./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:20:31,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:20:31,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:20:31,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:20:31,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:20:31,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:20:31,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:20:31,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:20:31,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:20:31,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:20:31,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:20:31,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:20:31,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:20:31,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:20:31,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:20:31,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:20:31,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:20:31,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:20:31,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:20:31,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:20:31,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:20:31,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:20:31,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:20:31,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:20:31,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:20:31,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:20:31,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:20:31,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:20:31,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:20:31,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:20:31,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:20:31,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:20:31,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:20:31,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:20:31,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:20:31,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:20:31,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:20:31,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:20:31,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:20:31,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:20:31,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:20:31,595 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:20:31,630 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:20:31,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:20:31,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:20:31,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:20:31,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:20:31,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:20:31,640 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:20:31,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:20:31,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:20:31,641 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:20:31,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:20:31,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:20:31,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:20:31,643 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:20:31,643 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:20:31,644 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:20:31,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:20:31,644 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:20:31,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:20:31,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:20:31,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:20:31,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:20:31,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:20:31,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:20:31,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:20:31,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:20:31,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:20:31,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:20:31,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:20:31,648 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_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2021-10-28 23:20:31,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:20:31,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:20:31,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:20:31,996 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:20:31,997 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:20:31,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-28 23:20:32,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data/75e6f656f/c23d7e5ad97e44a985a09c70d909759a/FLAG12dca93d5 [2021-10-28 23:20:32,619 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:20:32,619 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-28 23:20:32,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data/75e6f656f/c23d7e5ad97e44a985a09c70d909759a/FLAG12dca93d5 [2021-10-28 23:20:32,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data/75e6f656f/c23d7e5ad97e44a985a09c70d909759a [2021-10-28 23:20:32,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:20:32,902 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:20:32,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:20:32,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:20:32,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:20:32,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:20:32" (1/1) ... [2021-10-28 23:20:32,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@195b3d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:32, skipping insertion in model container [2021-10-28 23:20:32,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:20:32" (1/1) ... [2021-10-28 23:20:32,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:20:32,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:20:33,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:20:33,311 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:20:33,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:20:33,408 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:20:33,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33 WrapperNode [2021-10-28 23:20:33,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:20:33,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:20:33,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:20:33,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:20:33,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33" (1/1) ... [2021-10-28 23:20:33,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33" (1/1) ... [2021-10-28 23:20:33,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33" (1/1) ... [2021-10-28 23:20:33,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33" (1/1) ... [2021-10-28 23:20:33,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33" (1/1) ... [2021-10-28 23:20:33,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33" (1/1) ... [2021-10-28 23:20:33,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33" (1/1) ... [2021-10-28 23:20:33,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:20:33,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:20:33,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:20:33,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:20:33,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33" (1/1) ... [2021-10-28 23:20:33,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:20:33,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:20:33,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:20:33,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:20:33,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:20:33,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:20:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 23:20:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:20:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:20:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 23:20:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 23:20:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 23:20:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-28 23:20:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-28 23:20:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:20:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:20:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 23:20:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 23:20:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 23:20:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 23:20:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:20:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:20:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:20:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:20:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:20:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:20:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:20:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:20:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:20:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:20:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:20:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:20:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:20:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:20:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:20:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:20:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:20:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:20:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:20:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 23:20:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 23:20:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 23:20:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:20:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:20:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:20:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:20:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:20:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:20:33,556 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:20:33,556 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:20:33,556 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:20:33,556 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:20:33,556 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:20:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:20:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:20:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:20:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:20:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:20:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:20:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:20:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:20:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:20:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:20:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:20:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:20:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:20:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:20:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:20:33,560 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:20:33,560 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:20:33,560 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:20:33,560 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:20:33,560 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:20:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:20:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:20:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:20:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:20:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:20:33,562 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:20:33,562 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:20:33,562 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:20:33,562 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:20:33,562 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:20:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:20:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:20:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:20:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:20:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:20:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:20:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:20:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:20:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:20:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:20:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:20:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:20:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:20:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:20:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:20:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:20:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:20:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:20:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:20:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:20:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:20:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:20:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:20:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:20:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:20:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:20:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:20:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:20:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:20:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:20:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:20:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:20:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:20:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:20:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:20:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:20:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:20:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:20:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:20:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:20:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:20:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:20:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:20:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:20:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:20:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-28 23:20:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:20:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:20:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 23:20:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-28 23:20:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 23:20:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:20:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:20:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:20:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:20:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:20:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:20:34,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:20:34,221 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 23:20:34,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:20:34 BoogieIcfgContainer [2021-10-28 23:20:34,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:20:34,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:20:34,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:20:34,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:20:34,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:20:32" (1/3) ... [2021-10-28 23:20:34,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795c952d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:20:34, skipping insertion in model container [2021-10-28 23:20:34,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:20:33" (2/3) ... [2021-10-28 23:20:34,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795c952d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:20:34, skipping insertion in model container [2021-10-28 23:20:34,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:20:34" (3/3) ... [2021-10-28 23:20:34,252 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-28 23:20:34,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:20:34,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-28 23:20:34,298 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:20:34,304 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 23:20:34,304 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-28 23:20:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:20:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 23:20:34,328 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:34,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:34,329 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-10-28 23:20:34,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:34,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614389655] [2021-10-28 23:20:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:34,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:34,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:34,614 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 23:20:34,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:34,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614389655] [2021-10-28 23:20:34,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614389655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:20:34,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:20:34,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:20:34,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602327192] [2021-10-28 23:20:34,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:20:34,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:20:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:20:34,639 INFO L87 Difference]: Start difference. First operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:34,861 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-10-28 23:20:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:20:34,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 23:20:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:34,873 INFO L225 Difference]: With dead ends: 92 [2021-10-28 23:20:34,874 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 23:20:34,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 23:20:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 23:20:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-28 23:20:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 65 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:20:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-10-28 23:20:34,917 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-10-28 23:20:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:34,917 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-10-28 23:20:34,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-10-28 23:20:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:20:34,918 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:34,919 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:34,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:20:34,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:34,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:34,920 INFO L85 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-10-28 23:20:34,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:34,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331688334] [2021-10-28 23:20:34,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:34,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:35,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:35,042 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 23:20:35,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:35,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331688334] [2021-10-28 23:20:35,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331688334] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:20:35,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:20:35,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:20:35,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200570441] [2021-10-28 23:20:35,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:20:35,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:35,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:20:35,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:20:35,046 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:35,333 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-10-28 23:20:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:20:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 23:20:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:35,340 INFO L225 Difference]: With dead ends: 91 [2021-10-28 23:20:35,340 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 23:20:35,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:20:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 23:20:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-10-28 23:20:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 66 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:20:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-10-28 23:20:35,367 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-10-28 23:20:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:35,367 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-10-28 23:20:35,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-10-28 23:20:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:20:35,369 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:35,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:35,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:20:35,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-10-28 23:20:35,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:35,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140792518] [2021-10-28 23:20:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:35,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:35,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:20:35,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:35,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140792518] [2021-10-28 23:20:35,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140792518] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:20:35,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:20:35,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:20:35,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371703393] [2021-10-28 23:20:35,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:20:35,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:20:35,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:20:35,581 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:35,890 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-10-28 23:20:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:20:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 23:20:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:35,893 INFO L225 Difference]: With dead ends: 135 [2021-10-28 23:20:35,893 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 23:20:35,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:20:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 23:20:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-10-28 23:20:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 99 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:20:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-10-28 23:20:35,930 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-10-28 23:20:35,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:35,931 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-10-28 23:20:35,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-10-28 23:20:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:20:35,932 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:35,932 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:35,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:20:35,933 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-10-28 23:20:35,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:35,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827024697] [2021-10-28 23:20:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:35,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:36,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:36,075 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 23:20:36,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:36,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827024697] [2021-10-28 23:20:36,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827024697] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:20:36,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:20:36,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:20:36,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475404413] [2021-10-28 23:20:36,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:20:36,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:20:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:20:36,085 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:36,300 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-10-28 23:20:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:20:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 23:20:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:36,307 INFO L225 Difference]: With dead ends: 149 [2021-10-28 23:20:36,307 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 23:20:36,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 23:20:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 23:20:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-10-28 23:20:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.7752808988764044) internal successors, (158), 115 states have internal predecessors, (158), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-28 23:20:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-10-28 23:20:36,331 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-10-28 23:20:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:36,331 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-10-28 23:20:36,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-10-28 23:20:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:20:36,332 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:36,332 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:36,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:20:36,332 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:36,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:36,333 INFO L85 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-10-28 23:20:36,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:36,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128118788] [2021-10-28 23:20:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:36,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:36,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:36,492 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 23:20:36,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:36,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128118788] [2021-10-28 23:20:36,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128118788] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:20:36,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:20:36,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:20:36,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091309039] [2021-10-28 23:20:36,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:20:36,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:20:36,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:20:36,495 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:36,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:36,854 INFO L93 Difference]: Finished difference Result 197 states and 286 transitions. [2021-10-28 23:20:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:20:36,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 23:20:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:36,858 INFO L225 Difference]: With dead ends: 197 [2021-10-28 23:20:36,858 INFO L226 Difference]: Without dead ends: 197 [2021-10-28 23:20:36,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:20:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-28 23:20:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-10-28 23:20:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 125 states have (on average 1.752) internal successors, (219), 151 states have internal predecessors, (219), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (20), 7 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-28 23:20:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 251 transitions. [2021-10-28 23:20:36,875 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 251 transitions. Word has length 13 [2021-10-28 23:20:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:36,876 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 251 transitions. [2021-10-28 23:20:36,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:36,876 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 251 transitions. [2021-10-28 23:20:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:20:36,877 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:36,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:36,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:20:36,877 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-10-28 23:20:36,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:36,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150355386] [2021-10-28 23:20:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:36,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:36,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:36,997 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 23:20:36,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:36,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150355386] [2021-10-28 23:20:36,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150355386] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:20:36,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:20:36,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:20:36,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680573649] [2021-10-28 23:20:36,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:20:36,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:36,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:20:36,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:20:37,000 INFO L87 Difference]: Start difference. First operand 166 states and 251 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:37,348 INFO L93 Difference]: Finished difference Result 260 states and 393 transitions. [2021-10-28 23:20:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:20:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 23:20:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:37,351 INFO L225 Difference]: With dead ends: 260 [2021-10-28 23:20:37,351 INFO L226 Difference]: Without dead ends: 260 [2021-10-28 23:20:37,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:20:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-28 23:20:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 233. [2021-10-28 23:20:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 186 states have (on average 1.7258064516129032) internal successors, (321), 212 states have internal predecessors, (321), 16 states have call successors, (16), 12 states have call predecessors, (16), 13 states have return successors, (29), 9 states have call predecessors, (29), 15 states have call successors, (29) [2021-10-28 23:20:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 366 transitions. [2021-10-28 23:20:37,368 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 366 transitions. Word has length 13 [2021-10-28 23:20:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:37,369 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 366 transitions. [2021-10-28 23:20:37,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 366 transitions. [2021-10-28 23:20:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:20:37,370 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:37,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:37,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:20:37,370 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-10-28 23:20:37,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:37,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752844075] [2021-10-28 23:20:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:37,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:37,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:37,454 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 23:20:37,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:37,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752844075] [2021-10-28 23:20:37,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752844075] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:20:37,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:20:37,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:20:37,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939802598] [2021-10-28 23:20:37,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:20:37,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:20:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:20:37,456 INFO L87 Difference]: Start difference. First operand 233 states and 366 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:37,803 INFO L93 Difference]: Finished difference Result 311 states and 476 transitions. [2021-10-28 23:20:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:20:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 23:20:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:37,808 INFO L225 Difference]: With dead ends: 311 [2021-10-28 23:20:37,808 INFO L226 Difference]: Without dead ends: 311 [2021-10-28 23:20:37,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:20:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-28 23:20:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2021-10-28 23:20:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 238 states have (on average 1.7016806722689075) internal successors, (405), 262 states have internal predecessors, (405), 16 states have call successors, (16), 16 states have call predecessors, (16), 17 states have return successors, (29), 9 states have call predecessors, (29), 15 states have call successors, (29) [2021-10-28 23:20:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 450 transitions. [2021-10-28 23:20:37,824 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 450 transitions. Word has length 13 [2021-10-28 23:20:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:37,824 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 450 transitions. [2021-10-28 23:20:37,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 450 transitions. [2021-10-28 23:20:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 23:20:37,825 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:37,826 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:37,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:20:37,826 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:37,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:37,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-10-28 23:20:37,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:37,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659512544] [2021-10-28 23:20:37,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:37,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:37,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:37,934 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 23:20:37,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:37,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659512544] [2021-10-28 23:20:37,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659512544] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:20:37,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:20:37,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:20:37,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993875583] [2021-10-28 23:20:37,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:20:37,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:20:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:20:37,938 INFO L87 Difference]: Start difference. First operand 287 states and 450 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:38,171 INFO L93 Difference]: Finished difference Result 275 states and 400 transitions. [2021-10-28 23:20:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:20:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-28 23:20:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:38,175 INFO L225 Difference]: With dead ends: 275 [2021-10-28 23:20:38,175 INFO L226 Difference]: Without dead ends: 275 [2021-10-28 23:20:38,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:20:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-10-28 23:20:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 238. [2021-10-28 23:20:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 197 states have (on average 1.649746192893401) internal successors, (325), 215 states have internal predecessors, (325), 14 states have call successors, (14), 14 states have call predecessors, (14), 15 states have return successors, (23), 9 states have call predecessors, (23), 13 states have call successors, (23) [2021-10-28 23:20:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 362 transitions. [2021-10-28 23:20:38,191 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 362 transitions. Word has length 14 [2021-10-28 23:20:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:38,192 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 362 transitions. [2021-10-28 23:20:38,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 362 transitions. [2021-10-28 23:20:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:20:38,195 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:38,195 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:38,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:20:38,196 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-10-28 23:20:38,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:38,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230036370] [2021-10-28 23:20:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:38,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:38,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:38,331 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 23:20:38,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:38,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230036370] [2021-10-28 23:20:38,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230036370] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:20:38,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:20:38,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:20:38,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55059881] [2021-10-28 23:20:38,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:20:38,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:20:38,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:20:38,339 INFO L87 Difference]: Start difference. First operand 238 states and 362 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:38,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:38,580 INFO L93 Difference]: Finished difference Result 439 states and 619 transitions. [2021-10-28 23:20:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:20:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 23:20:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:38,586 INFO L225 Difference]: With dead ends: 439 [2021-10-28 23:20:38,586 INFO L226 Difference]: Without dead ends: 439 [2021-10-28 23:20:38,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:20:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-28 23:20:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 409. [2021-10-28 23:20:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 334 states have (on average 1.5089820359281436) internal successors, (504), 366 states have internal predecessors, (504), 26 states have call successors, (26), 26 states have call predecessors, (26), 37 states have return successors, (55), 17 states have call predecessors, (55), 25 states have call successors, (55) [2021-10-28 23:20:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 585 transitions. [2021-10-28 23:20:38,622 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 585 transitions. Word has length 15 [2021-10-28 23:20:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:38,622 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 585 transitions. [2021-10-28 23:20:38,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:20:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 585 transitions. [2021-10-28 23:20:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:20:38,629 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:38,629 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:38,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 23:20:38,629 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-10-28 23:20:38,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:38,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493249396] [2021-10-28 23:20:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:38,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:38,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:38,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:20:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:20:38,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:38,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493249396] [2021-10-28 23:20:38,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493249396] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:38,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597077074] [2021-10-28 23:20:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:38,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:38,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:20:38,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:20:38,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:20:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:38,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:20:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:20:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:20:39,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597077074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:39,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:20:39,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-28 23:20:39,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271081276] [2021-10-28 23:20:39,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:20:39,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:39,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:20:39,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:20:39,249 INFO L87 Difference]: Start difference. First operand 409 states and 585 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:20:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:40,149 INFO L93 Difference]: Finished difference Result 491 states and 695 transitions. [2021-10-28 23:20:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:20:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2021-10-28 23:20:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:40,153 INFO L225 Difference]: With dead ends: 491 [2021-10-28 23:20:40,154 INFO L226 Difference]: Without dead ends: 491 [2021-10-28 23:20:40,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:20:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-28 23:20:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 425. [2021-10-28 23:20:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 340 states have (on average 1.4764705882352942) internal successors, (502), 382 states have internal predecessors, (502), 26 states have call successors, (26), 26 states have call predecessors, (26), 47 states have return successors, (65), 17 states have call predecessors, (65), 25 states have call successors, (65) [2021-10-28 23:20:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 593 transitions. [2021-10-28 23:20:40,176 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 593 transitions. Word has length 22 [2021-10-28 23:20:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:40,177 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 593 transitions. [2021-10-28 23:20:40,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:20:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 593 transitions. [2021-10-28 23:20:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:20:40,178 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:40,178 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:40,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:20:40,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 23:20:40,405 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2086418946, now seen corresponding path program 1 times [2021-10-28 23:20:40,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:40,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695710690] [2021-10-28 23:20:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:40,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:40,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:40,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:20:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:20:40,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:40,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695710690] [2021-10-28 23:20:40,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695710690] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:40,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809282471] [2021-10-28 23:20:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:40,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:40,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:20:40,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:20:40,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:20:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:40,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:20:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:20:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:20:40,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809282471] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:40,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:20:40,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-28 23:20:40,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887620051] [2021-10-28 23:20:40,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:20:40,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:20:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:20:40,871 INFO L87 Difference]: Start difference. First operand 425 states and 593 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:20:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:41,722 INFO L93 Difference]: Finished difference Result 739 states and 1008 transitions. [2021-10-28 23:20:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:20:41,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-10-28 23:20:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:41,727 INFO L225 Difference]: With dead ends: 739 [2021-10-28 23:20:41,727 INFO L226 Difference]: Without dead ends: 739 [2021-10-28 23:20:41,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:20:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-10-28 23:20:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 642. [2021-10-28 23:20:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 507 states have (on average 1.4260355029585798) internal successors, (723), 579 states have internal predecessors, (723), 38 states have call successors, (38), 38 states have call predecessors, (38), 85 states have return successors, (113), 25 states have call predecessors, (113), 37 states have call successors, (113) [2021-10-28 23:20:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 874 transitions. [2021-10-28 23:20:41,759 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 874 transitions. Word has length 24 [2021-10-28 23:20:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:41,759 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 874 transitions. [2021-10-28 23:20:41,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:20:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 874 transitions. [2021-10-28 23:20:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:20:41,761 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:41,761 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:41,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:20:41,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 23:20:41,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:41,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:41,986 INFO L85 PathProgramCache]: Analyzing trace with hash -495871717, now seen corresponding path program 1 times [2021-10-28 23:20:41,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:41,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286429122] [2021-10-28 23:20:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:41,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:42,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:42,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:20:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:42,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:20:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:20:42,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:42,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286429122] [2021-10-28 23:20:42,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286429122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:42,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104352206] [2021-10-28 23:20:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:42,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:20:42,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:20:42,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:20:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:20:42,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:20:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:20:42,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104352206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:42,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:20:42,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-10-28 23:20:42,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338564805] [2021-10-28 23:20:42,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:20:42,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:42,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:20:42,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:20:42,647 INFO L87 Difference]: Start difference. First operand 642 states and 874 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:20:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:44,166 INFO L93 Difference]: Finished difference Result 2361 states and 3365 transitions. [2021-10-28 23:20:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:20:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 35 [2021-10-28 23:20:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:44,183 INFO L225 Difference]: With dead ends: 2361 [2021-10-28 23:20:44,183 INFO L226 Difference]: Without dead ends: 2361 [2021-10-28 23:20:44,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:20:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-10-28 23:20:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2015. [2021-10-28 23:20:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 1621 states have (on average 1.4090067859346083) internal successors, (2284), 1816 states have internal predecessors, (2284), 123 states have call successors, (123), 123 states have call predecessors, (123), 259 states have return successors, (388), 76 states have call predecessors, (388), 122 states have call successors, (388) [2021-10-28 23:20:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 2795 transitions. [2021-10-28 23:20:44,299 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 2795 transitions. Word has length 35 [2021-10-28 23:20:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:44,300 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 2795 transitions. [2021-10-28 23:20:44,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:20:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 2795 transitions. [2021-10-28 23:20:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 23:20:44,303 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:44,303 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:20:44,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:20:44,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:44,527 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:44,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1356372979, now seen corresponding path program 1 times [2021-10-28 23:20:44,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:44,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459900317] [2021-10-28 23:20:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:44,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:44,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:44,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:20:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:44,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:20:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:20:44,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:44,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459900317] [2021-10-28 23:20:44,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459900317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:44,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961921807] [2021-10-28 23:20:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:44,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:20:44,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:20:44,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:20:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:20:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:20:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:20:45,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961921807] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:45,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:20:45,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-28 23:20:45,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677166991] [2021-10-28 23:20:45,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:20:45,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:20:45,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:20:45,182 INFO L87 Difference]: Start difference. First operand 2015 states and 2795 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 23:20:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:46,109 INFO L93 Difference]: Finished difference Result 2783 states and 4061 transitions. [2021-10-28 23:20:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 23:20:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2021-10-28 23:20:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:46,128 INFO L225 Difference]: With dead ends: 2783 [2021-10-28 23:20:46,128 INFO L226 Difference]: Without dead ends: 2783 [2021-10-28 23:20:46,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:20:46,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-10-28 23:20:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2472. [2021-10-28 23:20:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 1977 states have (on average 1.4011127971674253) internal successors, (2770), 2227 states have internal predecessors, (2770), 169 states have call successors, (169), 146 states have call predecessors, (169), 314 states have return successors, (533), 99 states have call predecessors, (533), 168 states have call successors, (533) [2021-10-28 23:20:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3472 transitions. [2021-10-28 23:20:46,247 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3472 transitions. Word has length 36 [2021-10-28 23:20:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:46,247 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 3472 transitions. [2021-10-28 23:20:46,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 23:20:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3472 transitions. [2021-10-28 23:20:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 23:20:46,250 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:46,250 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] [2021-10-28 23:20:46,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:20:46,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:20:46,465 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:46,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:46,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1744987825, now seen corresponding path program 1 times [2021-10-28 23:20:46,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:46,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888580650] [2021-10-28 23:20:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:46,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:46,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:46,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:20:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:46,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:20:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:20:46,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:46,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888580650] [2021-10-28 23:20:46,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888580650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:46,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502917984] [2021-10-28 23:20:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:46,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:46,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:20:46,750 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:20:46,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:20:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:20:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:20:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:20:47,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502917984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:47,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:20:47,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-10-28 23:20:47,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127992538] [2021-10-28 23:20:47,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:20:47,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:20:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:20:47,184 INFO L87 Difference]: Start difference. First operand 2472 states and 3472 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:20:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:48,192 INFO L93 Difference]: Finished difference Result 2236 states and 3085 transitions. [2021-10-28 23:20:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:20:48,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-10-28 23:20:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:48,207 INFO L225 Difference]: With dead ends: 2236 [2021-10-28 23:20:48,208 INFO L226 Difference]: Without dead ends: 2120 [2021-10-28 23:20:48,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:20:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-10-28 23:20:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1825. [2021-10-28 23:20:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1447 states have (on average 1.38217000691085) internal successors, (2000), 1634 states have internal predecessors, (2000), 142 states have call successors, (142), 119 states have call predecessors, (142), 224 states have return successors, (364), 72 states have call predecessors, (364), 141 states have call successors, (364) [2021-10-28 23:20:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2506 transitions. [2021-10-28 23:20:48,314 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2506 transitions. Word has length 38 [2021-10-28 23:20:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:48,316 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 2506 transitions. [2021-10-28 23:20:48,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:20:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2506 transitions. [2021-10-28 23:20:48,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:20:48,321 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:48,321 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:20:48,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:20:48,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:48,537 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:48,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:48,538 INFO L85 PathProgramCache]: Analyzing trace with hash 421703127, now seen corresponding path program 1 times [2021-10-28 23:20:48,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:48,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210980980] [2021-10-28 23:20:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:48,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:48,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:48,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:20:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:48,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:20:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:48,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:20:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 23:20:48,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:48,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210980980] [2021-10-28 23:20:48,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210980980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:48,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808001078] [2021-10-28 23:20:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:48,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:48,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:20:48,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:20:48,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:20:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:20:48,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:20:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:20:49,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808001078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:49,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:20:49,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-10-28 23:20:49,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844863421] [2021-10-28 23:20:49,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:20:49,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:20:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:20:49,207 INFO L87 Difference]: Start difference. First operand 1825 states and 2506 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 23:20:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:50,406 INFO L93 Difference]: Finished difference Result 3248 states and 4600 transitions. [2021-10-28 23:20:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:20:50,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-10-28 23:20:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:50,430 INFO L225 Difference]: With dead ends: 3248 [2021-10-28 23:20:50,430 INFO L226 Difference]: Without dead ends: 3248 [2021-10-28 23:20:50,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:20:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-10-28 23:20:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2632. [2021-10-28 23:20:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2104 states have (on average 1.3935361216730038) internal successors, (2932), 2372 states have internal predecessors, (2932), 188 states have call successors, (188), 165 states have call predecessors, (188), 328 states have return successors, (488), 95 states have call predecessors, (488), 187 states have call successors, (488) [2021-10-28 23:20:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 3608 transitions. [2021-10-28 23:20:50,570 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 3608 transitions. Word has length 47 [2021-10-28 23:20:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:50,571 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 3608 transitions. [2021-10-28 23:20:50,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 23:20:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 3608 transitions. [2021-10-28 23:20:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 23:20:50,573 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:50,574 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:20:50,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:20:50,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:20:50,785 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:50,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:50,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1681124145, now seen corresponding path program 1 times [2021-10-28 23:20:50,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:50,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206564016] [2021-10-28 23:20:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:50,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:50,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:50,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:20:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:50,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:20:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:50,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:20:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:50,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 23:20:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 23:20:51,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:51,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206564016] [2021-10-28 23:20:51,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206564016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:51,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701553131] [2021-10-28 23:20:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:51,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:51,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:20:51,009 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:20:51,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:20:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:51,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:20:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:20:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 23:20:51,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701553131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:51,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:20:51,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-10-28 23:20:51,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609677312] [2021-10-28 23:20:51,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:20:51,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:20:51,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:20:51,490 INFO L87 Difference]: Start difference. First operand 2632 states and 3608 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:20:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:20:52,169 INFO L93 Difference]: Finished difference Result 3687 states and 5274 transitions. [2021-10-28 23:20:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:20:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-10-28 23:20:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:20:52,194 INFO L225 Difference]: With dead ends: 3687 [2021-10-28 23:20:52,194 INFO L226 Difference]: Without dead ends: 3687 [2021-10-28 23:20:52,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:20:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-10-28 23:20:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2678. [2021-10-28 23:20:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2127 states have (on average 1.3892806770098731) internal successors, (2955), 2418 states have internal predecessors, (2955), 188 states have call successors, (188), 165 states have call predecessors, (188), 351 states have return successors, (534), 95 states have call predecessors, (534), 187 states have call successors, (534) [2021-10-28 23:20:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3677 transitions. [2021-10-28 23:20:52,308 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3677 transitions. Word has length 58 [2021-10-28 23:20:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:20:52,309 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3677 transitions. [2021-10-28 23:20:52,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:20:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3677 transitions. [2021-10-28 23:20:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 23:20:52,311 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:20:52,311 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 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] [2021-10-28 23:20:52,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:20:52,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:20:52,537 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:20:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:20:52,538 INFO L85 PathProgramCache]: Analyzing trace with hash 57126017, now seen corresponding path program 1 times [2021-10-28 23:20:52,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:20:52,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171424692] [2021-10-28 23:20:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:52,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:20:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:52,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:20:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:52,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:20:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:52,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:20:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:52,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-28 23:20:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:52,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-28 23:20:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:20:52,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:20:52,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171424692] [2021-10-28 23:20:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171424692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:52,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289749570] [2021-10-28 23:20:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:20:52,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:20:52,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:20:52,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:20:52,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:20:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:20:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:20:53,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:20:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 23:20:53,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289749570] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:20:53,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:20:53,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-28 23:20:53,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135256726] [2021-10-28 23:20:53,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:20:53,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:20:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:20:53,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:20:53,438 INFO L87 Difference]: Start difference. First operand 2678 states and 3677 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-28 23:21:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:01,929 INFO L93 Difference]: Finished difference Result 10210 states and 14276 transitions. [2021-10-28 23:21:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-10-28 23:21:01,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2021-10-28 23:21:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:01,999 INFO L225 Difference]: With dead ends: 10210 [2021-10-28 23:21:02,000 INFO L226 Difference]: Without dead ends: 10035 [2021-10-28 23:21:02,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10272 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3114, Invalid=23618, Unknown=0, NotChecked=0, Total=26732 [2021-10-28 23:21:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2021-10-28 23:21:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 8947. [2021-10-28 23:21:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8947 states, 7143 states have (on average 1.360212795744085) internal successors, (9716), 8037 states have internal predecessors, (9716), 670 states have call successors, (670), 573 states have call predecessors, (670), 1123 states have return successors, (2034), 337 states have call predecessors, (2034), 669 states have call successors, (2034) [2021-10-28 23:21:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8947 states to 8947 states and 12420 transitions. [2021-10-28 23:21:02,436 INFO L78 Accepts]: Start accepts. Automaton has 8947 states and 12420 transitions. Word has length 60 [2021-10-28 23:21:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:02,436 INFO L470 AbstractCegarLoop]: Abstraction has 8947 states and 12420 transitions. [2021-10-28 23:21:02,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-28 23:21:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 8947 states and 12420 transitions. [2021-10-28 23:21:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 23:21:02,441 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:02,441 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:02,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:02,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:21:02,657 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:02,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1356938417, now seen corresponding path program 1 times [2021-10-28 23:21:02,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:02,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494573205] [2021-10-28 23:21:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:02,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:02,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:02,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:02,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:02,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:02,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 23:21:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 23:21:02,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:02,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494573205] [2021-10-28 23:21:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494573205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:02,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334938379] [2021-10-28 23:21:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:02,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:02,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:02,917 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:02,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:21:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:03,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:21:03,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 23:21:03,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334938379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:03,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:03,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-10-28 23:21:03,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176047029] [2021-10-28 23:21:03,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:21:03,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:03,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:21:03,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:21:03,533 INFO L87 Difference]: Start difference. First operand 8947 states and 12420 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 23:21:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:05,245 INFO L93 Difference]: Finished difference Result 18386 states and 26465 transitions. [2021-10-28 23:21:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 23:21:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2021-10-28 23:21:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:05,329 INFO L225 Difference]: With dead ends: 18386 [2021-10-28 23:21:05,329 INFO L226 Difference]: Without dead ends: 18386 [2021-10-28 23:21:05,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 23:21:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18386 states. [2021-10-28 23:21:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18386 to 14298. [2021-10-28 23:21:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14298 states, 11614 states have (on average 1.3810056827966248) internal successors, (16039), 12898 states have internal predecessors, (16039), 1002 states have call successors, (1002), 897 states have call predecessors, (1002), 1671 states have return successors, (3048), 503 states have call predecessors, (3048), 1001 states have call successors, (3048) [2021-10-28 23:21:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14298 states to 14298 states and 20089 transitions. [2021-10-28 23:21:05,956 INFO L78 Accepts]: Start accepts. Automaton has 14298 states and 20089 transitions. Word has length 60 [2021-10-28 23:21:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:05,957 INFO L470 AbstractCegarLoop]: Abstraction has 14298 states and 20089 transitions. [2021-10-28 23:21:05,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 23:21:05,958 INFO L276 IsEmpty]: Start isEmpty. Operand 14298 states and 20089 transitions. [2021-10-28 23:21:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 23:21:05,962 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:05,962 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 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] [2021-10-28 23:21:06,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-28 23:21:06,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:21:06,175 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:06,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:06,175 INFO L85 PathProgramCache]: Analyzing trace with hash 7649356, now seen corresponding path program 1 times [2021-10-28 23:21:06,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:06,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138481510] [2021-10-28 23:21:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:06,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:06,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:06,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:06,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:06,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:06,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 23:21:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:06,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-28 23:21:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-28 23:21:06,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:06,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138481510] [2021-10-28 23:21:06,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138481510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:06,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941759317] [2021-10-28 23:21:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:06,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:06,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:06,413 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:06,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:21:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:21:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-28 23:21:07,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941759317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:07,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:07,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-10-28 23:21:07,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931760661] [2021-10-28 23:21:07,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:21:07,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:21:07,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:21:07,030 INFO L87 Difference]: Start difference. First operand 14298 states and 20089 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 23:21:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:09,010 INFO L93 Difference]: Finished difference Result 18457 states and 26048 transitions. [2021-10-28 23:21:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 23:21:09,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 71 [2021-10-28 23:21:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:09,084 INFO L225 Difference]: With dead ends: 18457 [2021-10-28 23:21:09,084 INFO L226 Difference]: Without dead ends: 18282 [2021-10-28 23:21:09,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 23:21:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2021-10-28 23:21:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 17261. [2021-10-28 23:21:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17261 states, 13838 states have (on average 1.3599508599508598) internal successors, (18819), 15533 states have internal predecessors, (18819), 1334 states have call successors, (1334), 1059 states have call predecessors, (1334), 2078 states have return successors, (4228), 669 states have call predecessors, (4228), 1333 states have call successors, (4228) [2021-10-28 23:21:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-10-28 23:21:09,664 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 71 [2021-10-28 23:21:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:09,664 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-10-28 23:21:09,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 23:21:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-10-28 23:21:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 23:21:09,670 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:09,670 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 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] [2021-10-28 23:21:09,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:09,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:09,893 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:09,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1516849340, now seen corresponding path program 1 times [2021-10-28 23:21:09,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:09,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732477370] [2021-10-28 23:21:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:09,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:09,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:10,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:10,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 23:21:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:10,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-10-28 23:21:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:10,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-10-28 23:21:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 82 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-28 23:21:10,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:10,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732477370] [2021-10-28 23:21:10,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732477370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:10,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971274401] [2021-10-28 23:21:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:10,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:10,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:10,131 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:10,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:21:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:21:10,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 23:21:10,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971274401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:10,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:10,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-10-28 23:21:10,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108222965] [2021-10-28 23:21:10,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:21:10,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:21:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:21:10,884 INFO L87 Difference]: Start difference. First operand 17261 states and 24381 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:21:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:11,945 INFO L93 Difference]: Finished difference Result 22712 states and 32588 transitions. [2021-10-28 23:21:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:21:11,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-10-28 23:21:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:12,035 INFO L225 Difference]: With dead ends: 22712 [2021-10-28 23:21:12,035 INFO L226 Difference]: Without dead ends: 22712 [2021-10-28 23:21:12,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:21:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22712 states. [2021-10-28 23:21:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22712 to 17261. [2021-10-28 23:21:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17261 states, 13838 states have (on average 1.3599508599508598) internal successors, (18819), 15533 states have internal predecessors, (18819), 1334 states have call successors, (1334), 1059 states have call predecessors, (1334), 2078 states have return successors, (4228), 669 states have call predecessors, (4228), 1333 states have call successors, (4228) [2021-10-28 23:21:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-10-28 23:21:12,664 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 82 [2021-10-28 23:21:12,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:12,664 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-10-28 23:21:12,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:21:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-10-28 23:21:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-28 23:21:12,676 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:12,677 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 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] [2021-10-28 23:21:12,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-28 23:21:13,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:13,001 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1173694170, now seen corresponding path program 1 times [2021-10-28 23:21:13,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:13,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127491546] [2021-10-28 23:21:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:13,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:13,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:13,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:13,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:13,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 23:21:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:13,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-28 23:21:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:13,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-10-28 23:21:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 23:21:13,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:13,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127491546] [2021-10-28 23:21:13,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127491546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:13,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158092836] [2021-10-28 23:21:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:13,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:13,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:13,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:13,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:21:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:21:13,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 23:21:14,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158092836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:14,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:14,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-28 23:21:14,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339970442] [2021-10-28 23:21:14,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:21:14,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:21:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:21:14,111 INFO L87 Difference]: Start difference. First operand 17261 states and 24381 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-28 23:21:17,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:17,148 INFO L93 Difference]: Finished difference Result 27778 states and 39484 transitions. [2021-10-28 23:21:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-28 23:21:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 84 [2021-10-28 23:21:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:17,257 INFO L225 Difference]: With dead ends: 27778 [2021-10-28 23:21:17,257 INFO L226 Difference]: Without dead ends: 26524 [2021-10-28 23:21:17,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 23:21:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26524 states. [2021-10-28 23:21:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26524 to 17896. [2021-10-28 23:21:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17896 states, 14358 states have (on average 1.3469146120629614) internal successors, (19339), 16087 states have internal predecessors, (19339), 1334 states have call successors, (1334), 1140 states have call predecessors, (1334), 2193 states have return successors, (4311), 669 states have call predecessors, (4311), 1333 states have call successors, (4311) [2021-10-28 23:21:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17896 states to 17896 states and 24984 transitions. [2021-10-28 23:21:17,814 INFO L78 Accepts]: Start accepts. Automaton has 17896 states and 24984 transitions. Word has length 84 [2021-10-28 23:21:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:17,814 INFO L470 AbstractCegarLoop]: Abstraction has 17896 states and 24984 transitions. [2021-10-28 23:21:17,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-28 23:21:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17896 states and 24984 transitions. [2021-10-28 23:21:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-28 23:21:17,820 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:17,820 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:17,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:18,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:18,041 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:18,042 INFO L85 PathProgramCache]: Analyzing trace with hash 57278106, now seen corresponding path program 1 times [2021-10-28 23:21:18,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:18,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329614996] [2021-10-28 23:21:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:18,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:18,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:18,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:18,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:18,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 23:21:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-28 23:21:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 23:21:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 70 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-10-28 23:21:18,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:18,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329614996] [2021-10-28 23:21:18,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329614996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:18,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789714195] [2021-10-28 23:21:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:18,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:18,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:18,268 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:18,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:21:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:21:18,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-28 23:21:19,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789714195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:19,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:19,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-10-28 23:21:19,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524436753] [2021-10-28 23:21:19,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:21:19,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:21:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:21:19,106 INFO L87 Difference]: Start difference. First operand 17896 states and 24984 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-28 23:21:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:20,548 INFO L93 Difference]: Finished difference Result 14807 states and 19651 transitions. [2021-10-28 23:21:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 23:21:20,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 84 [2021-10-28 23:21:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:20,592 INFO L225 Difference]: With dead ends: 14807 [2021-10-28 23:21:20,592 INFO L226 Difference]: Without dead ends: 13835 [2021-10-28 23:21:20,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=2063, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 23:21:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2021-10-28 23:21:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 13300. [2021-10-28 23:21:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13300 states, 10710 states have (on average 1.3072829131652661) internal successors, (14001), 11900 states have internal predecessors, (14001), 1002 states have call successors, (1002), 897 states have call predecessors, (1002), 1577 states have return successors, (2716), 503 states have call predecessors, (2716), 1001 states have call successors, (2716) [2021-10-28 23:21:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13300 states to 13300 states and 17719 transitions. [2021-10-28 23:21:21,189 INFO L78 Accepts]: Start accepts. Automaton has 13300 states and 17719 transitions. Word has length 84 [2021-10-28 23:21:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:21,190 INFO L470 AbstractCegarLoop]: Abstraction has 13300 states and 17719 transitions. [2021-10-28 23:21:21,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-28 23:21:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 13300 states and 17719 transitions. [2021-10-28 23:21:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 23:21:21,193 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:21,194 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:21,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:21,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 23:21:21,413 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:21,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:21,414 INFO L85 PathProgramCache]: Analyzing trace with hash -478636956, now seen corresponding path program 1 times [2021-10-28 23:21:21,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:21,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921726090] [2021-10-28 23:21:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:21,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:21,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:21,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:21,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:21,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:21,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 23:21:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:21,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-28 23:21:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:21,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-28 23:21:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 38 proven. 67 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-28 23:21:21,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:21,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921726090] [2021-10-28 23:21:21,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921726090] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:21,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146928196] [2021-10-28 23:21:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:21,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:21,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:21,669 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:21,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:21:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:21:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 65 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-28 23:21:22,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146928196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:22,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:22,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2021-10-28 23:21:22,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436866302] [2021-10-28 23:21:22,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:21:22,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:21:22,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:21:22,412 INFO L87 Difference]: Start difference. First operand 13300 states and 17719 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:21:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:23,428 INFO L93 Difference]: Finished difference Result 13075 states and 17272 transitions. [2021-10-28 23:21:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:21:23,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 85 [2021-10-28 23:21:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:23,474 INFO L225 Difference]: With dead ends: 13075 [2021-10-28 23:21:23,474 INFO L226 Difference]: Without dead ends: 13075 [2021-10-28 23:21:23,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:21:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13075 states. [2021-10-28 23:21:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13075 to 12880. [2021-10-28 23:21:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12880 states, 10360 states have (on average 1.2998069498069498) internal successors, (13466), 11514 states have internal predecessors, (13466), 978 states have call successors, (978), 875 states have call predecessors, (978), 1531 states have return successors, (2628), 491 states have call predecessors, (2628), 977 states have call successors, (2628) [2021-10-28 23:21:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12880 states to 12880 states and 17072 transitions. [2021-10-28 23:21:23,834 INFO L78 Accepts]: Start accepts. Automaton has 12880 states and 17072 transitions. Word has length 85 [2021-10-28 23:21:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:23,834 INFO L470 AbstractCegarLoop]: Abstraction has 12880 states and 17072 transitions. [2021-10-28 23:21:23,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:21:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 12880 states and 17072 transitions. [2021-10-28 23:21:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 23:21:23,838 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:23,838 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-10-28 23:21:23,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:24,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:21:24,057 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1378069754, now seen corresponding path program 1 times [2021-10-28 23:21:24,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:24,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217649060] [2021-10-28 23:21:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:24,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:24,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:24,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:24,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:24,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:24,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 23:21:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-28 23:21:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:24,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-10-28 23:21:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-28 23:21:24,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:24,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217649060] [2021-10-28 23:21:24,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217649060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:24,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976393780] [2021-10-28 23:21:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:24,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:24,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:24,329 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:24,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:21:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:21:24,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 23:21:25,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976393780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:25,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:25,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-10-28 23:21:25,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074238606] [2021-10-28 23:21:25,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:21:25,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:21:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:21:25,173 INFO L87 Difference]: Start difference. First operand 12880 states and 17072 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 23:21:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:26,698 INFO L93 Difference]: Finished difference Result 20786 states and 27151 transitions. [2021-10-28 23:21:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 23:21:26,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-10-28 23:21:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:26,754 INFO L225 Difference]: With dead ends: 20786 [2021-10-28 23:21:26,754 INFO L226 Difference]: Without dead ends: 19891 [2021-10-28 23:21:26,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:21:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19891 states. [2021-10-28 23:21:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19891 to 18204. [2021-10-28 23:21:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18204 states, 14593 states have (on average 1.2843829233193997) internal successors, (18743), 16269 states have internal predecessors, (18743), 1404 states have call successors, (1404), 1214 states have call predecessors, (1404), 2196 states have return successors, (3836), 721 states have call predecessors, (3836), 1403 states have call successors, (3836) [2021-10-28 23:21:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18204 states to 18204 states and 23983 transitions. [2021-10-28 23:21:27,244 INFO L78 Accepts]: Start accepts. Automaton has 18204 states and 23983 transitions. Word has length 86 [2021-10-28 23:21:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:27,245 INFO L470 AbstractCegarLoop]: Abstraction has 18204 states and 23983 transitions. [2021-10-28 23:21:27,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 23:21:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 18204 states and 23983 transitions. [2021-10-28 23:21:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-28 23:21:27,249 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:27,249 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:27,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:27,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:21:27,465 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:27,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash -616739140, now seen corresponding path program 1 times [2021-10-28 23:21:27,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:27,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187714262] [2021-10-28 23:21:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:27,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:27,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:27,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:27,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:27,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-10-28 23:21:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:27,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-10-28 23:21:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:27,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 23:21:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 70 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-10-28 23:21:27,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:27,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187714262] [2021-10-28 23:21:27,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187714262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:27,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173293899] [2021-10-28 23:21:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:27,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:27,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:27,741 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:27,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:21:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:28,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 23:21:28,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 108 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 23:21:28,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173293899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:28,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:28,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-28 23:21:28,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923390702] [2021-10-28 23:21:28,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:21:28,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:21:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:21:28,653 INFO L87 Difference]: Start difference. First operand 18204 states and 23983 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-28 23:21:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:31,446 INFO L93 Difference]: Finished difference Result 13417 states and 17122 transitions. [2021-10-28 23:21:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 23:21:31,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 92 [2021-10-28 23:21:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:31,486 INFO L225 Difference]: With dead ends: 13417 [2021-10-28 23:21:31,486 INFO L226 Difference]: Without dead ends: 12804 [2021-10-28 23:21:31,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 23:21:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12804 states. [2021-10-28 23:21:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12804 to 12620. [2021-10-28 23:21:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12620 states, 10074 states have (on average 1.2790351399642645) internal successors, (12885), 11210 states have internal predecessors, (12885), 988 states have call successors, (988), 899 states have call predecessors, (988), 1547 states have return successors, (2458), 511 states have call predecessors, (2458), 987 states have call successors, (2458) [2021-10-28 23:21:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12620 states to 12620 states and 16331 transitions. [2021-10-28 23:21:31,822 INFO L78 Accepts]: Start accepts. Automaton has 12620 states and 16331 transitions. Word has length 92 [2021-10-28 23:21:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:31,823 INFO L470 AbstractCegarLoop]: Abstraction has 12620 states and 16331 transitions. [2021-10-28 23:21:31,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-28 23:21:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 12620 states and 16331 transitions. [2021-10-28 23:21:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 23:21:31,938 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:31,938 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 5, 4, 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] [2021-10-28 23:21:31,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:32,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 23:21:32,139 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash 259058990, now seen corresponding path program 1 times [2021-10-28 23:21:32,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:32,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505098673] [2021-10-28 23:21:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:32,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:32,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:32,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:32,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:32,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:32,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 23:21:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:32,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-28 23:21:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:32,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-28 23:21:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:32,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-28 23:21:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 80 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-28 23:21:32,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:32,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505098673] [2021-10-28 23:21:32,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505098673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:32,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621655673] [2021-10-28 23:21:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:32,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:32,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:32,489 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:32,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:21:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-28 23:21:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 108 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-28 23:21:33,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621655673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:33,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:33,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-10-28 23:21:33,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326766765] [2021-10-28 23:21:33,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:21:33,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:33,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:21:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:21:33,980 INFO L87 Difference]: Start difference. First operand 12620 states and 16331 transitions. Second operand has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-28 23:21:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:40,441 INFO L93 Difference]: Finished difference Result 21726 states and 27863 transitions. [2021-10-28 23:21:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-28 23:21:40,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 95 [2021-10-28 23:21:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:40,506 INFO L225 Difference]: With dead ends: 21726 [2021-10-28 23:21:40,507 INFO L226 Difference]: Without dead ends: 21592 [2021-10-28 23:21:40,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1246, Invalid=5726, Unknown=0, NotChecked=0, Total=6972 [2021-10-28 23:21:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21592 states. [2021-10-28 23:21:40,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21592 to 20891. [2021-10-28 23:21:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20891 states, 16726 states have (on average 1.2621068994380007) internal successors, (21110), 18565 states have internal predecessors, (21110), 1608 states have call successors, (1608), 1485 states have call predecessors, (1608), 2546 states have return successors, (4151), 841 states have call predecessors, (4151), 1607 states have call successors, (4151) [2021-10-28 23:21:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20891 states to 20891 states and 26869 transitions. [2021-10-28 23:21:40,953 INFO L78 Accepts]: Start accepts. Automaton has 20891 states and 26869 transitions. Word has length 95 [2021-10-28 23:21:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:40,954 INFO L470 AbstractCegarLoop]: Abstraction has 20891 states and 26869 transitions. [2021-10-28 23:21:40,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-28 23:21:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 20891 states and 26869 transitions. [2021-10-28 23:21:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 23:21:40,962 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:40,963 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 8, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 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] [2021-10-28 23:21:41,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:41,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 23:21:41,189 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:41,190 INFO L85 PathProgramCache]: Analyzing trace with hash 756702157, now seen corresponding path program 1 times [2021-10-28 23:21:41,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:41,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769644762] [2021-10-28 23:21:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:41,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:21:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:21:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:21:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:21:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 23:21:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-28 23:21:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-28 23:21:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-28 23:21:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-10-28 23:21:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-10-28 23:21:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-10-28 23:21:41,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:41,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769644762] [2021-10-28 23:21:41,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769644762] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:41,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67601115] [2021-10-28 23:21:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:41,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:41,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:41,629 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:21:41,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:21:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:21:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 91 proven. 62 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-10-28 23:21:42,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67601115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:21:42,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:42,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-10-28 23:21:42,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816360834] [2021-10-28 23:21:42,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:21:42,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:21:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:21:42,758 INFO L87 Difference]: Start difference. First operand 20891 states and 26869 transitions. Second operand has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-28 23:21:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:45,374 INFO L93 Difference]: Finished difference Result 26244 states and 33478 transitions. [2021-10-28 23:21:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 23:21:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 118 [2021-10-28 23:21:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:45,450 INFO L225 Difference]: With dead ends: 26244 [2021-10-28 23:21:45,451 INFO L226 Difference]: Without dead ends: 26082 [2021-10-28 23:21:45,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 23:21:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26082 states. [2021-10-28 23:21:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26082 to 25019. [2021-10-28 23:21:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25019 states, 19786 states have (on average 1.2359749317699384) internal successors, (24455), 22050 states have internal predecessors, (24455), 2142 states have call successors, (2142), 1850 states have call predecessors, (2142), 3080 states have return successors, (5385), 1119 states have call predecessors, (5385), 2141 states have call successors, (5385) [2021-10-28 23:21:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25019 states to 25019 states and 31982 transitions. [2021-10-28 23:21:46,130 INFO L78 Accepts]: Start accepts. Automaton has 25019 states and 31982 transitions. Word has length 118 [2021-10-28 23:21:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:46,131 INFO L470 AbstractCegarLoop]: Abstraction has 25019 states and 31982 transitions. [2021-10-28 23:21:46,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-28 23:21:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 25019 states and 31982 transitions. [2021-10-28 23:21:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-28 23:21:46,143 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:46,143 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 9, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 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] [2021-10-28 23:21:46,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:46,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:21:46,369 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash -607088145, now seen corresponding path program 1 times [2021-10-28 23:21:46,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:46,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844366861] [2021-10-28 23:21:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:46,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:21:46,437 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:21:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:21:46,573 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:21:46,574 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:21:46,575 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:21:46,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-28 23:21:46,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-28 23:21:46,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-28 23:21:46,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-28 23:21:46,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-28 23:21:46,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-28 23:21:46,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-28 23:21:46,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-28 23:21:46,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-28 23:21:46,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-28 23:21:46,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-28 23:21:46,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-28 23:21:46,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-28 23:21:46,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-28 23:21:46,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:21:46,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:21:46,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:21:46,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:21:46,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:21:46,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-28 23:21:46,585 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] [2021-10-28 23:21:46,589 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:21:46,657 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 23:21:46,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:21:46 BoogieIcfgContainer [2021-10-28 23:21:46,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:21:46,738 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:21:46,738 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:21:46,738 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:21:46,739 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:20:34" (3/4) ... [2021-10-28 23:21:46,742 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 23:21:46,743 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:21:46,745 INFO L168 Benchmark]: Toolchain (without parser) took 73841.56 ms. Allocated memory was 92.3 MB in the beginning and 3.4 GB in the end (delta: 3.3 GB). Free memory was 56.4 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 688.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:46,746 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 64.7 MB in the beginning and 64.7 MB in the end (delta: 31.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:21:46,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 500.98 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 56.2 MB in the beginning and 95.4 MB in the end (delta: -39.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:46,747 INFO L168 Benchmark]: Boogie Preprocessor took 60.01 ms. Allocated memory is still 125.8 MB. Free memory was 95.4 MB in the beginning and 92.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:46,747 INFO L168 Benchmark]: RCFGBuilder took 753.35 ms. Allocated memory is still 125.8 MB. Free memory was 92.4 MB in the beginning and 99.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:46,748 INFO L168 Benchmark]: TraceAbstraction took 72511.64 ms. Allocated memory was 125.8 MB in the beginning and 3.4 GB in the end (delta: 3.3 GB). Free memory was 99.9 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 699.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:46,748 INFO L168 Benchmark]: Witness Printer took 5.95 ms. Allocated memory is still 3.4 GB. Free memory is still 2.7 GB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:21:46,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 64.7 MB in the beginning and 64.7 MB in the end (delta: 31.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 500.98 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 56.2 MB in the beginning and 95.4 MB in the end (delta: -39.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.01 ms. Allocated memory is still 125.8 MB. Free memory was 95.4 MB in the beginning and 92.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 753.35 ms. Allocated memory is still 125.8 MB. Free memory was 92.4 MB in the beginning and 99.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 72511.64 ms. Allocated memory was 125.8 MB in the beginning and 3.4 GB in the end (delta: 3.3 GB). Free memory was 99.9 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 699.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.95 ms. Allocated memory is still 3.4 GB. Free memory is still 2.7 GB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=54, \old(garbage)=49, \old(pc1)=67, \old(pc4)=50, \old(res4)=60, \old(S)=57, \old(S)=55, \old(t1)=70, \old(t1)=62, \old(t4)=58, \old(t4)=53, \old(x1)=74, \old(x1)=61, \old(x4)=68, \old(x4)=51, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, pc4++=1, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L576] EXPR t4->next VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, t4->next={0:0}, x1={-1:0}, x4={0:0}] [L576] x4 = t4->next [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc1++=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=0, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, \result=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 92 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 72.2s, OverallIterations: 28, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 42.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2610 SDtfs, 9650 SDslu, 6262 SDs, 0 SdLazy, 21611 SolverSat, 3963 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2366 GetRequests, 1507 SyntacticMatches, 6 SemanticMatches, 853 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 24.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25019occurred in iteration=27, InterpolantAutomatonStates: 737, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.5s AutomataMinimizationTime, 27 MinimizatonAttempts, 27612 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 2592 NumberOfCodeBlocks, 2592 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2416 ConstructedInterpolants, 10 QuantifiedInterpolants, 11863 SizeOfPredicates, 78 NumberOfNonLiveVariables, 10163 ConjunctsInSsa, 373 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 2905/3662 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 23:21:46,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/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 23:21:49,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:21:49,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:21:49,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:21:49,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:21:49,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:21:49,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:21:49,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:21:49,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:21:49,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:21:49,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:21:49,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:21:49,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:21:49,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:21:49,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:21:49,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:21:49,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:21:49,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:21:49,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:21:49,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:21:49,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:21:49,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:21:49,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:21:49,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:21:49,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:21:49,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:21:49,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:21:49,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:21:49,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:21:49,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:21:49,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:21:49,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:21:49,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:21:49,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:21:49,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:21:49,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:21:49,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:21:49,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:21:49,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:21:49,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:21:49,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:21:49,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 23:21:49,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:21:49,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:21:49,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:21:49,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:21:49,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:21:49,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:21:49,564 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:21:49,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:21:49,565 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:21:49,565 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:21:49,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:21:49,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:21:49,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:21:49,566 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:21:49,566 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:21:49,566 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:21:49,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:21:49,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:21:49,567 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 23:21:49,567 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 23:21:49,567 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:21:49,568 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:21:49,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:21:49,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:21:49,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:21:49,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:21:49,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:21:49,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:21:49,569 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 23:21:49,570 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 23:21:49,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:21:49,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 23:21:49,570 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_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2021-10-28 23:21:50,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:21:50,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:21:50,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:21:50,054 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:21:50,054 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:21:50,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-28 23:21:50,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data/b34435c2f/1ac1ee812f814c76915c185eaa4af7c6/FLAGbfab8760a [2021-10-28 23:21:50,886 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:21:50,887 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-28 23:21:50,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data/b34435c2f/1ac1ee812f814c76915c185eaa4af7c6/FLAGbfab8760a [2021-10-28 23:21:51,110 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/data/b34435c2f/1ac1ee812f814c76915c185eaa4af7c6 [2021-10-28 23:21:51,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:21:51,115 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:21:51,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:21:51,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:21:51,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:21:51,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c47faec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51, skipping insertion in model container [2021-10-28 23:21:51,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:21:51,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:21:51,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:21:51,529 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:21:51,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:21:51,646 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:21:51,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51 WrapperNode [2021-10-28 23:21:51,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:21:51,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:21:51,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:21:51,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:21:51,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:21:51,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:21:51,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:21:51,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:21:51,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51" (1/1) ... [2021-10-28 23:21:51,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:21:51,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:51,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:21:51,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:21:51,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:21:51,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:21:51,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 23:21:51,852 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 23:21:51,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:21:51,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:21:51,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 23:21:51,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 23:21:51,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 23:21:51,855 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-28 23:21:51,856 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-28 23:21:51,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:21:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:21:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 23:21:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 23:21:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 23:21:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 23:21:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:21:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:21:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:21:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:21:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:21:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:21:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:21:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:21:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:21:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:21:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:21:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:21:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:21:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 23:21:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 23:21:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 23:21:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:21:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:21:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:21:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:21:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:21:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:21:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:21:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:21:51,863 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:21:51,864 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:21:51,864 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:21:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:21:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:21:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:21:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:21:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:21:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:21:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:21:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:21:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:21:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:21:51,867 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:21:51,867 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:21:51,867 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:21:51,867 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:21:51,868 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:21:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:21:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:21:51,870 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:21:51,870 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:21:51,870 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:21:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:21:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:21:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:21:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:21:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:21:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:21:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:21:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:21:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:21:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:21:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:21:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:21:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:21:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:21:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:21:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:21:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:21:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:21:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:21:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:21:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:21:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:21:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:21:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:21:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:21:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:21:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:21:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:21:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:21:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:21:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:21:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:21:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:21:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:21:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:21:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:21:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:21:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:21:51,879 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:21:51,879 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:21:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:21:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:21:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:21:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:21:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:21:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:21:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:21:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:21:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:21:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:21:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:21:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:21:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:21:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:21:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:21:51,883 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-28 23:21:51,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:21:51,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 23:21:51,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 23:21:51,887 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-28 23:21:51,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 23:21:51,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 23:21:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:21:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:21:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:21:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 23:21:51,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:21:51,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 23:21:51,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 23:21:51,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 23:21:52,766 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:21:52,766 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 23:21:52,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:21:52 BoogieIcfgContainer [2021-10-28 23:21:52,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:21:52,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:21:52,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:21:52,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:21:52,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:21:51" (1/3) ... [2021-10-28 23:21:52,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b23afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:21:52, skipping insertion in model container [2021-10-28 23:21:52,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:51" (2/3) ... [2021-10-28 23:21:52,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b23afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:21:52, skipping insertion in model container [2021-10-28 23:21:52,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:21:52" (3/3) ... [2021-10-28 23:21:52,781 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-28 23:21:52,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:21:52,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-28 23:21:52,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:21:52,882 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 23:21:52,882 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-28 23:21:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:21:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 23:21:52,924 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:52,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:52,925 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-10-28 23:21:52,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:21:52,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356625712] [2021-10-28 23:21:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:52,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:21:52,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:21:52,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:21:52,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 23:21:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 23:21:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:53,234 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 23:21:53,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:21:53,291 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 23:21:53,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:21:53,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356625712] [2021-10-28 23:21:53,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356625712] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:53,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:53,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 23:21:53,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105658018] [2021-10-28 23:21:53,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:21:53,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:21:53,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:21:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:21:53,324 INFO L87 Difference]: Start difference. First operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:53,350 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-10-28 23:21:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:21:53,352 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 23:21:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:53,370 INFO L225 Difference]: With dead ends: 72 [2021-10-28 23:21:53,370 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 23:21:53,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:21:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 23:21:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 23:21:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 63 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:21:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-10-28 23:21:53,425 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-10-28 23:21:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:53,426 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-10-28 23:21:53,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-10-28 23:21:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 23:21:53,428 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:53,428 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:53,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:53,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:21:53,645 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:53,646 INFO L85 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-10-28 23:21:53,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:21:53,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905001737] [2021-10-28 23:21:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:53,647 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:21:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:21:53,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:21:53,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 23:21:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:21:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:54,007 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 23:21:54,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:21:54,145 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 23:21:54,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:21:54,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905001737] [2021-10-28 23:21:54,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905001737] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:54,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:54,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 23:21:54,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764626843] [2021-10-28 23:21:54,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:21:54,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:21:54,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:21:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:21:54,151 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:54,235 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-10-28 23:21:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:21:54,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 23:21:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:54,242 INFO L225 Difference]: With dead ends: 120 [2021-10-28 23:21:54,243 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 23:21:54,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 23:21:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 23:21:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-10-28 23:21:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 93 states have internal predecessors, (133), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:21:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-10-28 23:21:54,277 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-10-28 23:21:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:54,278 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-10-28 23:21:54,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-10-28 23:21:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 23:21:54,279 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:54,279 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:54,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:54,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:21:54,491 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-10-28 23:21:54,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:21:54,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509246128] [2021-10-28 23:21:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:54,493 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:21:54,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:21:54,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:21:54,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 23:21:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:54,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:21:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:54,710 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 23:21:54,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:21:54,749 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 23:21:54,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:21:54,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509246128] [2021-10-28 23:21:54,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509246128] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:54,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:54,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 23:21:54,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659087024] [2021-10-28 23:21:54,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:21:54,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:21:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:21:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:21:54,752 INFO L87 Difference]: Start difference. First operand 102 states and 145 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:54,948 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-10-28 23:21:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:21:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-28 23:21:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:54,951 INFO L225 Difference]: With dead ends: 128 [2021-10-28 23:21:54,952 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 23:21:54,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 23:21:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 23:21:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-10-28 23:21:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 104 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-28 23:21:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-10-28 23:21:54,966 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-10-28 23:21:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:54,966 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-10-28 23:21:54,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-10-28 23:21:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:21:54,968 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:54,977 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:55,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:55,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:21:55,178 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-10-28 23:21:55,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:21:55,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615843743] [2021-10-28 23:21:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:55,179 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:21:55,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:21:55,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:21:55,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 23:21:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:21:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:55,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-28 23:21:55,446 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 23:21:55,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:21:55,502 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 23:21:55,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:21:55,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615843743] [2021-10-28 23:21:55,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615843743] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:55,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:55,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 23:21:55,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621073905] [2021-10-28 23:21:55,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:21:55,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:21:55,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:21:55,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:21:55,508 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:55,711 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-10-28 23:21:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:21:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 23:21:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:55,721 INFO L225 Difference]: With dead ends: 198 [2021-10-28 23:21:55,721 INFO L226 Difference]: Without dead ends: 198 [2021-10-28 23:21:55,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 23:21:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-28 23:21:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-10-28 23:21:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 134 states have (on average 1.7761194029850746) internal successors, (238), 160 states have internal predecessors, (238), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-10-28 23:21:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-10-28 23:21:55,750 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-10-28 23:21:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:55,751 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-10-28 23:21:55,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-10-28 23:21:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:21:55,753 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:55,754 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:55,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-28 23:21:55,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:21:55,966 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-10-28 23:21:55,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:21:55,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909492055] [2021-10-28 23:21:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:55,968 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:21:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:21:55,969 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:21:55,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 23:21:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:21:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:56,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-28 23:21:56,225 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 23:21:56,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:21:56,307 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 23:21:56,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:21:56,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909492055] [2021-10-28 23:21:56,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909492055] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:56,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:56,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-28 23:21:56,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318131652] [2021-10-28 23:21:56,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:21:56,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:21:56,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:21:56,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:21:56,316 INFO L87 Difference]: Start difference. First operand 177 states and 276 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:56,672 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-10-28 23:21:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:21:56,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 23:21:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:56,678 INFO L225 Difference]: With dead ends: 333 [2021-10-28 23:21:56,678 INFO L226 Difference]: Without dead ends: 333 [2021-10-28 23:21:56,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 23:21:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-10-28 23:21:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-10-28 23:21:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 242 states have (on average 1.7314049586776858) internal successors, (419), 268 states have internal predecessors, (419), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (35), 9 states have call predecessors, (35), 17 states have call successors, (35) [2021-10-28 23:21:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-10-28 23:21:56,707 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-10-28 23:21:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:56,708 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-10-28 23:21:56,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-10-28 23:21:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:21:56,709 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:56,709 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:56,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:56,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:21:56,929 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-10-28 23:21:56,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:21:56,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589847608] [2021-10-28 23:21:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:56,930 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:21:56,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:21:56,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:21:56,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 23:21:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:57,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:21:57,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:57,195 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 23:21:57,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:21:57,271 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 23:21:57,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:21:57,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589847608] [2021-10-28 23:21:57,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589847608] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:57,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:57,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-28 23:21:57,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94073280] [2021-10-28 23:21:57,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:21:57,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:21:57,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:21:57,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:21:57,278 INFO L87 Difference]: Start difference. First operand 295 states and 472 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:57,326 INFO L93 Difference]: Finished difference Result 197 states and 283 transitions. [2021-10-28 23:21:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:21:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 23:21:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:57,329 INFO L225 Difference]: With dead ends: 197 [2021-10-28 23:21:57,330 INFO L226 Difference]: Without dead ends: 197 [2021-10-28 23:21:57,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 23:21:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-28 23:21:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-10-28 23:21:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 162 states have internal predecessors, (241), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-28 23:21:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-10-28 23:21:57,364 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-10-28 23:21:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:57,364 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-10-28 23:21:57,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-10-28 23:21:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:21:57,367 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:57,367 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:57,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:57,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:21:57,587 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:57,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-10-28 23:21:57,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:21:57,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213481341] [2021-10-28 23:21:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:57,588 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:21:57,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:21:57,589 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:21:57,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 23:21:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:21:57,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:57,874 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 23:21:57,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:21:57,932 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 23:21:57,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:21:57,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213481341] [2021-10-28 23:21:57,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213481341] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:57,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:57,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-28 23:21:57,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062404163] [2021-10-28 23:21:57,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:21:57,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:21:57,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:21:57,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:21:57,935 INFO L87 Difference]: Start difference. First operand 181 states and 271 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:57,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:57,989 INFO L93 Difference]: Finished difference Result 297 states and 420 transitions. [2021-10-28 23:21:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:21:57,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 23:21:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:57,996 INFO L225 Difference]: With dead ends: 297 [2021-10-28 23:21:57,996 INFO L226 Difference]: Without dead ends: 297 [2021-10-28 23:21:57,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 23:21:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-10-28 23:21:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 281. [2021-10-28 23:21:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 246 states have internal predecessors, (338), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-10-28 23:21:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-10-28 23:21:58,016 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-10-28 23:21:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:58,017 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-10-28 23:21:58,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:21:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-10-28 23:21:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:21:58,019 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:58,019 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:58,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:58,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:21:58,221 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-10-28 23:21:58,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:21:58,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027067910] [2021-10-28 23:21:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:58,222 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:21:58,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:21:58,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:21:58,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 23:21:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:58,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:21:58,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:21:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:58,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:21:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:58,821 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:21:58,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027067910] [2021-10-28 23:21:58,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027067910] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:21:58,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:21:58,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-28 23:21:58,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330132715] [2021-10-28 23:21:58,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:21:58,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:21:58,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:21:58,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:21:58,825 INFO L87 Difference]: Start difference. First operand 281 states and 404 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:21:59,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:21:59,567 INFO L93 Difference]: Finished difference Result 690 states and 1010 transitions. [2021-10-28 23:21:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:21:59,568 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2021-10-28 23:21:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:21:59,574 INFO L225 Difference]: With dead ends: 690 [2021-10-28 23:21:59,574 INFO L226 Difference]: Without dead ends: 690 [2021-10-28 23:21:59,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:21:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-10-28 23:21:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 587. [2021-10-28 23:21:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 472 states have (on average 1.5423728813559323) internal successors, (728), 520 states have internal predecessors, (728), 42 states have call successors, (42), 42 states have call predecessors, (42), 61 states have return successors, (95), 25 states have call predecessors, (95), 41 states have call successors, (95) [2021-10-28 23:21:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 865 transitions. [2021-10-28 23:21:59,624 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 865 transitions. Word has length 18 [2021-10-28 23:21:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:21:59,624 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 865 transitions. [2021-10-28 23:21:59,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:21:59,625 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 865 transitions. [2021-10-28 23:21:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:21:59,626 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:21:59,626 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:59,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:21:59,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:21:59,839 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:21:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1092083902, now seen corresponding path program 1 times [2021-10-28 23:21:59,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:21:59,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565871311] [2021-10-28 23:21:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:59,841 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:21:59,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:21:59,842 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:21:59,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-28 23:22:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:22:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:00,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:00,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:00,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565871311] [2021-10-28 23:22:00,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565871311] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:00,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:00,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-28 23:22:00,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389838554] [2021-10-28 23:22:00,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:22:00,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:22:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:22:00,400 INFO L87 Difference]: Start difference. First operand 587 states and 865 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:22:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:01,060 INFO L93 Difference]: Finished difference Result 945 states and 1354 transitions. [2021-10-28 23:22:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:22:01,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-10-28 23:22:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:01,068 INFO L225 Difference]: With dead ends: 945 [2021-10-28 23:22:01,068 INFO L226 Difference]: Without dead ends: 945 [2021-10-28 23:22:01,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:22:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-10-28 23:22:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 837. [2021-10-28 23:22:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 666 states have (on average 1.509009009009009) internal successors, (1005), 738 states have internal predecessors, (1005), 62 states have call successors, (62), 62 states have call predecessors, (62), 97 states have return successors, (127), 37 states have call predecessors, (127), 61 states have call successors, (127) [2021-10-28 23:22:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1194 transitions. [2021-10-28 23:22:01,122 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1194 transitions. Word has length 20 [2021-10-28 23:22:01,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:01,122 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1194 transitions. [2021-10-28 23:22:01,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:22:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1194 transitions. [2021-10-28 23:22:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:22:01,124 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:01,125 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:01,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:01,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:01,337 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:01,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:01,338 INFO L85 PathProgramCache]: Analyzing trace with hash -389155418, now seen corresponding path program 2 times [2021-10-28 23:22:01,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:01,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176796916] [2021-10-28 23:22:01,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:01,338 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:01,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:01,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-28 23:22:01,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:01,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:01,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:22:01,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:22:01,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:22:01,938 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:01,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176796916] [2021-10-28 23:22:01,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176796916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:01,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:01,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-28 23:22:01,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577200195] [2021-10-28 23:22:01,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:22:01,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:01,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:22:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:01,941 INFO L87 Difference]: Start difference. First operand 837 states and 1194 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:22:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:02,177 INFO L93 Difference]: Finished difference Result 1191 states and 1639 transitions. [2021-10-28 23:22:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:22:02,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2021-10-28 23:22:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:02,186 INFO L225 Difference]: With dead ends: 1191 [2021-10-28 23:22:02,186 INFO L226 Difference]: Without dead ends: 1191 [2021-10-28 23:22:02,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:22:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-10-28 23:22:02,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1147. [2021-10-28 23:22:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 908 states have (on average 1.4515418502202644) internal successors, (1318), 1016 states have internal predecessors, (1318), 82 states have call successors, (82), 82 states have call predecessors, (82), 145 states have return successors, (195), 49 states have call predecessors, (195), 81 states have call successors, (195) [2021-10-28 23:22:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1595 transitions. [2021-10-28 23:22:02,257 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1595 transitions. Word has length 27 [2021-10-28 23:22:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:02,258 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1595 transitions. [2021-10-28 23:22:02,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:22:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1595 transitions. [2021-10-28 23:22:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:22:02,259 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:02,260 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:02,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:02,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:02,472 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:02,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:02,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1024254868, now seen corresponding path program 1 times [2021-10-28 23:22:02,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:02,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375140818] [2021-10-28 23:22:02,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:02,474 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:02,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:02,475 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:02,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-28 23:22:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:02,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:22:02,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:03,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:03,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:03,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375140818] [2021-10-28 23:22:03,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375140818] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:03,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:03,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-28 23:22:03,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850249825] [2021-10-28 23:22:03,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:22:03,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:03,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:22:03,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:22:03,581 INFO L87 Difference]: Start difference. First operand 1147 states and 1595 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:22:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:04,472 INFO L93 Difference]: Finished difference Result 1680 states and 2292 transitions. [2021-10-28 23:22:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:22:04,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2021-10-28 23:22:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:04,483 INFO L225 Difference]: With dead ends: 1680 [2021-10-28 23:22:04,483 INFO L226 Difference]: Without dead ends: 1680 [2021-10-28 23:22:04,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:22:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-10-28 23:22:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1467. [2021-10-28 23:22:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1157 states have (on average 1.418323249783924) internal successors, (1641), 1297 states have internal predecessors, (1641), 107 states have call successors, (107), 107 states have call predecessors, (107), 191 states have return successors, (265), 63 states have call predecessors, (265), 106 states have call successors, (265) [2021-10-28 23:22:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2013 transitions. [2021-10-28 23:22:04,555 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2013 transitions. Word has length 29 [2021-10-28 23:22:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:04,556 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 2013 transitions. [2021-10-28 23:22:04,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:22:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2013 transitions. [2021-10-28 23:22:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 23:22:04,557 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:04,558 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:04,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:04,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:04,770 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1836404925, now seen corresponding path program 1 times [2021-10-28 23:22:04,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:04,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103663425] [2021-10-28 23:22:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:04,772 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:04,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:04,773 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:04,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-28 23:22:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:22:05,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:22:05,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:05,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:05,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103663425] [2021-10-28 23:22:05,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103663425] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:05,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:05,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-10-28 23:22:05,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633158612] [2021-10-28 23:22:05,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:22:05,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:05,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:22:05,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:22:05,542 INFO L87 Difference]: Start difference. First operand 1467 states and 2013 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:22:06,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:06,612 INFO L93 Difference]: Finished difference Result 1681 states and 2147 transitions. [2021-10-28 23:22:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:22:06,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-10-28 23:22:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:06,622 INFO L225 Difference]: With dead ends: 1681 [2021-10-28 23:22:06,622 INFO L226 Difference]: Without dead ends: 1497 [2021-10-28 23:22:06,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:22:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-10-28 23:22:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1379. [2021-10-28 23:22:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1071 states have (on average 1.38468720821662) internal successors, (1483), 1209 states have internal predecessors, (1483), 107 states have call successors, (107), 107 states have call predecessors, (107), 189 states have return successors, (237), 63 states have call predecessors, (237), 106 states have call successors, (237) [2021-10-28 23:22:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1827 transitions. [2021-10-28 23:22:06,678 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1827 transitions. Word has length 30 [2021-10-28 23:22:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:06,679 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1827 transitions. [2021-10-28 23:22:06,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:22:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1827 transitions. [2021-10-28 23:22:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:22:06,682 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:06,682 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:06,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:06,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:06,895 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash -746793865, now seen corresponding path program 2 times [2021-10-28 23:22:06,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:06,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697895226] [2021-10-28 23:22:06,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:06,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:06,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:06,898 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:06,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-28 23:22:07,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:07,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:07,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:22:07,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:22:07,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:22:07,800 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:07,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697895226] [2021-10-28 23:22:07,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697895226] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:07,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:07,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-10-28 23:22:07,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646611378] [2021-10-28 23:22:07,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:22:07,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:07,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:22:07,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:22:07,802 INFO L87 Difference]: Start difference. First operand 1379 states and 1827 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 23:22:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:09,133 INFO L93 Difference]: Finished difference Result 2266 states and 3058 transitions. [2021-10-28 23:22:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:22:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2021-10-28 23:22:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:09,147 INFO L225 Difference]: With dead ends: 2266 [2021-10-28 23:22:09,147 INFO L226 Difference]: Without dead ends: 2170 [2021-10-28 23:22:09,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:22:09,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-10-28 23:22:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1993. [2021-10-28 23:22:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1543 states have (on average 1.4121840570317563) internal successors, (2179), 1753 states have internal predecessors, (2179), 165 states have call successors, (165), 153 states have call predecessors, (165), 273 states have return successors, (421), 87 states have call predecessors, (421), 164 states have call successors, (421) [2021-10-28 23:22:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2765 transitions. [2021-10-28 23:22:09,232 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2765 transitions. Word has length 39 [2021-10-28 23:22:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:09,232 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 2765 transitions. [2021-10-28 23:22:09,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 23:22:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2765 transitions. [2021-10-28 23:22:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:22:09,236 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:09,236 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:09,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:09,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:09,450 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -268124004, now seen corresponding path program 1 times [2021-10-28 23:22:09,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:09,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701036259] [2021-10-28 23:22:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:09,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:09,454 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:09,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-28 23:22:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:09,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:22:09,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:22:10,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:10,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:10,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701036259] [2021-10-28 23:22:10,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701036259] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:10,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:10,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-28 23:22:10,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397957927] [2021-10-28 23:22:10,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:22:10,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:22:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:22:10,542 INFO L87 Difference]: Start difference. First operand 1993 states and 2765 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:22:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:12,123 INFO L93 Difference]: Finished difference Result 2261 states and 2971 transitions. [2021-10-28 23:22:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:22:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2021-10-28 23:22:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:12,138 INFO L225 Difference]: With dead ends: 2261 [2021-10-28 23:22:12,138 INFO L226 Difference]: Without dead ends: 2089 [2021-10-28 23:22:12,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:22:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-10-28 23:22:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1917. [2021-10-28 23:22:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1469 states have (on average 1.3921034717494893) internal successors, (2045), 1677 states have internal predecessors, (2045), 165 states have call successors, (165), 153 states have call predecessors, (165), 271 states have return successors, (393), 87 states have call predecessors, (393), 164 states have call successors, (393) [2021-10-28 23:22:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2603 transitions. [2021-10-28 23:22:12,219 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2603 transitions. Word has length 39 [2021-10-28 23:22:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:12,219 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2603 transitions. [2021-10-28 23:22:12,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:22:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2603 transitions. [2021-10-28 23:22:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:22:12,221 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:12,221 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:12,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:12,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:12,434 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:12,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1040706548, now seen corresponding path program 1 times [2021-10-28 23:22:12,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:12,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217768216] [2021-10-28 23:22:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:12,436 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:12,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:12,437 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:12,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-28 23:22:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:12,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:22:12,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 23:22:13,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:15,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:15,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217768216] [2021-10-28 23:22:15,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217768216] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:15,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:15,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-10-28 23:22:15,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996873258] [2021-10-28 23:22:15,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:22:15,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:22:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:22:15,015 INFO L87 Difference]: Start difference. First operand 1917 states and 2603 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:22:19,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:19,705 INFO L93 Difference]: Finished difference Result 3752 states and 4910 transitions. [2021-10-28 23:22:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 23:22:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45 [2021-10-28 23:22:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:19,738 INFO L225 Difference]: With dead ends: 3752 [2021-10-28 23:22:19,738 INFO L226 Difference]: Without dead ends: 3716 [2021-10-28 23:22:19,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=977, Invalid=4279, Unknown=0, NotChecked=0, Total=5256 [2021-10-28 23:22:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-10-28 23:22:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3017. [2021-10-28 23:22:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2325 states have (on average 1.3372043010752688) internal successors, (3109), 2625 states have internal predecessors, (3109), 257 states have call successors, (257), 257 states have call predecessors, (257), 423 states have return successors, (665), 135 states have call predecessors, (665), 256 states have call successors, (665) [2021-10-28 23:22:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4031 transitions. [2021-10-28 23:22:19,882 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4031 transitions. Word has length 45 [2021-10-28 23:22:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:19,882 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4031 transitions. [2021-10-28 23:22:19,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:22:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4031 transitions. [2021-10-28 23:22:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 23:22:19,884 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:19,884 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:19,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:20,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:20,098 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:20,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:20,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1515964261, now seen corresponding path program 1 times [2021-10-28 23:22:20,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:20,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729164053] [2021-10-28 23:22:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:20,100 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:20,101 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:20,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-28 23:22:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 23:22:20,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 23:22:20,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:21,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:21,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729164053] [2021-10-28 23:22:21,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729164053] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:21,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:21,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-10-28 23:22:21,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396514310] [2021-10-28 23:22:21,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:22:21,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:22:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:22:21,454 INFO L87 Difference]: Start difference. First operand 3017 states and 4031 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 23:22:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:23,199 INFO L93 Difference]: Finished difference Result 4090 states and 5262 transitions. [2021-10-28 23:22:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:22:23,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-10-28 23:22:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:23,226 INFO L225 Difference]: With dead ends: 4090 [2021-10-28 23:22:23,226 INFO L226 Difference]: Without dead ends: 3950 [2021-10-28 23:22:23,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 23:22:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-10-28 23:22:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3716. [2021-10-28 23:22:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 2853 states have (on average 1.3168594461969856) internal successors, (3757), 3219 states have internal predecessors, (3757), 326 states have call successors, (326), 326 states have call predecessors, (326), 525 states have return successors, (779), 171 states have call predecessors, (779), 325 states have call successors, (779) [2021-10-28 23:22:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4862 transitions. [2021-10-28 23:22:23,369 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4862 transitions. Word has length 48 [2021-10-28 23:22:23,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:23,369 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 4862 transitions. [2021-10-28 23:22:23,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 23:22:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4862 transitions. [2021-10-28 23:22:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 23:22:23,371 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:23,371 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:23,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:23,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:23,586 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:23,586 INFO L85 PathProgramCache]: Analyzing trace with hash 574627678, now seen corresponding path program 1 times [2021-10-28 23:22:23,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:23,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088674805] [2021-10-28 23:22:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:23,587 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:23,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:23,588 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:23,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-28 23:22:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:22:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-28 23:22:24,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:25,216 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:25,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088674805] [2021-10-28 23:22:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088674805] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:25,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:25,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2021-10-28 23:22:25,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775677429] [2021-10-28 23:22:25,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:22:25,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:25,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:22:25,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:22:25,220 INFO L87 Difference]: Start difference. First operand 3716 states and 4862 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-28 23:22:27,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:27,648 INFO L93 Difference]: Finished difference Result 4249 states and 5467 transitions. [2021-10-28 23:22:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 23:22:27,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 59 [2021-10-28 23:22:27,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:27,675 INFO L225 Difference]: With dead ends: 4249 [2021-10-28 23:22:27,675 INFO L226 Difference]: Without dead ends: 4177 [2021-10-28 23:22:27,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=493, Invalid=1957, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 23:22:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-10-28 23:22:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4017. [2021-10-28 23:22:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 3083 states have (on average 1.3139798897178074) internal successors, (4051), 3485 states have internal predecessors, (4051), 349 states have call successors, (349), 349 states have call predecessors, (349), 573 states have return successors, (833), 183 states have call predecessors, (833), 348 states have call successors, (833) [2021-10-28 23:22:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5233 transitions. [2021-10-28 23:22:27,806 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5233 transitions. Word has length 59 [2021-10-28 23:22:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:27,806 INFO L470 AbstractCegarLoop]: Abstraction has 4017 states and 5233 transitions. [2021-10-28 23:22:27,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-28 23:22:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5233 transitions. [2021-10-28 23:22:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 23:22:27,808 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:27,809 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:27,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:28,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:28,024 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 517554629, now seen corresponding path program 2 times [2021-10-28 23:22:28,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:28,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680265654] [2021-10-28 23:22:28,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:28,026 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:28,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:28,027 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:28,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-28 23:22:28,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:28,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:28,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:22:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-28 23:22:29,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:22:31,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:31,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680265654] [2021-10-28 23:22:31,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680265654] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:31,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:31,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 32 [2021-10-28 23:22:31,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600204257] [2021-10-28 23:22:31,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:22:31,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:22:31,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:22:31,849 INFO L87 Difference]: Start difference. First operand 4017 states and 5233 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-28 23:22:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:38,928 INFO L93 Difference]: Finished difference Result 7214 states and 9448 transitions. [2021-10-28 23:22:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-28 23:22:38,938 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 70 [2021-10-28 23:22:38,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:38,976 INFO L225 Difference]: With dead ends: 7214 [2021-10-28 23:22:38,976 INFO L226 Difference]: Without dead ends: 7154 [2021-10-28 23:22:38,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1482, Invalid=6890, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 23:22:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-10-28 23:22:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 5071. [2021-10-28 23:22:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 3907 states have (on average 1.3137957512157665) internal successors, (5133), 4429 states have internal predecessors, (5133), 421 states have call successors, (421), 421 states have call predecessors, (421), 731 states have return successors, (1057), 221 states have call predecessors, (1057), 420 states have call successors, (1057) [2021-10-28 23:22:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 6611 transitions. [2021-10-28 23:22:39,216 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 6611 transitions. Word has length 70 [2021-10-28 23:22:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:39,216 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 6611 transitions. [2021-10-28 23:22:39,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-28 23:22:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 6611 transitions. [2021-10-28 23:22:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 23:22:39,219 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:39,219 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:39,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:39,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:39,435 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1608789574, now seen corresponding path program 1 times [2021-10-28 23:22:39,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:39,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546869849] [2021-10-28 23:22:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:39,436 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:39,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:39,438 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:39,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-28 23:22:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:22:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-28 23:22:40,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-28 23:22:40,785 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:40,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546869849] [2021-10-28 23:22:40,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546869849] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:40,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:40,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-28 23:22:40,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967629582] [2021-10-28 23:22:40,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:22:40,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:22:40,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:22:40,788 INFO L87 Difference]: Start difference. First operand 5071 states and 6611 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:22:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:41,363 INFO L93 Difference]: Finished difference Result 9835 states and 12944 transitions. [2021-10-28 23:22:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:22:41,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2021-10-28 23:22:41,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:41,402 INFO L225 Difference]: With dead ends: 9835 [2021-10-28 23:22:41,402 INFO L226 Difference]: Without dead ends: 9835 [2021-10-28 23:22:41,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:22:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9835 states. [2021-10-28 23:22:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9835 to 9811. [2021-10-28 23:22:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9811 states, 7495 states have (on average 1.313809206137425) internal successors, (9847), 8623 states have internal predecessors, (9847), 778 states have call successors, (778), 778 states have call predecessors, (778), 1526 states have return successors, (2299), 410 states have call predecessors, (2299), 777 states have call successors, (2299) [2021-10-28 23:22:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9811 states to 9811 states and 12924 transitions. [2021-10-28 23:22:41,750 INFO L78 Accepts]: Start accepts. Automaton has 9811 states and 12924 transitions. Word has length 71 [2021-10-28 23:22:41,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:41,751 INFO L470 AbstractCegarLoop]: Abstraction has 9811 states and 12924 transitions. [2021-10-28 23:22:41,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:22:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9811 states and 12924 transitions. [2021-10-28 23:22:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 23:22:41,753 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:41,753 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 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] [2021-10-28 23:22:41,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:41,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:41,968 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:41,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:41,969 INFO L85 PathProgramCache]: Analyzing trace with hash -511357765, now seen corresponding path program 1 times [2021-10-28 23:22:41,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:41,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300619016] [2021-10-28 23:22:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:41,970 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:41,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:41,971 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:41,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-28 23:22:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:42,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 23:22:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:42,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-28 23:22:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 23:22:43,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 23:22:44,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:44,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300619016] [2021-10-28 23:22:44,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300619016] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:44,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:44,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-28 23:22:44,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421353297] [2021-10-28 23:22:44,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:22:44,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:44,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:22:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:22:44,250 INFO L87 Difference]: Start difference. First operand 9811 states and 12924 transitions. Second operand has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-10-28 23:22:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:46,543 INFO L93 Difference]: Finished difference Result 16626 states and 22220 transitions. [2021-10-28 23:22:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:22:46,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 79 [2021-10-28 23:22:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:46,610 INFO L225 Difference]: With dead ends: 16626 [2021-10-28 23:22:46,611 INFO L226 Difference]: Without dead ends: 16626 [2021-10-28 23:22:46,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:22:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16626 states. [2021-10-28 23:22:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16626 to 14338. [2021-10-28 23:22:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14338 states, 11019 states have (on average 1.329793992195299) internal successors, (14653), 12646 states have internal predecessors, (14653), 1114 states have call successors, (1114), 1114 states have call predecessors, (1114), 2194 states have return successors, (3523), 578 states have call predecessors, (3523), 1113 states have call successors, (3523) [2021-10-28 23:22:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14338 states to 14338 states and 19290 transitions. [2021-10-28 23:22:47,051 INFO L78 Accepts]: Start accepts. Automaton has 14338 states and 19290 transitions. Word has length 79 [2021-10-28 23:22:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:47,052 INFO L470 AbstractCegarLoop]: Abstraction has 14338 states and 19290 transitions. [2021-10-28 23:22:47,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-10-28 23:22:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 14338 states and 19290 transitions. [2021-10-28 23:22:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 23:22:47,060 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:47,061 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 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] [2021-10-28 23:22:47,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:47,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:47,277 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:47,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:47,278 INFO L85 PathProgramCache]: Analyzing trace with hash -511357764, now seen corresponding path program 1 times [2021-10-28 23:22:47,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:47,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217253651] [2021-10-28 23:22:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:47,278 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:47,280 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:47,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-28 23:22:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:48,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 23:22:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:48,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-28 23:22:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 23:22:49,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:22:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 23:22:52,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:22:52,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217253651] [2021-10-28 23:22:52,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217253651] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:22:52,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:22:52,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-28 23:22:52,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306592257] [2021-10-28 23:22:52,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:22:52,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:22:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:22:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:22:52,219 INFO L87 Difference]: Start difference. First operand 14338 states and 19290 transitions. Second operand has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 23:22:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:58,901 INFO L93 Difference]: Finished difference Result 22975 states and 31271 transitions. [2021-10-28 23:22:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:22:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 79 [2021-10-28 23:22:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:58,974 INFO L225 Difference]: With dead ends: 22975 [2021-10-28 23:22:58,974 INFO L226 Difference]: Without dead ends: 22975 [2021-10-28 23:22:58,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 23:22:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22975 states. [2021-10-28 23:22:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22975 to 19568. [2021-10-28 23:22:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19568 states, 15241 states have (on average 1.3503707105832952) internal successors, (20581), 17376 states have internal predecessors, (20581), 1446 states have call successors, (1446), 1446 states have call predecessors, (1446), 2870 states have return successors, (4913), 746 states have call predecessors, (4913), 1445 states have call successors, (4913) [2021-10-28 23:22:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19568 states to 19568 states and 26940 transitions. [2021-10-28 23:22:59,525 INFO L78 Accepts]: Start accepts. Automaton has 19568 states and 26940 transitions. Word has length 79 [2021-10-28 23:22:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:59,526 INFO L470 AbstractCegarLoop]: Abstraction has 19568 states and 26940 transitions. [2021-10-28 23:22:59,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 23:22:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 19568 states and 26940 transitions. [2021-10-28 23:22:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-28 23:22:59,530 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:59,530 INFO L513 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 4, 3, 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] [2021-10-28 23:22:59,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:59,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:22:59,747 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:22:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:59,747 INFO L85 PathProgramCache]: Analyzing trace with hash 175036294, now seen corresponding path program 1 times [2021-10-28 23:22:59,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:22:59,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171458166] [2021-10-28 23:22:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:59,748 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:22:59,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:22:59,750 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:22:59,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-28 23:23:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:23:00,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:23:00,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-10-28 23:23:01,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:23:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 29 proven. 42 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-28 23:23:01,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:23:01,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171458166] [2021-10-28 23:23:01,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171458166] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:23:01,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:23:01,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-28 23:23:01,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798137556] [2021-10-28 23:23:01,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:23:01,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:23:01,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:23:01,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:23:01,673 INFO L87 Difference]: Start difference. First operand 19568 states and 26940 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-28 23:23:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:03,116 INFO L93 Difference]: Finished difference Result 26145 states and 35199 transitions. [2021-10-28 23:23:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:23:03,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 98 [2021-10-28 23:23:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:03,208 INFO L225 Difference]: With dead ends: 26145 [2021-10-28 23:23:03,208 INFO L226 Difference]: Without dead ends: 24927 [2021-10-28 23:23:03,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:23:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24927 states. [2021-10-28 23:23:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24927 to 23061. [2021-10-28 23:23:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23061 states, 17872 states have (on average 1.3545210384959714) internal successors, (24208), 20491 states have internal predecessors, (24208), 1698 states have call successors, (1698), 1698 states have call predecessors, (1698), 3480 states have return successors, (5737), 872 states have call predecessors, (5737), 1697 states have call successors, (5737) [2021-10-28 23:23:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23061 states to 23061 states and 31643 transitions. [2021-10-28 23:23:03,929 INFO L78 Accepts]: Start accepts. Automaton has 23061 states and 31643 transitions. Word has length 98 [2021-10-28 23:23:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:03,929 INFO L470 AbstractCegarLoop]: Abstraction has 23061 states and 31643 transitions. [2021-10-28 23:23:03,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-28 23:23:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 23061 states and 31643 transitions. [2021-10-28 23:23:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-28 23:23:03,936 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:03,936 INFO L513 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 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] [2021-10-28 23:23:03,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:04,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:23:04,154 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:23:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash -159277390, now seen corresponding path program 2 times [2021-10-28 23:23:04,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:23:04,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470671862] [2021-10-28 23:23:04,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:23:04,156 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:23:04,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:23:04,157 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:23:04,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-28 23:23:05,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:23:05,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:23:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:23:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 92 proven. 37 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 23:23:05,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:23:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 48 proven. 57 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-10-28 23:23:06,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:23:06,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470671862] [2021-10-28 23:23:06,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470671862] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:23:06,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:23:06,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-10-28 23:23:06,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706633807] [2021-10-28 23:23:06,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:23:06,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:23:06,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:23:06,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:23:06,756 INFO L87 Difference]: Start difference. First operand 23061 states and 31643 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-28 23:23:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:09,810 INFO L93 Difference]: Finished difference Result 65936 states and 93992 transitions. [2021-10-28 23:23:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 23:23:09,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 107 [2021-10-28 23:23:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:10,145 INFO L225 Difference]: With dead ends: 65936 [2021-10-28 23:23:10,145 INFO L226 Difference]: Without dead ends: 64256 [2021-10-28 23:23:10,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 23:23:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64256 states. [2021-10-28 23:23:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64256 to 61721. [2021-10-28 23:23:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61721 states, 48744 states have (on average 1.338667323157722) internal successors, (65252), 54131 states have internal predecessors, (65252), 5038 states have call successors, (5038), 5038 states have call predecessors, (5038), 7928 states have return successors, (18397), 2552 states have call predecessors, (18397), 5037 states have call successors, (18397) [2021-10-28 23:23:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61721 states to 61721 states and 88687 transitions. [2021-10-28 23:23:12,193 INFO L78 Accepts]: Start accepts. Automaton has 61721 states and 88687 transitions. Word has length 107 [2021-10-28 23:23:12,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:12,194 INFO L470 AbstractCegarLoop]: Abstraction has 61721 states and 88687 transitions. [2021-10-28 23:23:12,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-28 23:23:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 61721 states and 88687 transitions. [2021-10-28 23:23:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-28 23:23:12,199 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:12,199 INFO L513 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 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] [2021-10-28 23:23:12,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:12,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:23:12,422 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 23:23:12,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:12,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1851960145, now seen corresponding path program 1 times [2021-10-28 23:23:12,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:23:12,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713526565] [2021-10-28 23:23:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:12,423 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:23:12,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:23:12,424 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:23:12,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-28 23:23:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:23:13,579 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:23:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:23:14,047 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 23:23:14,048 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:23:14,049 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:23:14,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-28 23:23:14,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-28 23:23:14,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-28 23:23:14,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-28 23:23:14,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-28 23:23:14,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-28 23:23:14,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-28 23:23:14,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-28 23:23:14,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-28 23:23:14,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-28 23:23:14,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-28 23:23:14,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-28 23:23:14,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-28 23:23:14,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-28 23:23:14,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:23:14,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:23:14,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:23:14,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:23:14,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:23:14,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:14,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:23:14,276 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:14,279 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:23:14,341 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 23:23:14,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:23:14 BoogieIcfgContainer [2021-10-28 23:23:14,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:23:14,401 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:23:14,401 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:23:14,402 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:23:14,402 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:21:52" (3/4) ... [2021-10-28 23:23:14,405 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 23:23:14,405 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:23:14,406 INFO L168 Benchmark]: Toolchain (without parser) took 83290.52 ms. Allocated memory was 62.9 MB in the beginning and 673.2 MB in the end (delta: 610.3 MB). Free memory was 45.1 MB in the beginning and 210.6 MB in the end (delta: -165.5 MB). Peak memory consumption was 444.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:14,407 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 48.2 MB. Free memory was 29.3 MB in the beginning and 29.2 MB in the end (delta: 35.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:23:14,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 530.19 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 41.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:14,408 INFO L168 Benchmark]: Boogie Preprocessor took 88.80 ms. Allocated memory is still 62.9 MB. Free memory was 41.9 MB in the beginning and 38.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:14,408 INFO L168 Benchmark]: RCFGBuilder took 1032.12 ms. Allocated memory is still 62.9 MB. Free memory was 38.6 MB in the beginning and 28.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:14,409 INFO L168 Benchmark]: TraceAbstraction took 81627.24 ms. Allocated memory was 62.9 MB in the beginning and 673.2 MB in the end (delta: 610.3 MB). Free memory was 27.9 MB in the beginning and 211.7 MB in the end (delta: -183.7 MB). Peak memory consumption was 427.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:14,409 INFO L168 Benchmark]: Witness Printer took 3.99 ms. Allocated memory is still 673.2 MB. Free memory was 211.7 MB in the beginning and 210.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:23:14,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 48.2 MB. Free memory was 29.3 MB in the beginning and 29.2 MB in the end (delta: 35.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 530.19 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 41.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 88.80 ms. Allocated memory is still 62.9 MB. Free memory was 41.9 MB in the beginning and 38.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1032.12 ms. Allocated memory is still 62.9 MB. Free memory was 38.6 MB in the beginning and 28.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 81627.24 ms. Allocated memory was 62.9 MB in the beginning and 673.2 MB in the end (delta: 610.3 MB). Free memory was 27.9 MB in the beginning and 211.7 MB in the end (delta: -183.7 MB). Peak memory consumption was 427.8 MB. Max. memory is 16.1 GB. * Witness Printer took 3.99 ms. Allocated memory is still 673.2 MB. Free memory was 211.7 MB in the beginning and 210.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=18, \old(pc4)=28, \old(res4)=22, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, pc4++=1, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L576] EXPR t4->next VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, t4->next={0:0}, x1={1:0}, x4={0:0}] [L576] x4 = t4->next [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc1++=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, \result=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 81.4s, OverallIterations: 24, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 38.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3107 SDtfs, 16252 SDslu, 5564 SDs, 0 SdLazy, 14139 SolverSat, 3928 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2263 GetRequests, 1651 SyntacticMatches, 10 SemanticMatches, 602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6128 ImplicationChecksByTransitivity, 18.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61721occurred in iteration=23, InterpolantAutomatonStates: 468, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.4s AutomataMinimizationTime, 23 MinimizatonAttempts, 14350 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 20.7s InterpolantComputationTime, 1039 NumberOfCodeBlocks, 1039 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1814 ConstructedInterpolants, 20 QuantifiedInterpolants, 11966 SizeOfPredicates, 83 NumberOfNonLiveVariables, 6593 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 46 InterpolantComputations, 14 PerfectInterpolantSequences, 1431/2450 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 23:23:14,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93cfcd9f-dd4a-4c50-921e-bfe2d058d0d7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...