./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f7d8c0c2bedd5f6035fbcd638269863119be7003 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:19:57,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:19:57,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:19:57,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:19:57,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:19:57,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:19:57,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:19:57,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:19:57,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:19:57,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:19:57,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:19:57,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:19:57,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:19:57,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:19:57,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:19:57,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:19:57,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:19:57,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:19:57,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:19:57,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:19:57,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:19:57,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:19:57,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:19:57,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:19:57,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:19:57,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:19:57,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:19:57,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:19:57,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:19:57,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:19:57,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:19:57,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:19:57,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:19:57,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:19:57,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:19:57,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:19:57,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:19:57,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:19:57,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:19:57,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:19:57,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:19:57,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:19:57,521 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:19:57,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:19:57,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:19:57,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:19:57,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:19:57,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:19:57,531 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:19:57,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:19:57,531 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:19:57,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:19:57,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:19:57,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:19:57,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:19:57,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:19:57,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:19:57,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:19:57,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:19:57,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:19:57,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:19:57,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:19:57,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:19:57,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:19:57,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:19:57,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:19:57,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:19:57,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:19:57,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:19:57,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:19:57,538 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:19:57,539 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:19:57,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:19:57,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:19:57,540 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_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7d8c0c2bedd5f6035fbcd638269863119be7003 [2021-10-15 20:19:57,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:19:57,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:19:57,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:19:57,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:19:57,871 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:19:57,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-10-15 20:19:57,944 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/data/a086ae1c5/0892aded4c374cb9bda30be0e8dff07c/FLAGb27e350fb [2021-10-15 20:19:58,529 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:19:58,530 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-10-15 20:19:58,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/data/a086ae1c5/0892aded4c374cb9bda30be0e8dff07c/FLAGb27e350fb [2021-10-15 20:19:58,831 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/data/a086ae1c5/0892aded4c374cb9bda30be0e8dff07c [2021-10-15 20:19:58,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:19:58,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:19:58,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:19:58,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:19:58,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:19:58,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:19:58" (1/1) ... [2021-10-15 20:19:58,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6658c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:58, skipping insertion in model container [2021-10-15 20:19:58,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:19:58" (1/1) ... [2021-10-15 20:19:58,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:19:58,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:19:59,228 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-10-15 20:19:59,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:19:59,251 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:19:59,338 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-10-15 20:19:59,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:19:59,375 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:19:59,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59 WrapperNode [2021-10-15 20:19:59,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:19:59,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:19:59,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:19:59,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:19:59,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:19:59,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:19:59,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:19:59,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:19:59,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:19:59,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:19:59,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:19:59,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:19:59,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (1/1) ... [2021-10-15 20:19:59,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:19:59,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:59,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:19:59,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:19:59,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:19:59,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:19:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 20:19:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:19:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 20:19:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:19:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 20:19:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:19:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:19:59,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:19:59,937 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:19:59,938 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-15 20:19:59,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:19:59 BoogieIcfgContainer [2021-10-15 20:19:59,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:19:59,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:19:59,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:19:59,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:19:59,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:19:58" (1/3) ... [2021-10-15 20:19:59,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488ff36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:19:59, skipping insertion in model container [2021-10-15 20:19:59,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:59" (2/3) ... [2021-10-15 20:19:59,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488ff36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:19:59, skipping insertion in model container [2021-10-15 20:19:59,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:19:59" (3/3) ... [2021-10-15 20:19:59,957 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2021-10-15 20:19:59,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:19:59,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:20:00,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:20:00,018 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:20:00,019 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:20:00,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 19 places, 24 transitions, 48 flow [2021-10-15 20:20:00,052 INFO L129 PetriNetUnfolder]: 6/24 cut-off events. [2021-10-15 20:20:00,053 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:20:00,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 24 events. 6/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 20:20:00,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 24 transitions, 48 flow [2021-10-15 20:20:00,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 18 transitions, 36 flow [2021-10-15 20:20:00,063 INFO L129 PetriNetUnfolder]: 4/17 cut-off events. [2021-10-15 20:20:00,063 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:20:00,063 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:20:00,064 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:20:00,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:20:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:20:00,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1724284531, now seen corresponding path program 1 times [2021-10-15 20:20:00,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:20:00,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103630916] [2021-10-15 20:20:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:00,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:20:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:20:00,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:20:00,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103630916] [2021-10-15 20:20:00,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103630916] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:20:00,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:20:00,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:20:00,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345768885] [2021-10-15 20:20:00,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:20:00,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:20:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:20:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:20:00,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 24 [2021-10-15 20:20:00,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 18 transitions, 36 flow. Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:20:00,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 24 [2021-10-15 20:20:00,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:20:00,302 INFO L129 PetriNetUnfolder]: 2/16 cut-off events. [2021-10-15 20:20:00,303 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:20:00,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 16 events. 2/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 2/16 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2021-10-15 20:20:00,305 INFO L132 encePairwiseOnDemand]: 22/24 looper letters, 0 selfloop transitions, 0 changer transitions 0/16 dead transitions. [2021-10-15 20:20:00,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 16 transitions, 32 flow [2021-10-15 20:20:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:20:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:20:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 44 transitions. [2021-10-15 20:20:00,319 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-10-15 20:20:00,319 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 44 transitions. [2021-10-15 20:20:00,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 44 transitions. [2021-10-15 20:20:00,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:20:00,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 44 transitions. [2021-10-15 20:20:00,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,331 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,333 INFO L186 Difference]: Start difference. First operand has 15 places, 18 transitions, 36 flow. Second operand 2 states and 44 transitions. [2021-10-15 20:20:00,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 16 transitions, 32 flow [2021-10-15 20:20:00,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 16 transitions, 32 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:20:00,338 INFO L242 Difference]: Finished difference. Result has 16 places, 16 transitions, 32 flow [2021-10-15 20:20:00,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=16, PETRI_TRANSITIONS=16} [2021-10-15 20:20:00,341 INFO L334 CegarLoopForPetriNet]: 15 programPoint places, 1 predicate places. [2021-10-15 20:20:00,341 INFO L470 AbstractCegarLoop]: Abstraction has has 16 places, 16 transitions, 32 flow [2021-10-15 20:20:00,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,342 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:20:00,342 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:20:00,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:20:00,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:20:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:20:00,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1724493068, now seen corresponding path program 1 times [2021-10-15 20:20:00,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:20:00,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147586] [2021-10-15 20:20:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:00,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:20:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:20:00,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:20:00,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147586] [2021-10-15 20:20:00,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:20:00,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:20:00,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:20:00,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142402279] [2021-10-15 20:20:00,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:20:00,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:20:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:20:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:20:00,449 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 24 [2021-10-15 20:20:00,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 16 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:20:00,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 24 [2021-10-15 20:20:00,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:20:00,479 INFO L129 PetriNetUnfolder]: 2/21 cut-off events. [2021-10-15 20:20:00,486 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:20:00,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 27. Up to 5 conditions per place. [2021-10-15 20:20:00,487 INFO L132 encePairwiseOnDemand]: 21/24 looper letters, 4 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2021-10-15 20:20:00,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 18 transitions, 48 flow [2021-10-15 20:20:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:20:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:20:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2021-10-15 20:20:00,492 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8055555555555556 [2021-10-15 20:20:00,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 58 transitions. [2021-10-15 20:20:00,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 58 transitions. [2021-10-15 20:20:00,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:20:00,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 58 transitions. [2021-10-15 20:20:00,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,499 INFO L186 Difference]: Start difference. First operand has 16 places, 16 transitions, 32 flow. Second operand 3 states and 58 transitions. [2021-10-15 20:20:00,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 18 transitions, 48 flow [2021-10-15 20:20:00,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 18 transitions, 48 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:20:00,504 INFO L242 Difference]: Finished difference. Result has 19 places, 17 transitions, 44 flow [2021-10-15 20:20:00,504 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2021-10-15 20:20:00,505 INFO L334 CegarLoopForPetriNet]: 15 programPoint places, 4 predicate places. [2021-10-15 20:20:00,505 INFO L470 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 44 flow [2021-10-15 20:20:00,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:20:00,506 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:20:00,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:20:00,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:20:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:20:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1461984396, now seen corresponding path program 1 times [2021-10-15 20:20:00,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:20:00,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466843780] [2021-10-15 20:20:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:00,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:20:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:20:00,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:20:00,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466843780] [2021-10-15 20:20:00,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466843780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:20:00,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085333554] [2021-10-15 20:20:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:00,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:20:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:20:00,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:20:00,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:20:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:20:00,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:20:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:20:00,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085333554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:20:00,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:20:00,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 20:20:00,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960287395] [2021-10-15 20:20:00,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:20:00,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:20:00,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:20:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:20:00,783 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 24 [2021-10-15 20:20:00,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:20:00,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 24 [2021-10-15 20:20:00,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:20:00,808 INFO L129 PetriNetUnfolder]: 2/22 cut-off events. [2021-10-15 20:20:00,808 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:20:00,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 22 events. 2/22 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/22 useless extension candidates. Maximal degree in co-relation 34. Up to 4 conditions per place. [2021-10-15 20:20:00,809 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 3 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2021-10-15 20:20:00,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 62 flow [2021-10-15 20:20:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:20:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:20:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2021-10-15 20:20:00,811 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7916666666666666 [2021-10-15 20:20:00,811 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 76 transitions. [2021-10-15 20:20:00,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 76 transitions. [2021-10-15 20:20:00,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:20:00,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 76 transitions. [2021-10-15 20:20:00,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,815 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,815 INFO L186 Difference]: Start difference. First operand has 19 places, 17 transitions, 44 flow. Second operand 4 states and 76 transitions. [2021-10-15 20:20:00,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 62 flow [2021-10-15 20:20:00,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 60 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:20:00,818 INFO L242 Difference]: Finished difference. Result has 23 places, 18 transitions, 62 flow [2021-10-15 20:20:00,818 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2021-10-15 20:20:00,818 INFO L334 CegarLoopForPetriNet]: 15 programPoint places, 8 predicate places. [2021-10-15 20:20:00,818 INFO L470 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 62 flow [2021-10-15 20:20:00,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:00,819 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:20:00,819 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:20:00,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:20:01,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-15 20:20:01,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:20:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:20:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1187811828, now seen corresponding path program 2 times [2021-10-15 20:20:01,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:20:01,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698582377] [2021-10-15 20:20:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:01,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:20:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:20:01,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:20:01,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698582377] [2021-10-15 20:20:01,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698582377] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:20:01,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:20:01,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:20:01,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852166746] [2021-10-15 20:20:01,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:20:01,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:20:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:20:01,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:20:01,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 24 [2021-10-15 20:20:01,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:20:01,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 24 [2021-10-15 20:20:01,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:20:01,253 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-10-15 20:20:01,254 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 20:20:01,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 24 events. 2/24 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 45. Up to 5 conditions per place. [2021-10-15 20:20:01,254 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 4 selfloop transitions, 3 changer transitions 0/20 dead transitions. [2021-10-15 20:20:01,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 20 transitions, 80 flow [2021-10-15 20:20:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:20:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:20:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2021-10-15 20:20:01,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-10-15 20:20:01,257 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 72 transitions. [2021-10-15 20:20:01,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 72 transitions. [2021-10-15 20:20:01,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:20:01,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 72 transitions. [2021-10-15 20:20:01,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,259 INFO L186 Difference]: Start difference. First operand has 23 places, 18 transitions, 62 flow. Second operand 4 states and 72 transitions. [2021-10-15 20:20:01,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 20 transitions, 80 flow [2021-10-15 20:20:01,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 20 transitions, 76 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 20:20:01,262 INFO L242 Difference]: Finished difference. Result has 26 places, 19 transitions, 72 flow [2021-10-15 20:20:01,262 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2021-10-15 20:20:01,262 INFO L334 CegarLoopForPetriNet]: 15 programPoint places, 11 predicate places. [2021-10-15 20:20:01,262 INFO L470 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 72 flow [2021-10-15 20:20:01,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,263 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:20:01,263 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:20:01,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:20:01,264 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:20:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:20:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash -920932553, now seen corresponding path program 1 times [2021-10-15 20:20:01,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:20:01,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603210340] [2021-10-15 20:20:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:01,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:20:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:20:01,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:20:01,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603210340] [2021-10-15 20:20:01,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603210340] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:20:01,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554815922] [2021-10-15 20:20:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:01,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:20:01,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:20:01,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:20:01,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:20:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:20:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:20:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:20:01,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554815922] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:20:01,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:20:01,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-15 20:20:01,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749660334] [2021-10-15 20:20:01,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:20:01,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:20:01,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:20:01,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:20:01,609 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 24 [2021-10-15 20:20:01,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:20:01,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 24 [2021-10-15 20:20:01,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:20:01,659 INFO L129 PetriNetUnfolder]: 2/25 cut-off events. [2021-10-15 20:20:01,660 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 20:20:01,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 25 events. 2/25 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 2 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2021-10-15 20:20:01,662 INFO L132 encePairwiseOnDemand]: 19/24 looper letters, 3 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2021-10-15 20:20:01,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 21 transitions, 92 flow [2021-10-15 20:20:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:20:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:20:01,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2021-10-15 20:20:01,668 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7416666666666667 [2021-10-15 20:20:01,668 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 89 transitions. [2021-10-15 20:20:01,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 89 transitions. [2021-10-15 20:20:01,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:20:01,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 89 transitions. [2021-10-15 20:20:01,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,672 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,672 INFO L186 Difference]: Start difference. First operand has 26 places, 19 transitions, 72 flow. Second operand 5 states and 89 transitions. [2021-10-15 20:20:01,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 21 transitions, 92 flow [2021-10-15 20:20:01,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:20:01,678 INFO L242 Difference]: Finished difference. Result has 30 places, 20 transitions, 91 flow [2021-10-15 20:20:01,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2021-10-15 20:20:01,679 INFO L334 CegarLoopForPetriNet]: 15 programPoint places, 15 predicate places. [2021-10-15 20:20:01,679 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 91 flow [2021-10-15 20:20:01,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:01,680 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:20:01,680 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:20:01,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:20:01,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:20:01,902 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:20:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:20:01,903 INFO L82 PathProgramCache]: Analyzing trace with hash -199718982, now seen corresponding path program 2 times [2021-10-15 20:20:01,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:20:01,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210336404] [2021-10-15 20:20:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:01,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:20:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:20:02,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:20:02,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210336404] [2021-10-15 20:20:02,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210336404] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:20:02,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923439007] [2021-10-15 20:20:02,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:20:02,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:20:02,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:20:02,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:20:02,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:20:02,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:20:02,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:20:02,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-15 20:20:02,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:20:02,608 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 [2021-10-15 20:20:02,676 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:20:02,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 20:20:02,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:20:02,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:20:02,982 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-15 20:20:02,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-15 20:20:03,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-10-15 20:20:03,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-10-15 20:20:03,302 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-10-15 20:20:03,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 73 [2021-10-15 20:20:03,332 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-15 20:20:03,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 88 [2021-10-15 20:20:03,918 INFO L354 Elim1Store]: treesize reduction 140, result has 13.0 percent of original size [2021-10-15 20:20:03,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 211 treesize of output 137 [2021-10-15 20:20:03,951 INFO L354 Elim1Store]: treesize reduction 104, result has 12.6 percent of original size [2021-10-15 20:20:03,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 159 treesize of output 121 [2021-10-15 20:20:04,825 INFO L354 Elim1Store]: treesize reduction 270, result has 8.2 percent of original size [2021-10-15 20:20:04,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 149 treesize of output 125 [2021-10-15 20:20:04,878 INFO L354 Elim1Store]: treesize reduction 228, result has 8.8 percent of original size [2021-10-15 20:20:04,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 120 treesize of output 110 [2021-10-15 20:20:06,006 INFO L354 Elim1Store]: treesize reduction 67, result has 10.7 percent of original size [2021-10-15 20:20:06,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 119 treesize of output 88 [2021-10-15 20:20:06,029 INFO L354 Elim1Store]: treesize reduction 49, result has 14.0 percent of original size [2021-10-15 20:20:06,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 60 [2021-10-15 20:20:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:20:06,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923439007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:20:06,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:20:06,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-15 20:20:06,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179490944] [2021-10-15 20:20:06,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-15 20:20:06,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:20:06,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-15 20:20:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-10-15 20:20:06,051 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 24 [2021-10-15 20:20:06,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 91 flow. Second operand has 25 states, 25 states have (on average 9.2) internal successors, (230), 25 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:06,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:20:06,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 24 [2021-10-15 20:20:06,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:20:10,005 INFO L129 PetriNetUnfolder]: 3/48 cut-off events. [2021-10-15 20:20:10,006 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-10-15 20:20:10,006 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 48 events. 3/48 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 135. Up to 14 conditions per place. [2021-10-15 20:20:10,007 INFO L132 encePairwiseOnDemand]: 15/24 looper letters, 18 selfloop transitions, 13 changer transitions 1/39 dead transitions. [2021-10-15 20:20:10,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 216 flow [2021-10-15 20:20:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:20:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:20:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 144 transitions. [2021-10-15 20:20:10,012 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2021-10-15 20:20:10,012 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 144 transitions. [2021-10-15 20:20:10,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 144 transitions. [2021-10-15 20:20:10,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:20:10,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 144 transitions. [2021-10-15 20:20:10,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 10.285714285714286) internal successors, (144), 14 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,016 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,016 INFO L186 Difference]: Start difference. First operand has 30 places, 20 transitions, 91 flow. Second operand 14 states and 144 transitions. [2021-10-15 20:20:10,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 216 flow [2021-10-15 20:20:10,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 210 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:20:10,020 INFO L242 Difference]: Finished difference. Result has 45 places, 31 transitions, 172 flow [2021-10-15 20:20:10,020 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=172, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2021-10-15 20:20:10,021 INFO L334 CegarLoopForPetriNet]: 15 programPoint places, 30 predicate places. [2021-10-15 20:20:10,021 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 172 flow [2021-10-15 20:20:10,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.2) internal successors, (230), 25 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:20:10,021 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:20:10,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:20:10,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:20:10,222 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:20:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:20:10,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1396788093, now seen corresponding path program 3 times [2021-10-15 20:20:10,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:20:10,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575177802] [2021-10-15 20:20:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:10,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:20:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:20:10,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:20:10,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575177802] [2021-10-15 20:20:10,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575177802] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:20:10,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:20:10,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:20:10,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625177390] [2021-10-15 20:20:10,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:20:10,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:20:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:20:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:20:10,339 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 24 [2021-10-15 20:20:10,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:20:10,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 24 [2021-10-15 20:20:10,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:20:10,399 INFO L129 PetriNetUnfolder]: 1/39 cut-off events. [2021-10-15 20:20:10,399 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2021-10-15 20:20:10,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 39 events. 1/39 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 2/41 useless extension candidates. Maximal degree in co-relation 114. Up to 7 conditions per place. [2021-10-15 20:20:10,401 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 3 selfloop transitions, 4 changer transitions 4/30 dead transitions. [2021-10-15 20:20:10,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 30 transitions, 180 flow [2021-10-15 20:20:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:20:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:20:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2021-10-15 20:20:10,405 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2021-10-15 20:20:10,405 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 104 transitions. [2021-10-15 20:20:10,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 104 transitions. [2021-10-15 20:20:10,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:20:10,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 104 transitions. [2021-10-15 20:20:10,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,409 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,410 INFO L186 Difference]: Start difference. First operand has 45 places, 31 transitions, 172 flow. Second operand 6 states and 104 transitions. [2021-10-15 20:20:10,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 30 transitions, 180 flow [2021-10-15 20:20:10,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 30 transitions, 163 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-10-15 20:20:10,421 INFO L242 Difference]: Finished difference. Result has 46 places, 25 transitions, 122 flow [2021-10-15 20:20:10,421 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=46, PETRI_TRANSITIONS=25} [2021-10-15 20:20:10,421 INFO L334 CegarLoopForPetriNet]: 15 programPoint places, 31 predicate places. [2021-10-15 20:20:10,422 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 25 transitions, 122 flow [2021-10-15 20:20:10,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,423 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:20:10,423 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:20:10,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:20:10,424 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:20:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:20:10,424 INFO L82 PathProgramCache]: Analyzing trace with hash -268851374, now seen corresponding path program 4 times [2021-10-15 20:20:10,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:20:10,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769190694] [2021-10-15 20:20:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:20:10,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:20:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:20:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:20:10,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:20:10,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769190694] [2021-10-15 20:20:10,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769190694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:20:10,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046916620] [2021-10-15 20:20:10,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:20:10,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:20:10,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:20:10,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:20:10,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:20:10,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:20:10,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:20:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:20:10,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:20:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:20:10,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046916620] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:20:10,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:20:10,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-10-15 20:20:10,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673731207] [2021-10-15 20:20:10,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:20:10,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:20:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:20:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:20:10,808 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 24 [2021-10-15 20:20:10,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 25 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:20:10,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 24 [2021-10-15 20:20:10,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:20:10,829 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-10-15 20:20:10,830 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-10-15 20:20:10,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 13 events. 0/13 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:20:10,830 INFO L132 encePairwiseOnDemand]: 21/24 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-10-15 20:20:10,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 12 transitions, 68 flow [2021-10-15 20:20:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:20:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:20:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2021-10-15 20:20:10,832 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2021-10-15 20:20:10,832 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 92 transitions. [2021-10-15 20:20:10,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 92 transitions. [2021-10-15 20:20:10,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:20:10,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 92 transitions. [2021-10-15 20:20:10,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,835 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,835 INFO L186 Difference]: Start difference. First operand has 46 places, 25 transitions, 122 flow. Second operand 5 states and 92 transitions. [2021-10-15 20:20:10,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 12 transitions, 68 flow [2021-10-15 20:20:10,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 12 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-10-15 20:20:10,836 INFO L242 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2021-10-15 20:20:10,837 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2021-10-15 20:20:10,837 INFO L334 CegarLoopForPetriNet]: 15 programPoint places, 13 predicate places. [2021-10-15 20:20:10,837 INFO L470 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2021-10-15 20:20:10,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:20:10,840 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:20:10,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:20:11,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 20:20:11,064 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:20:11,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:20:11 BoogieIcfgContainer [2021-10-15 20:20:11,068 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:20:11,069 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:20:11,069 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:20:11,070 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:20:11,070 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:19:59" (3/4) ... [2021-10-15 20:20:11,074 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:20:11,086 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 20:20:11,087 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-15 20:20:11,087 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:20:11,088 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:20:11,135 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:20:11,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:20:11,140 INFO L168 Benchmark]: Toolchain (without parser) took 12305.15 ms. Allocated memory was 81.8 MB in the beginning and 148.9 MB in the end (delta: 67.1 MB). Free memory was 45.0 MB in the beginning and 66.7 MB in the end (delta: -21.8 MB). Peak memory consumption was 44.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:20:11,140 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 81.8 MB. Free memory is still 62.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:20:11,141 INFO L168 Benchmark]: CACSL2BoogieTranslator took 540.32 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 44.8 MB in the beginning and 73.4 MB in the end (delta: -28.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:20:11,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.46 ms. Allocated memory is still 102.8 MB. Free memory was 73.4 MB in the beginning and 71.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:20:11,142 INFO L168 Benchmark]: Boogie Preprocessor took 37.90 ms. Allocated memory is still 102.8 MB. Free memory was 71.3 MB in the beginning and 69.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:20:11,145 INFO L168 Benchmark]: RCFGBuilder took 477.12 ms. Allocated memory is still 102.8 MB. Free memory was 69.9 MB in the beginning and 58.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:20:11,146 INFO L168 Benchmark]: TraceAbstraction took 11126.62 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 57.7 MB in the beginning and 69.9 MB in the end (delta: -12.2 MB). Peak memory consumption was 34.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:20:11,146 INFO L168 Benchmark]: Witness Printer took 69.88 ms. Allocated memory is still 148.9 MB. Free memory was 69.9 MB in the beginning and 66.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:20:11,149 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 81.8 MB. Free memory is still 62.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 540.32 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 44.8 MB in the beginning and 73.4 MB in the end (delta: -28.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.46 ms. Allocated memory is still 102.8 MB. Free memory was 73.4 MB in the beginning and 71.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.90 ms. Allocated memory is still 102.8 MB. Free memory was 71.3 MB in the beginning and 69.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 477.12 ms. Allocated memory is still 102.8 MB. Free memory was 69.9 MB in the beginning and 58.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11126.62 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 57.7 MB in the beginning and 69.9 MB in the end (delta: -12.2 MB). Peak memory consumption was 34.3 MB. Max. memory is 16.1 GB. * Witness Printer took 69.88 ms. Allocated memory is still 148.9 MB. Free memory was 69.9 MB in the beginning and 66.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 609]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11056.4ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 4367.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 57 SDslu, 57 SDs, 0 SdLazy, 385 SolverSat, 36 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2541.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2345.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 82.2ms SsaConstructionTime, 370.0ms SatisfiabilityAnalysisTime, 4777.1ms InterpolantComputationTime, 234 NumberOfCodeBlocks, 233 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 222 ConstructedInterpolants, 5 QuantifiedInterpolants, 2287 SizeOfPredicates, 35 NumberOfNonLiveVariables, 620 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 75/107 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:20:11,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dd0fbf-f294-492b-a35e-1cba37eb0efe/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...