corresponding path program 1 times [2021-10-28 09:11:44,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:44,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353059198] [2021-10-28 09:11:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:44,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:44,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:44,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353059198] [2021-10-28 09:11:44,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353059198] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:11:44,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:11:44,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:11:44,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426998088] [2021-10-28 09:11:44,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:11:44,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:44,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:11:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:11:44,679 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-10-28 09:11:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:44,841 INFO L93 Difference]: Finished difference Result 375 states and 626 transitions. [2021-10-28 09:11:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:11:44,844 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 [2021-10-28 09:11:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:11:44,864 INFO L225 Difference]: With dead ends: 375 [2021-10-28 09:11:44,866 INFO L226 Difference]: Without dead ends: 217 [2021-10-28 09:11:44,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:11:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-28 09:11:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-10-28 09:11:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 321 transitions. [2021-10-28 09:11:44,966 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 321 transitions. Word has length 24 [2021-10-28 09:11:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:11:44,968 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 321 transitions. [2021-10-28 09:11:44,969 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) [2021-10-28 09:11:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 321 transitions. [2021-10-28 09:11:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 09:11:44,975 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:11:44,975 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:44,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:11:44,976 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:11:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash 546953675, now seen corresponding path program 1 times [2021-10-28 09:11:44,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:44,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880642010] [2021-10-28 09:11:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:44,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:45,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:45,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880642010] [2021-10-28 09:11:45,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880642010] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:11:45,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:11:45,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:11:45,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474426809] [2021-10-28 09:11:45,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:11:45,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:11:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:11:45,191 INFO L87 Difference]: Start difference. First operand 217 states and 321 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:49,655 INFO L93 Difference]: Finished difference Result 359 states and 534 transitions. [2021-10-28 09:11:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:11:49,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-10-28 09:11:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:11:49,659 INFO L225 Difference]: With dead ends: 359 [2021-10-28 09:11:49,659 INFO L226 Difference]: Without dead ends: 252 [2021-10-28 09:11:49,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:11:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-28 09:11:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 235. [2021-10-28 09:11:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5) internal successors, (351), 234 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 351 transitions. [2021-10-28 09:11:49,683 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 351 transitions. Word has length 39 [2021-10-28 09:11:49,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:11:49,683 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 351 transitions. [2021-10-28 09:11:49,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 351 transitions. [2021-10-28 09:11:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 09:11:49,690 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:11:49,690 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:49,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:11:49,693 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:11:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1468155038, now seen corresponding path program 1 times [2021-10-28 09:11:49,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:49,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342921652] [2021-10-28 09:11:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:49,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:49,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:49,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342921652] [2021-10-28 09:11:49,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342921652] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:11:49,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:11:49,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:11:49,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72238267] [2021-10-28 09:11:49,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:11:49,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:11:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:11:49,876 INFO L87 Difference]: Start difference. First operand 235 states and 351 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:54,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:54,282 INFO L93 Difference]: Finished difference Result 376 states and 562 transitions. [2021-10-28 09:11:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:11:54,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-10-28 09:11:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:11:54,285 INFO L225 Difference]: With dead ends: 376 [2021-10-28 09:11:54,285 INFO L226 Difference]: Without dead ends: 251 [2021-10-28 09:11:54,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:11:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-28 09:11:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-28 09:11:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4957264957264957) internal successors, (350), 234 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 350 transitions. [2021-10-28 09:11:54,297 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 350 transitions. Word has length 54 [2021-10-28 09:11:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:11:54,298 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 350 transitions. [2021-10-28 09:11:54,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 350 transitions. [2021-10-28 09:11:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 09:11:54,301 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:11:54,301 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:54,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:11:54,301 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:11:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1486810496, now seen corresponding path program 1 times [2021-10-28 09:11:54,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:54,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286628526] [2021-10-28 09:11:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:54,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:54,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:54,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286628526] [2021-10-28 09:11:54,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286628526] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:11:54,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:11:54,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:11:54,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110875012] [2021-10-28 09:11:54,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:11:54,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:54,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:11:54,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:11:54,391 INFO L87 Difference]: Start difference. First operand 235 states and 350 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:58,777 INFO L93 Difference]: Finished difference Result 376 states and 560 transitions. [2021-10-28 09:11:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:11:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-10-28 09:11:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:11:58,780 INFO L225 Difference]: With dead ends: 376 [2021-10-28 09:11:58,781 INFO L226 Difference]: Without dead ends: 251 [2021-10-28 09:11:58,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:11:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-28 09:11:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-28 09:11:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4914529914529915) internal successors, (349), 234 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 349 transitions. [2021-10-28 09:11:58,796 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 349 transitions. Word has length 54 [2021-10-28 09:11:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:11:58,796 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 349 transitions. [2021-10-28 09:11:58,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:11:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 349 transitions. [2021-10-28 09:11:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:11:58,800 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:11:58,800 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:58,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:11:58,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:11:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1014296481, now seen corresponding path program 1 times [2021-10-28 09:11:58,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:58,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397948840] [2021-10-28 09:11:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:58,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:58,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:58,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397948840] [2021-10-28 09:11:58,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397948840] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:11:58,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:11:58,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:11:58,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237128363] [2021-10-28 09:11:58,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:11:58,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:11:58,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:11:58,930 INFO L87 Difference]: Start difference. First operand 235 states and 349 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:03,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:03,299 INFO L93 Difference]: Finished difference Result 376 states and 558 transitions. [2021-10-28 09:12:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-10-28 09:12:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:03,302 INFO L225 Difference]: With dead ends: 376 [2021-10-28 09:12:03,302 INFO L226 Difference]: Without dead ends: 251 [2021-10-28 09:12:03,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-28 09:12:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-28 09:12:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 348 transitions. [2021-10-28 09:12:03,314 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 348 transitions. Word has length 55 [2021-10-28 09:12:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:03,315 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 348 transitions. [2021-10-28 09:12:03,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 348 transitions. [2021-10-28 09:12:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 09:12:03,318 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:03,318 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:12:03,319 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1792231515, now seen corresponding path program 1 times [2021-10-28 09:12:03,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:03,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081785630] [2021-10-28 09:12:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:03,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:12:03,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:03,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081785630] [2021-10-28 09:12:03,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081785630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:03,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:03,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:03,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702793546] [2021-10-28 09:12:03,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:03,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:03,405 INFO L87 Difference]: Start difference. First operand 235 states and 348 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:07,745 INFO L93 Difference]: Finished difference Result 376 states and 556 transitions. [2021-10-28 09:12:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-10-28 09:12:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:07,748 INFO L225 Difference]: With dead ends: 376 [2021-10-28 09:12:07,749 INFO L226 Difference]: Without dead ends: 251 [2021-10-28 09:12:07,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-28 09:12:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-28 09:12:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.482905982905983) internal successors, (347), 234 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 347 transitions. [2021-10-28 09:12:07,788 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 347 transitions. Word has length 56 [2021-10-28 09:12:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:07,789 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 347 transitions. [2021-10-28 09:12:07,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 347 transitions. [2021-10-28 09:12:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 09:12:07,791 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:07,791 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:07,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:12:07,792 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1615585892, now seen corresponding path program 1 times [2021-10-28 09:12:07,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:07,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117763995] [2021-10-28 09:12:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:07,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:12:07,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:07,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117763995] [2021-10-28 09:12:07,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117763995] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:07,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:07,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:07,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894024982] [2021-10-28 09:12:07,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:07,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:07,882 INFO L87 Difference]: Start difference. First operand 235 states and 347 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:12,160 INFO L93 Difference]: Finished difference Result 367 states and 543 transitions. [2021-10-28 09:12:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:12,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-10-28 09:12:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:12,162 INFO L225 Difference]: With dead ends: 367 [2021-10-28 09:12:12,163 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 09:12:12,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 09:12:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2021-10-28 09:12:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4786324786324787) internal successors, (346), 234 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2021-10-28 09:12:12,172 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 57 [2021-10-28 09:12:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:12,172 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2021-10-28 09:12:12,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2021-10-28 09:12:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 09:12:12,174 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:12,174 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:12,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:12:12,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1711683715, now seen corresponding path program 1 times [2021-10-28 09:12:12,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:12,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356321565] [2021-10-28 09:12:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:12,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 09:12:12,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:12,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356321565] [2021-10-28 09:12:12,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356321565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:12,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:12,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:12:12,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368467877] [2021-10-28 09:12:12,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:12:12,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:12,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:12:12,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:12:12,263 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:14,333 INFO L93 Difference]: Finished difference Result 482 states and 714 transitions. [2021-10-28 09:12:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:12:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 57 [2021-10-28 09:12:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:14,336 INFO L225 Difference]: With dead ends: 482 [2021-10-28 09:12:14,336 INFO L226 Difference]: Without dead ends: 357 [2021-10-28 09:12:14,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:12:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-28 09:12:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2021-10-28 09:12:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.4691011235955056) internal successors, (523), 356 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 523 transitions. [2021-10-28 09:12:14,347 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 523 transitions. Word has length 57 [2021-10-28 09:12:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:14,347 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 523 transitions. [2021-10-28 09:12:14,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 523 transitions. [2021-10-28 09:12:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 09:12:14,348 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:14,348 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:14,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:12:14,348 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1773723329, now seen corresponding path program 1 times [2021-10-28 09:12:14,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:14,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871800917] [2021-10-28 09:12:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:14,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:12:14,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:14,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871800917] [2021-10-28 09:12:14,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871800917] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:14,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:14,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:12:14,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050599216] [2021-10-28 09:12:14,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:12:14,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:12:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:12:14,445 INFO L87 Difference]: Start difference. First operand 357 states and 523 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:16,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:16,496 INFO L93 Difference]: Finished difference Result 628 states and 919 transitions. [2021-10-28 09:12:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:12:16,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-10-28 09:12:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:16,500 INFO L225 Difference]: With dead ends: 628 [2021-10-28 09:12:16,500 INFO L226 Difference]: Without dead ends: 381 [2021-10-28 09:12:16,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:12:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-10-28 09:12:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2021-10-28 09:12:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.4605263157894737) internal successors, (555), 380 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 555 transitions. [2021-10-28 09:12:16,513 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 555 transitions. Word has length 57 [2021-10-28 09:12:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:16,513 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 555 transitions. [2021-10-28 09:12:16,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 555 transitions. [2021-10-28 09:12:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-28 09:12:16,515 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:16,515 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:16,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:12:16,516 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1922596163, now seen corresponding path program 1 times [2021-10-28 09:12:16,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:16,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043832403] [2021-10-28 09:12:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:16,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 09:12:16,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:16,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043832403] [2021-10-28 09:12:16,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043832403] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:16,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:16,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:16,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566016487] [2021-10-28 09:12:16,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:16,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:16,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:16,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:16,637 INFO L87 Difference]: Start difference. First operand 381 states and 555 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:21,151 INFO L93 Difference]: Finished difference Result 1035 states and 1516 transitions. [2021-10-28 09:12:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 77 [2021-10-28 09:12:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:21,157 INFO L225 Difference]: With dead ends: 1035 [2021-10-28 09:12:21,157 INFO L226 Difference]: Without dead ends: 661 [2021-10-28 09:12:21,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-10-28 09:12:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 444. [2021-10-28 09:12:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.489841986455982) internal successors, (660), 443 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 660 transitions. [2021-10-28 09:12:21,177 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 660 transitions. Word has length 77 [2021-10-28 09:12:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:21,178 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 660 transitions. [2021-10-28 09:12:21,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 660 transitions. [2021-10-28 09:12:21,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-28 09:12:21,179 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:21,180 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:21,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:12:21,180 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:21,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:21,181 INFO L85 PathProgramCache]: Analyzing trace with hash -126791679, now seen corresponding path program 1 times [2021-10-28 09:12:21,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:21,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557906946] [2021-10-28 09:12:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:21,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 09:12:21,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:21,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557906946] [2021-10-28 09:12:21,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557906946] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:21,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:21,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:21,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504777965] [2021-10-28 09:12:21,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:21,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:21,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:21,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:21,260 INFO L87 Difference]: Start difference. First operand 444 states and 660 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:25,568 INFO L93 Difference]: Finished difference Result 1021 states and 1516 transitions. [2021-10-28 09:12:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:25,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 77 [2021-10-28 09:12:25,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:25,573 INFO L225 Difference]: With dead ends: 1021 [2021-10-28 09:12:25,573 INFO L226 Difference]: Without dead ends: 584 [2021-10-28 09:12:25,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-10-28 09:12:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 510. [2021-10-28 09:12:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5206286836935168) internal successors, (774), 509 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 774 transitions. [2021-10-28 09:12:25,595 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 774 transitions. Word has length 77 [2021-10-28 09:12:25,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:25,595 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 774 transitions. [2021-10-28 09:12:25,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:25,596 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 774 transitions. [2021-10-28 09:12:25,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-28 09:12:25,598 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:25,598 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:25,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 09:12:25,598 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash 416305772, now seen corresponding path program 1 times [2021-10-28 09:12:25,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:25,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956263629] [2021-10-28 09:12:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:25,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 09:12:25,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:25,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956263629] [2021-10-28 09:12:25,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956263629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:25,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:25,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:25,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909855601] [2021-10-28 09:12:25,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:25,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:25,702 INFO L87 Difference]: Start difference. First operand 510 states and 774 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:30,028 INFO L93 Difference]: Finished difference Result 1084 states and 1624 transitions. [2021-10-28 09:12:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 92 [2021-10-28 09:12:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:30,033 INFO L225 Difference]: With dead ends: 1084 [2021-10-28 09:12:30,033 INFO L226 Difference]: Without dead ends: 581 [2021-10-28 09:12:30,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-28 09:12:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-28 09:12:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5147347740667976) internal successors, (771), 509 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 771 transitions. [2021-10-28 09:12:30,052 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 771 transitions. Word has length 92 [2021-10-28 09:12:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:30,053 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 771 transitions. [2021-10-28 09:12:30,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 771 transitions. [2021-10-28 09:12:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-28 09:12:30,055 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:30,055 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:30,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 09:12:30,056 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash 397650314, now seen corresponding path program 1 times [2021-10-28 09:12:30,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:30,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792013349] [2021-10-28 09:12:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:30,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 09:12:30,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:30,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792013349] [2021-10-28 09:12:30,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792013349] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:30,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:30,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:30,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756065740] [2021-10-28 09:12:30,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:30,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:30,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:30,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:30,151 INFO L87 Difference]: Start difference. First operand 510 states and 771 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:34,496 INFO L93 Difference]: Finished difference Result 1084 states and 1618 transitions. [2021-10-28 09:12:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:34,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 92 [2021-10-28 09:12:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:34,501 INFO L225 Difference]: With dead ends: 1084 [2021-10-28 09:12:34,501 INFO L226 Difference]: Without dead ends: 581 [2021-10-28 09:12:34,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-28 09:12:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-28 09:12:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5088408644400786) internal successors, (768), 509 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 768 transitions. [2021-10-28 09:12:34,521 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 768 transitions. Word has length 92 [2021-10-28 09:12:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:34,521 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 768 transitions. [2021-10-28 09:12:34,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 768 transitions. [2021-10-28 09:12:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-28 09:12:34,523 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:34,524 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:34,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 09:12:34,524 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:34,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:34,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1569413781, now seen corresponding path program 1 times [2021-10-28 09:12:34,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:34,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892060188] [2021-10-28 09:12:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:34,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 09:12:34,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:34,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892060188] [2021-10-28 09:12:34,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892060188] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:34,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:34,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:34,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001366792] [2021-10-28 09:12:34,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:34,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:34,637 INFO L87 Difference]: Start difference. First operand 510 states and 768 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:38,954 INFO L93 Difference]: Finished difference Result 1084 states and 1612 transitions. [2021-10-28 09:12:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 93 [2021-10-28 09:12:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:38,958 INFO L225 Difference]: With dead ends: 1084 [2021-10-28 09:12:38,959 INFO L226 Difference]: Without dead ends: 581 [2021-10-28 09:12:38,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-28 09:12:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-28 09:12:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5029469548133596) internal successors, (765), 509 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 765 transitions. [2021-10-28 09:12:38,978 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 765 transitions. Word has length 93 [2021-10-28 09:12:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:38,978 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 765 transitions. [2021-10-28 09:12:38,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 765 transitions. [2021-10-28 09:12:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 09:12:38,981 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:38,981 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:38,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 09:12:38,981 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash 993375279, now seen corresponding path program 1 times [2021-10-28 09:12:38,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:38,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781404041] [2021-10-28 09:12:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:38,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 09:12:39,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:39,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781404041] [2021-10-28 09:12:39,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781404041] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:39,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:39,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:39,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714851539] [2021-10-28 09:12:39,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:39,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:39,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:39,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:39,066 INFO L87 Difference]: Start difference. First operand 510 states and 765 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:43,407 INFO L93 Difference]: Finished difference Result 1084 states and 1606 transitions. [2021-10-28 09:12:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:43,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 94 [2021-10-28 09:12:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:43,411 INFO L225 Difference]: With dead ends: 1084 [2021-10-28 09:12:43,411 INFO L226 Difference]: Without dead ends: 581 [2021-10-28 09:12:43,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-28 09:12:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-28 09:12:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4970530451866404) internal successors, (762), 509 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 762 transitions. [2021-10-28 09:12:43,431 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 762 transitions. Word has length 94 [2021-10-28 09:12:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:43,432 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 762 transitions. [2021-10-28 09:12:43,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 762 transitions. [2021-10-28 09:12:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 09:12:43,434 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:43,434 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:43,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 09:12:43,435 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2070050586, now seen corresponding path program 1 times [2021-10-28 09:12:43,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:43,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790063078] [2021-10-28 09:12:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:43,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 09:12:43,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:43,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790063078] [2021-10-28 09:12:43,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790063078] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:43,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:43,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:43,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071925334] [2021-10-28 09:12:43,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:43,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:43,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:43,546 INFO L87 Difference]: Start difference. First operand 510 states and 762 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:47,799 INFO L93 Difference]: Finished difference Result 1057 states and 1567 transitions. [2021-10-28 09:12:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-10-28 09:12:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:47,803 INFO L225 Difference]: With dead ends: 1057 [2021-10-28 09:12:47,804 INFO L226 Difference]: Without dead ends: 554 [2021-10-28 09:12:47,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-10-28 09:12:47,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 510. [2021-10-28 09:12:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4911591355599214) internal successors, (759), 509 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 759 transitions. [2021-10-28 09:12:47,823 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 759 transitions. Word has length 95 [2021-10-28 09:12:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:47,824 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 759 transitions. [2021-10-28 09:12:47,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 759 transitions. [2021-10-28 09:12:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 09:12:47,826 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:47,826 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:47,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 09:12:47,826 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2066779273, now seen corresponding path program 1 times [2021-10-28 09:12:47,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:47,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938286793] [2021-10-28 09:12:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:47,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 09:12:47,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:47,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938286793] [2021-10-28 09:12:47,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938286793] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:47,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:47,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:47,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698614441] [2021-10-28 09:12:47,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:47,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:47,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:47,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:47,897 INFO L87 Difference]: Start difference. First operand 510 states and 759 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:52,189 INFO L93 Difference]: Finished difference Result 1057 states and 1561 transitions. [2021-10-28 09:12:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-10-28 09:12:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:52,193 INFO L225 Difference]: With dead ends: 1057 [2021-10-28 09:12:52,193 INFO L226 Difference]: Without dead ends: 554 [2021-10-28 09:12:52,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-10-28 09:12:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 510. [2021-10-28 09:12:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4852652259332024) internal successors, (756), 509 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 756 transitions. [2021-10-28 09:12:52,213 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 756 transitions. Word has length 95 [2021-10-28 09:12:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:52,213 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 756 transitions. [2021-10-28 09:12:52,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 756 transitions. [2021-10-28 09:12:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-28 09:12:52,215 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:52,216 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:52,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 09:12:52,216 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:52,217 INFO L85 PathProgramCache]: Analyzing trace with hash 952822956, now seen corresponding path program 1 times [2021-10-28 09:12:52,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:52,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369889773] [2021-10-28 09:12:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:52,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 09:12:52,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:52,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369889773] [2021-10-28 09:12:52,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369889773] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:52,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:52,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:12:52,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219590830] [2021-10-28 09:12:52,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:12:52,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:52,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:12:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:12:52,300 INFO L87 Difference]: Start difference. First operand 510 states and 756 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:56,565 INFO L93 Difference]: Finished difference Result 1045 states and 1539 transitions. [2021-10-28 09:12:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:12:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 96 [2021-10-28 09:12:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:56,570 INFO L225 Difference]: With dead ends: 1045 [2021-10-28 09:12:56,570 INFO L226 Difference]: Without dead ends: 542 [2021-10-28 09:12:56,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-10-28 09:12:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 510. [2021-10-28 09:12:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4793713163064832) internal successors, (753), 509 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 753 transitions. [2021-10-28 09:12:56,591 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 753 transitions. Word has length 96 [2021-10-28 09:12:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:56,591 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 753 transitions. [2021-10-28 09:12:56,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 753 transitions. [2021-10-28 09:12:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-28 09:12:56,594 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:56,594 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:56,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 09:12:56,594 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1844388260, now seen corresponding path program 1 times [2021-10-28 09:12:56,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:56,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026182367] [2021-10-28 09:12:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:56,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:12:56,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:56,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026182367] [2021-10-28 09:12:56,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026182367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:56,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:56,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:12:56,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939881169] [2021-10-28 09:12:56,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:12:56,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:12:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:12:56,664 INFO L87 Difference]: Start difference. First operand 510 states and 753 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:58,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:58,726 INFO L93 Difference]: Finished difference Result 1032 states and 1526 transitions. [2021-10-28 09:12:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:12:58,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 98 [2021-10-28 09:12:58,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:58,731 INFO L225 Difference]: With dead ends: 1032 [2021-10-28 09:12:58,731 INFO L226 Difference]: Without dead ends: 675 [2021-10-28 09:12:58,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:12:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-10-28 09:12:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 673. [2021-10-28 09:12:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.4776785714285714) internal successors, (993), 672 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 993 transitions. [2021-10-28 09:12:58,752 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 993 transitions. Word has length 98 [2021-10-28 09:12:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:58,753 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 993 transitions. [2021-10-28 09:12:58,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 993 transitions. [2021-10-28 09:12:58,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-28 09:12:58,755 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:58,755 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:58,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 09:12:58,756 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1703839650, now seen corresponding path program 1 times [2021-10-28 09:12:58,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:58,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220480751] [2021-10-28 09:12:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:58,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 09:12:58,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:58,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220480751] [2021-10-28 09:12:58,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220480751] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:58,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:58,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:12:58,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517739258] [2021-10-28 09:12:58,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:12:58,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:58,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:12:58,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:12:58,825 INFO L87 Difference]: Start difference. First operand 673 states and 993 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:00,882 INFO L93 Difference]: Finished difference Result 1191 states and 1757 transitions. [2021-10-28 09:13:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:13:00,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-10-28 09:13:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:00,887 INFO L225 Difference]: With dead ends: 1191 [2021-10-28 09:13:00,887 INFO L226 Difference]: Without dead ends: 671 [2021-10-28 09:13:00,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:13:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-10-28 09:13:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-10-28 09:13:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.4701492537313432) internal successors, (985), 670 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 985 transitions. [2021-10-28 09:13:00,924 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 985 transitions. Word has length 98 [2021-10-28 09:13:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:00,924 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 985 transitions. [2021-10-28 09:13:00,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 985 transitions. [2021-10-28 09:13:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-28 09:13:00,927 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:00,927 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:00,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 09:13:00,927 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1223162519, now seen corresponding path program 1 times [2021-10-28 09:13:00,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:00,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11593411] [2021-10-28 09:13:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:00,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:13:01,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:01,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11593411] [2021-10-28 09:13:01,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11593411] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:13:01,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:13:01,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:13:01,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274906643] [2021-10-28 09:13:01,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:13:01,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:13:01,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:13:01,015 INFO L87 Difference]: Start difference. First operand 671 states and 985 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:05,325 INFO L93 Difference]: Finished difference Result 1492 states and 2185 transitions. [2021-10-28 09:13:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:13:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 100 [2021-10-28 09:13:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:05,331 INFO L225 Difference]: With dead ends: 1492 [2021-10-28 09:13:05,332 INFO L226 Difference]: Without dead ends: 828 [2021-10-28 09:13:05,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:13:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-10-28 09:13:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 743. [2021-10-28 09:13:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4973045822102427) internal successors, (1111), 742 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1111 transitions. [2021-10-28 09:13:05,357 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1111 transitions. Word has length 100 [2021-10-28 09:13:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:05,358 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1111 transitions. [2021-10-28 09:13:05,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1111 transitions. [2021-10-28 09:13:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-28 09:13:05,360 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:05,361 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:05,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 09:13:05,361 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash -517718612, now seen corresponding path program 1 times [2021-10-28 09:13:05,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:05,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843501275] [2021-10-28 09:13:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:05,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:13:05,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:05,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843501275] [2021-10-28 09:13:05,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843501275] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:13:05,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:13:05,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:13:05,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025414577] [2021-10-28 09:13:05,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:13:05,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:05,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:13:05,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:13:05,443 INFO L87 Difference]: Start difference. First operand 743 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:09,743 INFO L93 Difference]: Finished difference Result 1561 states and 2305 transitions. [2021-10-28 09:13:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:13:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 115 [2021-10-28 09:13:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:09,750 INFO L225 Difference]: With dead ends: 1561 [2021-10-28 09:13:09,750 INFO L226 Difference]: Without dead ends: 825 [2021-10-28 09:13:09,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:13:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-28 09:13:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-28 09:13:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4932614555256065) internal successors, (1108), 742 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1108 transitions. [2021-10-28 09:13:09,778 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1108 transitions. Word has length 115 [2021-10-28 09:13:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:09,779 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1108 transitions. [2021-10-28 09:13:09,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1108 transitions. [2021-10-28 09:13:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-28 09:13:09,782 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:09,782 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:09,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 09:13:09,782 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:09,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:09,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1265744566, now seen corresponding path program 1 times [2021-10-28 09:13:09,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:09,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127044742] [2021-10-28 09:13:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:09,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:13:09,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:09,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127044742] [2021-10-28 09:13:09,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127044742] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:13:09,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:13:09,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:13:09,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392526330] [2021-10-28 09:13:09,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:13:09,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:09,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:13:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:13:09,916 INFO L87 Difference]: Start difference. First operand 743 states and 1108 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:14,188 INFO L93 Difference]: Finished difference Result 1561 states and 2299 transitions. [2021-10-28 09:13:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:13:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 115 [2021-10-28 09:13:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:14,193 INFO L225 Difference]: With dead ends: 1561 [2021-10-28 09:13:14,193 INFO L226 Difference]: Without dead ends: 825 [2021-10-28 09:13:14,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:13:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-28 09:13:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-28 09:13:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4892183288409704) internal successors, (1105), 742 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1105 transitions. [2021-10-28 09:13:14,219 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1105 transitions. Word has length 115 [2021-10-28 09:13:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:14,219 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1105 transitions. [2021-10-28 09:13:14,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1105 transitions. [2021-10-28 09:13:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-28 09:13:14,222 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:14,222 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:14,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-28 09:13:14,223 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:14,223 INFO L85 PathProgramCache]: Analyzing trace with hash -849536469, now seen corresponding path program 1 times [2021-10-28 09:13:14,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:14,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610267011] [2021-10-28 09:13:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:14,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:13:14,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:14,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610267011] [2021-10-28 09:13:14,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610267011] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:13:14,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:13:14,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:13:14,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404695935] [2021-10-28 09:13:14,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:13:14,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:14,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:13:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:13:14,302 INFO L87 Difference]: Start difference. First operand 743 states and 1105 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:18,643 INFO L93 Difference]: Finished difference Result 1561 states and 2293 transitions. [2021-10-28 09:13:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:13:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 116 [2021-10-28 09:13:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:18,649 INFO L225 Difference]: With dead ends: 1561 [2021-10-28 09:13:18,649 INFO L226 Difference]: Without dead ends: 825 [2021-10-28 09:13:18,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:13:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-28 09:13:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-28 09:13:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4851752021563343) internal successors, (1102), 742 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1102 transitions. [2021-10-28 09:13:18,678 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1102 transitions. Word has length 116 [2021-10-28 09:13:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:18,678 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1102 transitions. [2021-10-28 09:13:18,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1102 transitions. [2021-10-28 09:13:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-28 09:13:18,681 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:18,681 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:18,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-28 09:13:18,682 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:18,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1134529903, now seen corresponding path program 1 times [2021-10-28 09:13:18,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:18,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188240473] [2021-10-28 09:13:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:18,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:13:18,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:18,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188240473] [2021-10-28 09:13:18,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188240473] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:13:18,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:13:18,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:13:18,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92302344] [2021-10-28 09:13:18,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:13:18,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:18,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:13:18,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:13:18,776 INFO L87 Difference]: Start difference. First operand 743 states and 1102 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:23,090 INFO L93 Difference]: Finished difference Result 1561 states and 2287 transitions. [2021-10-28 09:13:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:13:23,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 117 [2021-10-28 09:13:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:23,095 INFO L225 Difference]: With dead ends: 1561 [2021-10-28 09:13:23,095 INFO L226 Difference]: Without dead ends: 825 [2021-10-28 09:13:23,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:13:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-28 09:13:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-28 09:13:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4811320754716981) internal successors, (1099), 742 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1099 transitions. [2021-10-28 09:13:23,128 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1099 transitions. Word has length 117 [2021-10-28 09:13:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:23,128 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1099 transitions. [2021-10-28 09:13:23,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1099 transitions. [2021-10-28 09:13:23,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 09:13:23,132 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:23,132 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:23,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-28 09:13:23,132 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:23,134 INFO L85 PathProgramCache]: Analyzing trace with hash 182595248, now seen corresponding path program 1 times [2021-10-28 09:13:23,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:23,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751600076] [2021-10-28 09:13:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:23,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:13:23,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:23,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751600076] [2021-10-28 09:13:23,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751600076] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:13:23,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:13:23,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:13:23,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689565378] [2021-10-28 09:13:23,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:13:23,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:13:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:13:23,246 INFO L87 Difference]: Start difference. First operand 743 states and 1099 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:27,519 INFO L93 Difference]: Finished difference Result 1534 states and 2248 transitions. [2021-10-28 09:13:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:13:27,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 118 [2021-10-28 09:13:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:27,524 INFO L225 Difference]: With dead ends: 1534 [2021-10-28 09:13:27,524 INFO L226 Difference]: Without dead ends: 798 [2021-10-28 09:13:27,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:13:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-10-28 09:13:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 743. [2021-10-28 09:13:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.477088948787062) internal successors, (1096), 742 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1096 transitions. [2021-10-28 09:13:27,547 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1096 transitions. Word has length 118 [2021-10-28 09:13:27,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:27,548 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1096 transitions. [2021-10-28 09:13:27,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1096 transitions. [2021-10-28 09:13:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 09:13:27,550 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:27,551 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:27,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-28 09:13:27,551 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:27,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1828816845, now seen corresponding path program 1 times [2021-10-28 09:13:27,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:27,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071915406] [2021-10-28 09:13:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:27,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 133 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:13:27,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:27,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071915406] [2021-10-28 09:13:27,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071915406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:13:27,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931738131] [2021-10-28 09:13:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:27,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:13:27,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:13:27,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:13:27,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:13:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:27,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:13:27,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:13:28,028 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:13:28,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:13:28,293 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:13:28,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:13:28,450 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:13:28,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:13:28,597 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:13:28,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:13:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 113 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-10-28 09:13:28,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931738131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:13:28,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:13:28,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-10-28 09:13:28,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606476196] [2021-10-28 09:13:28,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:13:28,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:13:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:13:28,700 INFO L87 Difference]: Start difference. First operand 743 states and 1096 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:45,056 INFO L93 Difference]: Finished difference Result 2253 states and 3254 transitions. [2021-10-28 09:13:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:13:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 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 118 [2021-10-28 09:13:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:45,066 INFO L225 Difference]: With dead ends: 2253 [2021-10-28 09:13:45,066 INFO L226 Difference]: Without dead ends: 1517 [2021-10-28 09:13:45,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:13:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-10-28 09:13:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1303. [2021-10-28 09:13:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 1.4746543778801844) internal successors, (1920), 1302 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1920 transitions. [2021-10-28 09:13:45,109 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1920 transitions. Word has length 118 [2021-10-28 09:13:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:45,109 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 1920 transitions. [2021-10-28 09:13:45,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1920 transitions. [2021-10-28 09:13:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-28 09:13:45,113 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:45,113 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:45,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:13:45,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:13:45,340 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash 467198890, now seen corresponding path program 1 times [2021-10-28 09:13:45,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:45,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309042142] [2021-10-28 09:13:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:45,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-28 09:13:45,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:45,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309042142] [2021-10-28 09:13:45,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309042142] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:13:45,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:13:45,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:13:45,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550112702] [2021-10-28 09:13:45,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:13:45,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:13:45,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:13:45,439 INFO L87 Difference]: Start difference. First operand 1303 states and 1920 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:49,816 INFO L93 Difference]: Finished difference Result 2700 states and 3962 transitions. [2021-10-28 09:13:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:13:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 119 [2021-10-28 09:13:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:49,824 INFO L225 Difference]: With dead ends: 2700 [2021-10-28 09:13:49,825 INFO L226 Difference]: Without dead ends: 1404 [2021-10-28 09:13:49,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:13:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-10-28 09:13:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1317. [2021-10-28 09:13:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 1.4817629179331306) internal successors, (1950), 1316 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1950 transitions. [2021-10-28 09:13:49,870 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1950 transitions. Word has length 119 [2021-10-28 09:13:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:49,870 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 1950 transitions. [2021-10-28 09:13:49,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1950 transitions. [2021-10-28 09:13:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-28 09:13:49,875 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:49,875 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:49,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-28 09:13:49,876 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1731483519, now seen corresponding path program 1 times [2021-10-28 09:13:49,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:49,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357888509] [2021-10-28 09:13:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:49,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-28 09:13:49,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:49,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357888509] [2021-10-28 09:13:49,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357888509] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:13:49,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:13:49,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:13:49,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041153774] [2021-10-28 09:13:49,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:13:49,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:49,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:13:49,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:13:49,954 INFO L87 Difference]: Start difference. First operand 1317 states and 1950 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:54,435 INFO L93 Difference]: Finished difference Result 2894 states and 4266 transitions. [2021-10-28 09:13:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:13:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 120 [2021-10-28 09:13:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:54,444 INFO L225 Difference]: With dead ends: 2894 [2021-10-28 09:13:54,444 INFO L226 Difference]: Without dead ends: 1584 [2021-10-28 09:13:54,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:13:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-10-28 09:13:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1321. [2021-10-28 09:13:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 1.4803030303030302) internal successors, (1954), 1320 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1954 transitions. [2021-10-28 09:13:54,523 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1954 transitions. Word has length 120 [2021-10-28 09:13:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:54,523 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1954 transitions. [2021-10-28 09:13:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1954 transitions. [2021-10-28 09:13:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-28 09:13:54,527 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:54,527 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:54,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-28 09:13:54,528 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1820752595, now seen corresponding path program 1 times [2021-10-28 09:13:54,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:54,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439687537] [2021-10-28 09:13:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:54,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:13:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-10-28 09:13:54,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:13:54,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439687537] [2021-10-28 09:13:54,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439687537] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:13:54,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:13:54,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:13:54,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155868686] [2021-10-28 09:13:54,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:13:54,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:13:54,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:13:54,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:13:54,755 INFO L87 Difference]: Start difference. First operand 1321 states and 1954 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:13:56,983 INFO L93 Difference]: Finished difference Result 2639 states and 3902 transitions. [2021-10-28 09:13:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:13:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 122 [2021-10-28 09:13:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:13:57,004 INFO L225 Difference]: With dead ends: 2639 [2021-10-28 09:13:57,005 INFO L226 Difference]: Without dead ends: 1325 [2021-10-28 09:13:57,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:13:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-10-28 09:13:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1324. [2021-10-28 09:13:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 1.4792139077853363) internal successors, (1957), 1323 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1957 transitions. [2021-10-28 09:13:57,046 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1957 transitions. Word has length 122 [2021-10-28 09:13:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:13:57,046 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 1957 transitions. [2021-10-28 09:13:57,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:13:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1957 transitions. [2021-10-28 09:13:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-28 09:13:57,050 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:13:57,050 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:57,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-28 09:13:57,050 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:13:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:13:57,051 INFO L85 PathProgramCache]: Analyzing trace with hash -272550210, now seen corresponding path program 1 times [2021-10-28 09:13:57,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:13:57,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487810731] [2021-10-28 09:13:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:13:57,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:13:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:13:57,469 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:13:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:13:57,889 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:13:57,890 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:13:57,891 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:13:57,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 09:13:57,897 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:13:57,900 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:13:58,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:13:58 BoogieIcfgContainer [2021-10-28 09:13:58,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:13:58,022 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:13:58,023 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:13:58,023 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:13:58,023 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:11:43" (3/4) ... [2021-10-28 09:13:58,029 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:13:58,030 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:13:58,031 INFO L168 Benchmark]: Toolchain (without parser) took 138581.11 ms. Allocated memory was 83.9 MB in the beginning and 144.7 MB in the end (delta: 60.8 MB). Free memory was 46.4 MB in the beginning and 48.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 57.7 MB. Max. memory is 16.1 GB. [2021-10-28 09:13:58,032 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:13:58,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.99 ms. Allocated memory is still 83.9 MB. Free memory was 46.2 MB in the beginning and 41.1 MB in the end (delta: 5.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:13:58,032 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.33 ms. Allocated memory is still 83.9 MB. Free memory was 41.1 MB in the beginning and 36.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:13:58,033 INFO L168 Benchmark]: Boogie Preprocessor took 150.16 ms. Allocated memory is still 83.9 MB. Free memory was 36.4 MB in the beginning and 54.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:13:58,033 INFO L168 Benchmark]: RCFGBuilder took 3488.13 ms. Allocated memory was 83.9 MB in the beginning and 117.4 MB in the end (delta: 33.6 MB). Free memory was 54.6 MB in the beginning and 88.6 MB in the end (delta: -34.1 MB). Peak memory consumption was 46.8 MB. Max. memory is 16.1 GB. [2021-10-28 09:13:58,033 INFO L168 Benchmark]: TraceAbstraction took 134120.66 ms. Allocated memory was 117.4 MB in the beginning and 144.7 MB in the end (delta: 27.3 MB). Free memory was 87.7 MB in the beginning and 48.9 MB in the end (delta: 38.8 MB). Peak memory consumption was 89.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:13:58,034 INFO L168 Benchmark]: Witness Printer took 7.56 ms. Allocated memory is still 144.7 MB. Free memory is still 48.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:13:58,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 718.99 ms. Allocated memory is still 83.9 MB. Free memory was 46.2 MB in the beginning and 41.1 MB in the end (delta: 5.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 86.33 ms. Allocated memory is still 83.9 MB. Free memory was 41.1 MB in the beginning and 36.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 150.16 ms. Allocated memory is still 83.9 MB. Free memory was 36.4 MB in the beginning and 54.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3488.13 ms. Allocated memory was 83.9 MB in the beginning and 117.4 MB in the end (delta: 33.6 MB). Free memory was 54.6 MB in the beginning and 88.6 MB in the end (delta: -34.1 MB). Peak memory consumption was 46.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 134120.66 ms. Allocated memory was 117.4 MB in the beginning and 144.7 MB in the end (delta: 27.3 MB). Free memory was 87.7 MB in the beginning and 48.9 MB in the end (delta: 38.8 MB). Peak memory consumption was 89.9 MB. Max. memory is 16.1 GB. * Witness Printer took 7.56 ms. Allocated memory is still 144.7 MB. Free memory is still 48.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1658]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 1343. Possible FailurePath: [L1042] static int init = 1; [L1043] static SSL_METHOD SSLv3_client_data ; VAL [init=1, SSLv3_client_data={8:0}] [L1065] SSL *s ; [L1069] s = malloc (sizeof (SSL)) [L1070] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1071] EXPR s->s3 [L1071] s->s3->flags = __VERIFIER_nondet_long() [L1072] EXPR s->s3 [L1072] (s->s3)->tmp.cert_req = __VERIFIER_nondet_int() [L1073] EXPR s->s3 [L1073] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1074] EXPR s->s3 [L1074] EXPR (s->s3)->tmp.new_cipher [L1074] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1075] EXPR s->s3 [L1075] s->s3->tmp.next_state = __VERIFIER_nondet_int() [L1076] s->bbio = (BIO *) __VERIFIER_nondet_ulong() [L1077] s->wbio = (BIO *) __VERIFIER_nondet_ulong() [L1078] s->ctx = malloc(sizeof(SSL_CTX)) [L1079] EXPR s->ctx [L1079] (s->ctx)->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1080] s->state = 12292 [L1081] s->version = __VERIFIER_nondet_int() [L1082] s->init_buf = (BUF_MEM *)__VERIFIER_nondet_ulong() [L1083] s->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1090] BUF_MEM *buf = (BUF_MEM *)__VERIFIER_nondet_ulong(); [L1091] unsigned long tmp ; [L1092] unsigned long l ; [L1093] long num1 ; [L1094] void (*cb)() ; [L1095] int ret ; [L1096] int new_state ; [L1097] int state ; [L1098] int skip ; [L1099] int *tmp___0 ; [L1100] int tmp___1 = __VERIFIER_nondet_int(); [L1101] int tmp___2 = __VERIFIER_nondet_int(); [L1102] int tmp___3 ; [L1103] int tmp___4 ; [L1104] int tmp___5 ; [L1105] int tmp___6 ; [L1106] int tmp___7 ; [L1107] int tmp___8 ; [L1108] long tmp___9 ; [L1110] int blastFlag ; [L1113] blastFlag = 0 [L1114] s->state = 12292 [L1115] s->hit = __VERIFIER_nondet_int() [L1117] tmp = __VERIFIER_nondet_int() [L1118] cb = (void (*)())((void *)0) [L1119] ret = -1 [L1120] skip = 0 [L1121] tmp___0 = (int*)malloc(sizeof(int)) [L1122] *tmp___0 = 0 [L1123] EXPR s->info_callback VAL [init=1, SSLv3_client_data={8:0}] [L1123] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1124] EXPR s->info_callback [L1124] cb = s->info_callback [L1132] EXPR s->in_handshake [L1132] s->in_handshake += 1 [L1133] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND TRUE s->state == 12292 [L1249] s->new_session = 1 [L1250] s->state = 4096 [L1251] EXPR s->ctx [L1251] EXPR (s->ctx)->stats.sess_connect_renegotiate [L1251] (s->ctx)->stats.sess_connect_renegotiate += 1 [L1256] s->server = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1257] COND TRUE (unsigned long )cb != (unsigned long )((void *)0) VAL [init=1, SSLv3_client_data={8:0}] [L1262] EXPR s->version VAL [init=1, SSLv3_client_data={8:0}] [L1262] COND FALSE !((s->version & 65280) != 768) [L1268] s->type = 4096 [L1269] EXPR s->init_buf VAL [init=1, SSLv3_client_data={8:0}] [L1269] COND FALSE !((unsigned long )s->init_buf == (unsigned long )((void *)0)) [L1281] tmp___4 = __VERIFIER_nondet_int() [L1282] COND FALSE !(! tmp___4) [L1288] tmp___5 = __VERIFIER_nondet_int() [L1289] COND FALSE !(! tmp___5) [L1295] s->state = 4368 [L1296] EXPR s->ctx [L1296] EXPR (s->ctx)->stats.sess_connect [L1296] (s->ctx)->stats.sess_connect += 1 [L1297] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND TRUE s->state == 4368 [L1301] s->shutdown = 0 [L1302] ret = __VERIFIER_nondet_int() [L1303] COND TRUE blastFlag == 0 [L1304] blastFlag = 1 VAL [init=1, SSLv3_client_data={8:0}] [L1308] COND FALSE !(ret <= 0) [L1313] s->state = 4384 [L1314] s->init_num = 0 [L1315] EXPR s->bbio [L1315] EXPR s->wbio VAL [init=1, SSLv3_client_data={8:0}] [L1315] COND TRUE (unsigned long )s->bbio != (unsigned long )s->wbio [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND TRUE s->state == 4384 [L1323] ret = __VERIFIER_nondet_int() [L1324] COND TRUE blastFlag == 1 [L1325] blastFlag = 2 VAL [init=1, SSLv3_client_data={8:0}] [L1329] COND FALSE !(ret <= 0) [L1334] s->hit VAL [init=1, SSLv3_client_data={8:0}] [L1334] COND FALSE !(s->hit) [L1337] s->state = 4400 VAL [init=1, SSLv3_client_data={8:0}] [L1339] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND TRUE s->state == 4400 [L1343] EXPR s->s3 [L1343] EXPR (s->s3)->tmp.new_cipher [L1343] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_client_data={8:0}] [L1343] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1346] ret = __VERIFIER_nondet_int() [L1347] COND TRUE blastFlag == 2 [L1348] blastFlag = 3 VAL [init=1, SSLv3_client_data={8:0}] [L1352] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_client_data={8:0}] [L1358] s->state = 4416 [L1359] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1179] COND TRUE s->state == 4416 [L1363] ret = __VERIFIER_nondet_int() [L1364] COND TRUE blastFlag == 3 [L1365] blastFlag = 4 VAL [init=1, SSLv3_client_data={8:0}] [L1369] COND FALSE !(ret <= 0) [L1374] s->state = 4432 [L1375] s->init_num = 0 [L1376] tmp___6 = __VERIFIER_nondet_int() [L1377] COND FALSE !(! tmp___6) VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1185] COND TRUE s->state == 4432 [L1386] ret = __VERIFIER_nondet_int() [L1387] COND FALSE !(blastFlag == 5) VAL [init=1, SSLv3_client_data={8:0}] [L1392] COND FALSE !(ret <= 0) [L1397] s->state = 4448 [L1398] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1185] COND FALSE !(s->state == 4432) [L1188] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1188] COND FALSE !(s->state == 4433) [L1191] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1191] COND TRUE s->state == 4448 [L1402] ret = __VERIFIER_nondet_int() [L1403] COND TRUE blastFlag == 4 VAL [init=1, SSLv3_client_data={8:0}] [L1658] reach_error() VAL [init=1, SSLv3_client_data={8:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 131 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 133.9s, OverallIterations: 31, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 127.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6589 SDtfs, 1802 SDslu, 9494 SDs, 0 SdLazy, 5005 SolverSat, 177 SolverUnsat, 58 SolverUnknown, 0 SolverNotchecked, 123.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1324occurred in iteration=30, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 30 MinimizatonAttempts, 1818 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 2875 NumberOfCodeBlocks, 2875 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2707 ConstructedInterpolants, 0 QuantifiedInterpolants, 6410 SizeOfPredicates, 4 NumberOfNonLiveVariables, 517 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 31 InterpolantComputations, 29 PerfectInterpolantSequences, 3026/3066 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-28 09:13:58,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:14:00,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:14:00,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:14:00,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:14:00,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:14:00,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:14:00,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:14:00,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:14:00,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:14:00,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:14:00,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:14:00,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:14:00,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:14:00,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:14:00,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:14:00,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:14:00,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:14:00,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:14:00,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:14:00,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:14:00,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:14:00,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:14:00,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:14:00,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:14:00,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:14:00,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:14:00,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:14:00,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:14:00,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:14:00,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:14:00,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:14:00,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:14:00,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:14:00,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:14:00,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:14:00,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:14:00,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:14:00,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:14:00,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:14:00,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:14:00,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:14:00,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-28 09:14:00,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:14:00,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:14:00,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:14:00,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:14:00,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:14:00,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:14:00,708 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:14:00,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:14:00,708 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:14:00,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:14:00,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:14:00,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:14:00,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:14:00,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:14:00,710 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 09:14:00,710 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 09:14:00,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:14:00,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:14:00,711 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:14:00,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:14:00,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:14:00,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:14:00,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:14:00,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:14:00,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:14:00,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:14:00,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:14:00,716 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 09:14:00,716 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 09:14:00,716 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:14:00,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:14:00,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:14:00,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:14:00,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 09:14:00,718 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d053be7ac759c4172c4b0b5fbe009ed8f624c0c8659eb750e9996926d5d3b0a1 [2021-10-28 09:14:01,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:14:01,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:14:01,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:14:01,171 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:14:01,172 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:14:01,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loops/s3.i [2021-10-28 09:14:01,250 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data/06efdbcd4/668fb9202e574d5895c0f94c0f28bbbe/FLAG052769e89 [2021-10-28 09:14:01,926 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:14:01,927 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/sv-benchmarks/c/loops/s3.i [2021-10-28 09:14:01,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data/06efdbcd4/668fb9202e574d5895c0f94c0f28bbbe/FLAG052769e89 [2021-10-28 09:14:02,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/data/06efdbcd4/668fb9202e574d5895c0f94c0f28bbbe [2021-10-28 09:14:02,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:14:02,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:14:02,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:14:02,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:14:02,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:14:02,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:14:02" (1/1) ... [2021-10-28 09:14:02,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e9048d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:02, skipping insertion in model container [2021-10-28 09:14:02,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:14:02" (1/1) ... [2021-10-28 09:14:02,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:14:02,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:14:02,778 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-28 09:14:02,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:14:02,809 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:14:02,986 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-28 09:14:02,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:14:03,010 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:14:03,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03 WrapperNode [2021-10-28 09:14:03,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:14:03,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:14:03,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:14:03,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:14:03,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:14:03,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:14:03,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:14:03,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:14:03,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:14:03,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:14:03,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:14:03,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:14:03,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (1/1) ... [2021-10-28 09:14:03,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:14:03,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:14:03,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:14:03,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:14:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 09:14:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:14:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:14:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 09:14:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:14:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:14:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:14:03,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:14:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 09:14:03,481 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-28 09:14:08,360 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-28 09:14:08,361 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-28 09:14:08,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:14:08,388 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-28 09:14:08,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:14:08 BoogieIcfgContainer [2021-10-28 09:14:08,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:14:08,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:14:08,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:14:08,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:14:08,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:14:02" (1/3) ... [2021-10-28 09:14:08,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f8dfb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:14:08, skipping insertion in model container [2021-10-28 09:14:08,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:03" (2/3) ... [2021-10-28 09:14:08,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f8dfb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:14:08, skipping insertion in model container [2021-10-28 09:14:08,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:14:08" (3/3) ... [2021-10-28 09:14:08,404 INFO L111 eAbstractionObserver]: Analyzing ICFG s3.i [2021-10-28 09:14:08,410 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:14:08,411 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:14:08,484 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:14:08,489 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:14:08,489 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:14:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:14:08,517 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:14:08,517 INFO L513 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] [2021-10-28 09:14:08,518 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:14:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:14:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1457703967, now seen corresponding path program 1 times [2021-10-28 09:14:08,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:14:08,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457195953] [2021-10-28 09:14:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:14:08,538 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:14:08,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:14:08,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:14:08,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 09:14:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:14:08,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:14:08,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:14:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:14:09,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:14:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:14:09,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:14:09,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457195953] [2021-10-28 09:14:09,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457195953] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:14:09,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:14:09,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-28 09:14:09,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595469762] [2021-10-28 09:14:09,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:14:09,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:14:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:14:09,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:14:09,521 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:14:09,742 INFO L93 Difference]: Finished difference Result 375 states and 626 transitions. [2021-10-28 09:14:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:14:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2021-10-28 09:14:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:14:09,758 INFO L225 Difference]: With dead ends: 375 [2021-10-28 09:14:09,759 INFO L226 Difference]: Without dead ends: 217 [2021-10-28 09:14:09,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:14:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-28 09:14:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-10-28 09:14:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4814814814814814) internal successors, (320), 216 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 320 transitions. [2021-10-28 09:14:09,832 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 320 transitions. Word has length 24 [2021-10-28 09:14:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:14:09,833 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 320 transitions. [2021-10-28 09:14:09,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 320 transitions. [2021-10-28 09:14:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 09:14:09,839 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:14:09,839 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:14:09,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:14:10,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:14:10,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:14:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:14:10,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1495258694, now seen corresponding path program 1 times [2021-10-28 09:14:10,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:14:10,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636738024] [2021-10-28 09:14:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:14:10,060 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:14:10,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:14:10,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:14:10,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 09:14:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:14:10,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:14:10,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:14:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:14:10,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:14:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:14:11,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:14:11,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636738024] [2021-10-28 09:14:11,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636738024] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:14:11,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:14:11,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-28 09:14:11,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607474769] [2021-10-28 09:14:11,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:14:11,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:14:11,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:14:11,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:14:11,023 INFO L87 Difference]: Start difference. First operand 217 states and 320 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:14:13,380 INFO L93 Difference]: Finished difference Result 628 states and 933 transitions. [2021-10-28 09:14:13,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:14:13,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 41 [2021-10-28 09:14:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:14:13,387 INFO L225 Difference]: With dead ends: 628 [2021-10-28 09:14:13,387 INFO L226 Difference]: Without dead ends: 521 [2021-10-28 09:14:13,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:14:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-10-28 09:14:13,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 421. [2021-10-28 09:14:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.480952380952381) internal successors, (622), 420 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 622 transitions. [2021-10-28 09:14:13,450 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 622 transitions. Word has length 41 [2021-10-28 09:14:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:14:13,451 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 622 transitions. [2021-10-28 09:14:13,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 622 transitions. [2021-10-28 09:14:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-28 09:14:13,469 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:14:13,470 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:14:13,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-28 09:14:13,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:14:13,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:14:13,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:14:13,686 INFO L85 PathProgramCache]: Analyzing trace with hash 924360661, now seen corresponding path program 1 times [2021-10-28 09:14:13,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:14:13,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156326903] [2021-10-28 09:14:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:14:13,688 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:14:13,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:14:13,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:14:13,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 09:14:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:14:13,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:14:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:14:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 09:14:14,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:14:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 09:14:15,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:14:15,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156326903] [2021-10-28 09:14:15,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156326903] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:14:15,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:14:15,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-28 09:14:15,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531917955] [2021-10-28 09:14:15,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:14:15,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:14:15,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:14:15,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:14:15,063 INFO L87 Difference]: Start difference. First operand 421 states and 622 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:14:17,329 INFO L93 Difference]: Finished difference Result 939 states and 1394 transitions. [2021-10-28 09:14:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:14:17,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 80 [2021-10-28 09:14:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:14:17,335 INFO L225 Difference]: With dead ends: 939 [2021-10-28 09:14:17,335 INFO L226 Difference]: Without dead ends: 628 [2021-10-28 09:14:17,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:14:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-10-28 09:14:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2021-10-28 09:14:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.4784688995215312) internal successors, (927), 627 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 927 transitions. [2021-10-28 09:14:17,374 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 927 transitions. Word has length 80 [2021-10-28 09:14:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:14:17,375 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 927 transitions. [2021-10-28 09:14:17,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 927 transitions. [2021-10-28 09:14:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-28 09:14:17,380 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:14:17,380 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:14:17,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:14:17,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:14:17,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:14:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:14:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1855651051, now seen corresponding path program 1 times [2021-10-28 09:14:17,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:14:17,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151375531] [2021-10-28 09:14:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:14:17,595 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:14:17,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:14:17,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:14:17,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 09:14:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:14:18,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:14:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:14:18,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:14:18,339 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:14:18,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-28 09:14:18,832 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:14:18,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:14:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:14:19,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:14:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:14:19,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:14:19,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151375531] [2021-10-28 09:14:19,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151375531] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:14:19,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:14:19,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-10-28 09:14:19,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836155610] [2021-10-28 09:14:19,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:14:19,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:14:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:14:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:14:19,913 INFO L87 Difference]: Start difference. First operand 628 states and 927 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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) [2021-10-28 09:14:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:14:37,462 INFO L93 Difference]: Finished difference Result 2264 states and 3359 transitions. [2021-10-28 09:14:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:14:37,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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) Word has length 100 [2021-10-28 09:14:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:14:37,477 INFO L225 Difference]: With dead ends: 2264 [2021-10-28 09:14:37,478 INFO L226 Difference]: Without dead ends: 1643 [2021-10-28 09:14:37,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:14:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-10-28 09:14:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 753. [2021-10-28 09:14:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 1.5106382978723405) internal successors, (1136), 752 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1136 transitions. [2021-10-28 09:14:37,540 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1136 transitions. Word has length 100 [2021-10-28 09:14:37,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:14:37,541 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1136 transitions. [2021-10-28 09:14:37,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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) [2021-10-28 09:14:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1136 transitions. [2021-10-28 09:14:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-28 09:14:37,544 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:14:37,544 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:14:37,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:14:37,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:14:37,760 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:14:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:14:37,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1223162519, now seen corresponding path program 1 times [2021-10-28 09:14:37,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:14:37,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806736213] [2021-10-28 09:14:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:14:37,762 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:14:37,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:14:37,763 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:14:37,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 09:14:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:14:38,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:14:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:14:38,462 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:14:38,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:14:39,127 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:14:39,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:14:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:14:39,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:14:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:14:39,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:14:39,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806736213] [2021-10-28 09:14:39,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806736213] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:14:39,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:14:39,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-28 09:14:39,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005964266] [2021-10-28 09:14:39,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:14:39,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:14:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:14:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:14:39,694 INFO L87 Difference]: Start difference. First operand 753 states and 1136 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:14:49,883 INFO L93 Difference]: Finished difference Result 1757 states and 2634 transitions. [2021-10-28 09:14:49,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:14:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 100 [2021-10-28 09:14:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:14:49,898 INFO L225 Difference]: With dead ends: 1757 [2021-10-28 09:14:49,899 INFO L226 Difference]: Without dead ends: 1011 [2021-10-28 09:14:49,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:14:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-10-28 09:14:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 873. [2021-10-28 09:14:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5378440366972477) internal successors, (1341), 872 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1341 transitions. [2021-10-28 09:14:49,946 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1341 transitions. Word has length 100 [2021-10-28 09:14:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:14:49,946 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1341 transitions. [2021-10-28 09:14:49,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:14:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1341 transitions. [2021-10-28 09:14:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-28 09:14:49,950 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:14:49,950 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:14:49,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:14:50,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:14:50,166 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:14:50,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:14:50,166 INFO L85 PathProgramCache]: Analyzing trace with hash -517718612, now seen corresponding path program 1 times [2021-10-28 09:14:50,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:14:50,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625388649] [2021-10-28 09:14:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:14:50,168 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:14:50,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:14:50,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:14:50,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 09:14:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:14:50,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:14:50,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:14:51,132 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:14:51,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:14:51,365 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:14:51,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:14:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:14:51,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:14:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:14:52,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:14:52,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625388649] [2021-10-28 09:14:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625388649] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:14:52,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:14:52,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:14:52,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332887954] [2021-10-28 09:14:52,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:14:52,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:14:52,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:14:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:14:52,161 INFO L87 Difference]: Start difference. First operand 873 states and 1341 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:15:06,727 INFO L93 Difference]: Finished difference Result 2405 states and 3628 transitions. [2021-10-28 09:15:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:15:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 115 [2021-10-28 09:15:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:15:06,754 INFO L225 Difference]: With dead ends: 2405 [2021-10-28 09:15:06,755 INFO L226 Difference]: Without dead ends: 1539 [2021-10-28 09:15:06,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:15:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-10-28 09:15:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 931. [2021-10-28 09:15:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.5204301075268818) internal successors, (1414), 930 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1414 transitions. [2021-10-28 09:15:06,807 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1414 transitions. Word has length 115 [2021-10-28 09:15:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:15:06,807 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1414 transitions. [2021-10-28 09:15:06,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1414 transitions. [2021-10-28 09:15:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-28 09:15:06,810 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:15:06,811 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:15:06,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:15:07,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:15:07,027 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:15:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:15:07,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1265744566, now seen corresponding path program 1 times [2021-10-28 09:15:07,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:15:07,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599937480] [2021-10-28 09:15:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:15:07,028 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:15:07,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:15:07,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:15:07,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 09:15:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:15:07,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:15:07,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:15:07,934 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:15:07,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:15:08,173 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:15:08,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:15:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:15:08,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:15:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:15:08,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:15:08,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599937480] [2021-10-28 09:15:08,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599937480] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:15:08,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:15:08,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:15:08,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027218291] [2021-10-28 09:15:08,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:15:08,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:15:08,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:15:08,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:15:08,910 INFO L87 Difference]: Start difference. First operand 931 states and 1414 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:15:17,308 INFO L93 Difference]: Finished difference Result 2452 states and 3665 transitions. [2021-10-28 09:15:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:15:17,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 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 115 [2021-10-28 09:15:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:15:17,321 INFO L225 Difference]: With dead ends: 2452 [2021-10-28 09:15:17,321 INFO L226 Difference]: Without dead ends: 1531 [2021-10-28 09:15:17,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:15:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-10-28 09:15:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 936. [2021-10-28 09:15:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.5058823529411764) internal successors, (1408), 935 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1408 transitions. [2021-10-28 09:15:17,393 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1408 transitions. Word has length 115 [2021-10-28 09:15:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:15:17,394 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1408 transitions. [2021-10-28 09:15:17,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1408 transitions. [2021-10-28 09:15:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-28 09:15:17,398 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:15:17,398 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:15:17,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:15:17,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:15:17,614 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:15:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:15:17,615 INFO L85 PathProgramCache]: Analyzing trace with hash -647023955, now seen corresponding path program 1 times [2021-10-28 09:15:17,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:15:17,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277432812] [2021-10-28 09:15:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:15:17,615 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:15:17,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:15:17,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:15:17,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 09:15:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:15:18,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:15:18,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:15:18,492 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:15:18,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:15:18,871 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:15:18,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:15:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:15:19,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:15:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:15:19,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:15:19,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277432812] [2021-10-28 09:15:19,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277432812] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:15:19,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:15:19,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:15:19,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162217835] [2021-10-28 09:15:19,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:15:19,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:15:19,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:15:19,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:15:19,582 INFO L87 Difference]: Start difference. First operand 936 states and 1408 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:15:31,659 INFO L93 Difference]: Finished difference Result 2418 states and 3597 transitions. [2021-10-28 09:15:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:15:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 115 [2021-10-28 09:15:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:15:31,672 INFO L225 Difference]: With dead ends: 2418 [2021-10-28 09:15:31,672 INFO L226 Difference]: Without dead ends: 1650 [2021-10-28 09:15:31,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:15:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-10-28 09:15:31,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1052. [2021-10-28 09:15:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 1.5052331113225499) internal successors, (1582), 1051 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1582 transitions. [2021-10-28 09:15:31,741 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1582 transitions. Word has length 115 [2021-10-28 09:15:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:15:31,741 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1582 transitions. [2021-10-28 09:15:31,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1582 transitions. [2021-10-28 09:15:31,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-28 09:15:31,744 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:15:31,745 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:15:31,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:15:31,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:15:31,960 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:15:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:15:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash -849536469, now seen corresponding path program 1 times [2021-10-28 09:15:31,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:15:31,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680902096] [2021-10-28 09:15:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:15:31,961 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:15:31,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:15:31,962 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:15:31,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-28 09:15:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:15:32,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:15:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:15:32,943 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:15:32,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:15:33,193 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:15:33,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:15:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:15:33,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:15:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:15:33,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:15:33,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680902096] [2021-10-28 09:15:33,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680902096] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:15:33,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:15:33,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:15:33,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414234718] [2021-10-28 09:15:33,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:15:33,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:15:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:15:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:15:33,921 INFO L87 Difference]: Start difference. First operand 1052 states and 1582 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:15:45,695 INFO L93 Difference]: Finished difference Result 2669 states and 3951 transitions. [2021-10-28 09:15:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:15:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 116 [2021-10-28 09:15:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:15:45,707 INFO L225 Difference]: With dead ends: 2669 [2021-10-28 09:15:45,707 INFO L226 Difference]: Without dead ends: 1627 [2021-10-28 09:15:45,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:15:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-10-28 09:15:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1052. [2021-10-28 09:15:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 1.4843006660323501) internal successors, (1560), 1051 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1560 transitions. [2021-10-28 09:15:45,769 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1560 transitions. Word has length 116 [2021-10-28 09:15:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:15:45,769 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1560 transitions. [2021-10-28 09:15:45,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1560 transitions. [2021-10-28 09:15:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-28 09:15:45,772 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:15:45,773 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:15:45,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:15:45,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:15:45,988 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:15:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:15:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash -710278962, now seen corresponding path program 1 times [2021-10-28 09:15:45,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:15:45,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111257000] [2021-10-28 09:15:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:15:45,989 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:15:45,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:15:45,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:15:45,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-28 09:15:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:15:46,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:15:46,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:15:46,908 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:15:46,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:15:47,252 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:15:47,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:15:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:15:47,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:15:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:15:47,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:15:47,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111257000] [2021-10-28 09:15:47,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111257000] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:15:47,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:15:47,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:15:47,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042377200] [2021-10-28 09:15:47,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:15:47,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:15:47,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:15:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:15:47,945 INFO L87 Difference]: Start difference. First operand 1052 states and 1560 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:15:58,996 INFO L93 Difference]: Finished difference Result 2492 states and 3661 transitions. [2021-10-28 09:15:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:15:58,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 116 [2021-10-28 09:15:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:15:59,007 INFO L225 Difference]: With dead ends: 2492 [2021-10-28 09:15:59,007 INFO L226 Difference]: Without dead ends: 1628 [2021-10-28 09:15:59,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:15:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-10-28 09:15:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1068. [2021-10-28 09:15:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.4751640112464854) internal successors, (1574), 1067 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1574 transitions. [2021-10-28 09:15:59,063 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1574 transitions. Word has length 116 [2021-10-28 09:15:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:15:59,064 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1574 transitions. [2021-10-28 09:15:59,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:15:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1574 transitions. [2021-10-28 09:15:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-28 09:15:59,067 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:15:59,068 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:15:59,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-28 09:15:59,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:15:59,284 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:15:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:15:59,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1134529903, now seen corresponding path program 1 times [2021-10-28 09:15:59,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:15:59,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751937203] [2021-10-28 09:15:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:15:59,287 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:15:59,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:15:59,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:15:59,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-28 09:16:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:00,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:16:00,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:00,264 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:16:00,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:16:00,518 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:16:00,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:16:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:00,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:16:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:01,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:16:01,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751937203] [2021-10-28 09:16:01,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751937203] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:01,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:01,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:16:01,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163833851] [2021-10-28 09:16:01,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:16:01,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:16:01,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:16:01,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:16:01,149 INFO L87 Difference]: Start difference. First operand 1068 states and 1574 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:09,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:09,315 INFO L93 Difference]: Finished difference Result 2680 states and 3906 transitions. [2021-10-28 09:16:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:16:09,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 117 [2021-10-28 09:16:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:16:09,322 INFO L225 Difference]: With dead ends: 2680 [2021-10-28 09:16:09,323 INFO L226 Difference]: Without dead ends: 1627 [2021-10-28 09:16:09,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:16:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-10-28 09:16:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1068. [2021-10-28 09:16:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.4545454545454546) internal successors, (1552), 1067 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1552 transitions. [2021-10-28 09:16:09,381 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1552 transitions. Word has length 117 [2021-10-28 09:16:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:16:09,381 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1552 transitions. [2021-10-28 09:16:09,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1552 transitions. [2021-10-28 09:16:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 09:16:09,385 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:16:09,385 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:09,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:09,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:16:09,603 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:16:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash 182595248, now seen corresponding path program 1 times [2021-10-28 09:16:09,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:16:09,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205665121] [2021-10-28 09:16:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:09,604 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:16:09,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:16:09,605 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:16:09,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-28 09:16:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:16:10,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:10,639 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:16:10,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:16:10,912 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:16:10,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:16:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:11,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:16:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:11,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:16:11,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205665121] [2021-10-28 09:16:11,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205665121] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:11,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:11,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:16:11,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026790055] [2021-10-28 09:16:11,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:16:11,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:16:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:16:11,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:16:11,552 INFO L87 Difference]: Start difference. First operand 1068 states and 1552 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:19,106 INFO L93 Difference]: Finished difference Result 2632 states and 3802 transitions. [2021-10-28 09:16:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:16:19,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 118 [2021-10-28 09:16:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:16:19,116 INFO L225 Difference]: With dead ends: 2632 [2021-10-28 09:16:19,117 INFO L226 Difference]: Without dead ends: 1579 [2021-10-28 09:16:19,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:16:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-10-28 09:16:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1068. [2021-10-28 09:16:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.4329896907216495) internal successors, (1529), 1067 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1529 transitions. [2021-10-28 09:16:19,177 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1529 transitions. Word has length 118 [2021-10-28 09:16:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:16:19,177 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1529 transitions. [2021-10-28 09:16:19,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1529 transitions. [2021-10-28 09:16:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 09:16:19,181 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:16:19,181 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:19,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:19,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:16:19,407 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:16:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1828816845, now seen corresponding path program 1 times [2021-10-28 09:16:19,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:16:19,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167266123] [2021-10-28 09:16:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:19,408 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:16:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:16:19,409 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:16:19,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-28 09:16:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:20,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:16:20,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:20,422 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:16:20,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:16:20,741 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:16:20,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:16:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:20,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:16:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:21,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:16:21,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167266123] [2021-10-28 09:16:21,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167266123] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:21,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:21,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:16:21,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501006633] [2021-10-28 09:16:21,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:16:21,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:16:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:16:21,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:16:21,351 INFO L87 Difference]: Start difference. First operand 1068 states and 1529 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:29,599 INFO L93 Difference]: Finished difference Result 2732 states and 3892 transitions. [2021-10-28 09:16:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:16:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 118 [2021-10-28 09:16:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:16:29,628 INFO L225 Difference]: With dead ends: 2732 [2021-10-28 09:16:29,628 INFO L226 Difference]: Without dead ends: 1679 [2021-10-28 09:16:29,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:16:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-10-28 09:16:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1163. [2021-10-28 09:16:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 1.4139414802065404) internal successors, (1643), 1162 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1643 transitions. [2021-10-28 09:16:29,708 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1643 transitions. Word has length 118 [2021-10-28 09:16:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:16:29,708 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 1643 transitions. [2021-10-28 09:16:29,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1643 transitions. [2021-10-28 09:16:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-28 09:16:29,711 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:16:29,712 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:29,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:29,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:16:29,931 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:16:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1012937024, now seen corresponding path program 1 times [2021-10-28 09:16:29,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:16:29,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091617887] [2021-10-28 09:16:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:29,932 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:16:29,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:16:29,934 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:16:29,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-28 09:16:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:16:31,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:31,316 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:16:31,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:16:31,695 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:16:31,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:16:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:31,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:16:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:32,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:16:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091617887] [2021-10-28 09:16:32,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091617887] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:32,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:32,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:16:32,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578170844] [2021-10-28 09:16:32,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:16:32,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:16:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:16:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:16:32,346 INFO L87 Difference]: Start difference. First operand 1163 states and 1643 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:40,532 INFO L93 Difference]: Finished difference Result 2786 states and 3936 transitions. [2021-10-28 09:16:40,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:16:40,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 119 [2021-10-28 09:16:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:16:40,542 INFO L225 Difference]: With dead ends: 2786 [2021-10-28 09:16:40,543 INFO L226 Difference]: Without dead ends: 1638 [2021-10-28 09:16:40,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:16:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-10-28 09:16:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1179. [2021-10-28 09:16:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 1.4125636672325976) internal successors, (1664), 1178 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1664 transitions. [2021-10-28 09:16:40,618 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1664 transitions. Word has length 119 [2021-10-28 09:16:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:16:40,618 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1664 transitions. [2021-10-28 09:16:40,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1664 transitions. [2021-10-28 09:16:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-28 09:16:40,622 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:16:40,623 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:40,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:40,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:16:40,845 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:16:40,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 405159276, now seen corresponding path program 1 times [2021-10-28 09:16:40,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:16:40,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019844685] [2021-10-28 09:16:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:40,846 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:16:40,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:16:40,847 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:16:40,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-28 09:16:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:41,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:16:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:42,075 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:16:42,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:16:42,402 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:16:42,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:16:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:42,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:16:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:43,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:16:43,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019844685] [2021-10-28 09:16:43,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019844685] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:43,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:43,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 09:16:43,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092109386] [2021-10-28 09:16:43,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:16:43,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:16:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:16:43,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:16:43,029 INFO L87 Difference]: Start difference. First operand 1179 states and 1664 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:53,754 INFO L93 Difference]: Finished difference Result 2780 states and 3917 transitions. [2021-10-28 09:16:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:16:53,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 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 119 [2021-10-28 09:16:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:16:53,762 INFO L225 Difference]: With dead ends: 2780 [2021-10-28 09:16:53,762 INFO L226 Difference]: Without dead ends: 1616 [2021-10-28 09:16:53,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:16:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-10-28 09:16:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1179. [2021-10-28 09:16:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 1.3989813242784381) internal successors, (1648), 1178 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1648 transitions. [2021-10-28 09:16:53,823 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1648 transitions. Word has length 119 [2021-10-28 09:16:53,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:16:53,824 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1648 transitions. [2021-10-28 09:16:53,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:16:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1648 transitions. [2021-10-28 09:16:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-28 09:16:53,827 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:16:53,827 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:53,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:54,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:16:54,044 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:16:54,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1820752595, now seen corresponding path program 1 times [2021-10-28 09:16:54,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:16:54,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406814436] [2021-10-28 09:16:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:54,045 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:16:54,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:16:54,046 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:16:54,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-28 09:16:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:16:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:16:55,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:16:55,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:16:55,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 26 [2021-10-28 09:16:55,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:16:55,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:16:55,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:16:55,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:16:55,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 34 [2021-10-28 09:16:55,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:16:55,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-10-28 09:16:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-10-28 09:16:56,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:16:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-10-28 09:16:56,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:16:56,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406814436] [2021-10-28 09:16:56,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406814436] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:56,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:56,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-28 09:16:56,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23597373] [2021-10-28 09:16:56,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:16:56,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:16:56,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:16:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:16:56,978 INFO L87 Difference]: Start difference. First operand 1179 states and 1648 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:17:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:17:00,521 INFO L93 Difference]: Finished difference Result 2344 states and 3275 transitions. [2021-10-28 09:17:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:17:00,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 122 [2021-10-28 09:17:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:17:00,531 INFO L225 Difference]: With dead ends: 2344 [2021-10-28 09:17:00,531 INFO L226 Difference]: Without dead ends: 1175 [2021-10-28 09:17:00,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:17:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-10-28 09:17:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1174. [2021-10-28 09:17:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.3981244671781756) internal successors, (1640), 1173 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:17:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1640 transitions. [2021-10-28 09:17:00,611 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1640 transitions. Word has length 122 [2021-10-28 09:17:00,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:17:00,611 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1640 transitions. [2021-10-28 09:17:00,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:17:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1640 transitions. [2021-10-28 09:17:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-28 09:17:00,614 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:17:00,616 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:17:00,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:17:00,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:17:00,831 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:17:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash -272550210, now seen corresponding path program 1 times [2021-10-28 09:17:00,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:17:00,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556423473] [2021-10-28 09:17:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:00,832 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:17:00,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:17:00,833 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:17:00,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-28 09:17:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:02,788 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:17:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:04,402 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 09:17:04,402 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:17:04,403 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:17:04,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:17:04,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:17:04,631 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:17:04,634 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:17:04,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:17:04 BoogieIcfgContainer [2021-10-28 09:17:04,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:17:04,848 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:17:04,848 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:17:04,848 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:17:04,849 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:14:08" (3/4) ... [2021-10-28 09:17:04,851 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:17:04,998 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:17:04,999 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:17:05,000 INFO L168 Benchmark]: Toolchain (without parser) took 182840.43 ms. Allocated memory was 58.7 MB in the beginning and 107.0 MB in the end (delta: 48.2 MB). Free memory was 34.4 MB in the beginning and 37.9 MB in the end (delta: -3.5 MB). Peak memory consumption was 44.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:05,000 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 39.4 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:17:05,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 848.93 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 34.2 MB in the beginning and 47.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:05,005 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.95 ms. Allocated memory is still 86.0 MB. Free memory was 47.7 MB in the beginning and 63.5 MB in the end (delta: -15.8 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:05,005 INFO L168 Benchmark]: Boogie Preprocessor took 105.81 ms. Allocated memory is still 86.0 MB. Free memory was 63.5 MB in the beginning and 56.8 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:05,006 INFO L168 Benchmark]: RCFGBuilder took 5161.32 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 56.8 MB in the beginning and 81.3 MB in the end (delta: -24.5 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:05,006 INFO L168 Benchmark]: TraceAbstraction took 176452.44 ms. Allocated memory is still 107.0 MB. Free memory was 80.5 MB in the beginning and 53.7 MB in the end (delta: 26.8 MB). Peak memory consumption was 58.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:05,007 INFO L168 Benchmark]: Witness Printer took 150.77 ms. Allocated memory is still 107.0 MB. Free memory was 53.7 MB in the beginning and 37.9 MB in the end (delta: 15.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:05,010 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 39.4 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 848.93 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 34.2 MB in the beginning and 47.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 110.95 ms. Allocated memory is still 86.0 MB. Free memory was 47.7 MB in the beginning and 63.5 MB in the end (delta: -15.8 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 105.81 ms. Allocated memory is still 86.0 MB. Free memory was 63.5 MB in the beginning and 56.8 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 5161.32 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 56.8 MB in the beginning and 81.3 MB in the end (delta: -24.5 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 176452.44 ms. Allocated memory is still 107.0 MB. Free memory was 80.5 MB in the beginning and 53.7 MB in the end (delta: 26.8 MB). Peak memory consumption was 58.0 MB. Max. memory is 16.1 GB. * Witness Printer took 150.77 ms. Allocated memory is still 107.0 MB. Free memory was 53.7 MB in the beginning and 37.9 MB in the end (delta: 15.8 MB). Peak memory consumption was 16.8 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1658]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1042] static int init = 1; [L1043] static SSL_METHOD SSLv3_client_data ; VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1065] SSL *s ; [L1069] s = malloc (sizeof (SSL)) [L1070] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1071] EXPR s->s3 [L1071] s->s3->flags = __VERIFIER_nondet_long() [L1072] EXPR s->s3 [L1072] (s->s3)->tmp.cert_req = __VERIFIER_nondet_int() [L1073] EXPR s->s3 [L1073] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1074] EXPR s->s3 [L1074] EXPR (s->s3)->tmp.new_cipher [L1074] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1075] EXPR s->s3 [L1075] s->s3->tmp.next_state = __VERIFIER_nondet_int() [L1076] s->bbio = (BIO *) __VERIFIER_nondet_ulong() [L1077] s->wbio = (BIO *) __VERIFIER_nondet_ulong() [L1078] s->ctx = malloc(sizeof(SSL_CTX)) [L1079] EXPR s->ctx [L1079] (s->ctx)->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1080] s->state = 12292 [L1081] s->version = __VERIFIER_nondet_int() [L1082] s->init_buf = (BUF_MEM *)__VERIFIER_nondet_ulong() [L1083] s->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1090] BUF_MEM *buf = (BUF_MEM *)__VERIFIER_nondet_ulong(); [L1091] unsigned long tmp ; [L1092] unsigned long l ; [L1093] long num1 ; [L1094] void (*cb)() ; [L1095] int ret ; [L1096] int new_state ; [L1097] int state ; [L1098] int skip ; [L1099] int *tmp___0 ; [L1100] int tmp___1 = __VERIFIER_nondet_int(); [L1101] int tmp___2 = __VERIFIER_nondet_int(); [L1102] int tmp___3 ; [L1103] int tmp___4 ; [L1104] int tmp___5 ; [L1105] int tmp___6 ; [L1106] int tmp___7 ; [L1107] int tmp___8 ; [L1108] long tmp___9 ; [L1110] int blastFlag ; [L1113] blastFlag = 0 [L1114] s->state = 12292 [L1115] s->hit = __VERIFIER_nondet_int() [L1117] tmp = __VERIFIER_nondet_int() [L1118] cb = (void (*)())((void *)0) [L1119] ret = -1 [L1120] skip = 0 [L1121] tmp___0 = (int*)malloc(sizeof(int)) [L1122] *tmp___0 = 0 [L1123] EXPR s->info_callback VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1123] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1124] EXPR s->info_callback [L1124] cb = s->info_callback [L1132] EXPR s->in_handshake [L1132] s->in_handshake += 1 [L1133] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND TRUE s->state == 12292 [L1249] s->new_session = 1 [L1250] s->state = 4096 [L1251] EXPR s->ctx [L1251] EXPR (s->ctx)->stats.sess_connect_renegotiate [L1251] (s->ctx)->stats.sess_connect_renegotiate += 1 [L1256] s->server = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1257] COND TRUE (unsigned long )cb != (unsigned long )((void *)0) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1262] EXPR s->version VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1262] COND FALSE !((s->version & 65280) != 768) [L1268] s->type = 4096 [L1269] EXPR s->init_buf VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1269] COND FALSE !((unsigned long )s->init_buf == (unsigned long )((void *)0)) [L1281] tmp___4 = __VERIFIER_nondet_int() [L1282] COND FALSE !(! tmp___4) [L1288] tmp___5 = __VERIFIER_nondet_int() [L1289] COND FALSE !(! tmp___5) [L1295] s->state = 4368 [L1296] EXPR s->ctx [L1296] EXPR (s->ctx)->stats.sess_connect [L1296] (s->ctx)->stats.sess_connect += 1 [L1297] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND TRUE s->state == 4368 [L1301] s->shutdown = 0 [L1302] ret = __VERIFIER_nondet_int() [L1303] COND TRUE blastFlag == 0 [L1304] blastFlag = 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1308] COND FALSE !(ret <= 0) [L1313] s->state = 4384 [L1314] s->init_num = 0 [L1315] EXPR s->bbio [L1315] EXPR s->wbio VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1315] COND TRUE (unsigned long )s->bbio != (unsigned long )s->wbio [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND TRUE s->state == 4384 [L1323] ret = __VERIFIER_nondet_int() [L1324] COND TRUE blastFlag == 1 [L1325] blastFlag = 2 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1329] COND FALSE !(ret <= 0) [L1334] s->hit VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1334] COND FALSE !(s->hit) [L1337] s->state = 4400 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1339] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND TRUE s->state == 4400 [L1343] EXPR s->s3 [L1343] EXPR (s->s3)->tmp.new_cipher [L1343] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1343] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1346] ret = __VERIFIER_nondet_int() [L1347] COND TRUE blastFlag == 2 [L1348] blastFlag = 3 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1352] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1358] s->state = 4416 [L1359] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND TRUE s->state == 4416 [L1363] ret = __VERIFIER_nondet_int() [L1364] COND TRUE blastFlag == 3 [L1365] blastFlag = 4 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1369] COND FALSE !(ret <= 0) [L1374] s->state = 4432 [L1375] s->init_num = 0 [L1376] tmp___6 = __VERIFIER_nondet_int() [L1377] COND FALSE !(! tmp___6) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1185] COND TRUE s->state == 4432 [L1386] ret = __VERIFIER_nondet_int() [L1387] COND FALSE !(blastFlag == 5) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1392] COND FALSE !(ret <= 0) [L1397] s->state = 4448 [L1398] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1185] COND FALSE !(s->state == 4432) [L1188] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1188] COND FALSE !(s->state == 4433) [L1191] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1191] COND TRUE s->state == 4448 [L1402] ret = __VERIFIER_nondet_int() [L1403] COND TRUE blastFlag == 4 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1658] reach_error() VAL [init=1, SSLv3_client_data={-2147483569:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 131 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 176.1s, OverallIterations: 17, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 137.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2979 SDtfs, 2714 SDslu, 6551 SDs, 0 SdLazy, 5444 SolverSat, 575 SolverUnsat, 36 SolverUnknown, 0 SolverNotchecked, 128.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3262 GetRequests, 3179 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1179occurred in iteration=14, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 16 MinimizatonAttempts, 6547 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 19.7s InterpolantComputationTime, 1772 NumberOfCodeBlocks, 1772 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3238 ConstructedInterpolants, 5 QuantifiedInterpolants, 7532 SizeOfPredicates, 78 NumberOfNonLiveVariables, 4749 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 32 InterpolantComputations, 32 PerfectInterpolantSequences, 4372/4372 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-28 09:17:05,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d05f9f01-d7ae-4e92-9c18-fcf081678865/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...