./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ --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 a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:36:11,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:36:11,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:36:11,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:36:11,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:36:11,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:36:11,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:36:11,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:36:11,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:36:11,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:36:11,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:36:11,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:36:11,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:36:11,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:36:11,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:36:11,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:36:11,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:36:11,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:36:11,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:36:11,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:36:11,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:36:11,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:36:11,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:36:11,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:36:11,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:36:11,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:36:11,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:36:11,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:36:11,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:36:11,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:36:11,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:36:11,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:36:11,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:36:11,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:36:11,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:36:11,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:36:11,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:36:11,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:36:11,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:36:11,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:36:11,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:36:11,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:36:11,410 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:36:11,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:36:11,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:36:11,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:36:11,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:36:11,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:36:11,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:36:11,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:36:11,431 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:36:11,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:36:11,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:36:11,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:36:11,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:36:11,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:36:11,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:36:11,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:36:11,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:36:11,434 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:36:11,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:36:11,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:36:11,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:36:11,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:36:11,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:36:11,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:36:11,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:36:11,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:36:11,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:36:11,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:36:11,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:36:11,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:36:11,437 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:36:11,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:36:11,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:36:11,438 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_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2022-10-17 10:36:11,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:36:11,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:36:11,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:36:11,767 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:36:11,767 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:36:11,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-10-17 10:36:11,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/data/0e7652d39/6f295b6288ef427686872780b9c848ac/FLAGa7b93bca4 [2022-10-17 10:36:12,256 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:36:12,257 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-10-17 10:36:12,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/data/0e7652d39/6f295b6288ef427686872780b9c848ac/FLAGa7b93bca4 [2022-10-17 10:36:12,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/data/0e7652d39/6f295b6288ef427686872780b9c848ac [2022-10-17 10:36:12,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:36:12,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:36:12,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:36:12,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:36:12,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:36:12,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ba0189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12, skipping insertion in model container [2022-10-17 10:36:12,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:36:12,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:36:12,579 WARN L230 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_db45ec0a-91e8-4bc3-84b5-070416aa4236/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-10-17 10:36:12,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:36:12,594 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:36:12,628 WARN L230 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_db45ec0a-91e8-4bc3-84b5-070416aa4236/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-10-17 10:36:12,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:36:12,644 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:36:12,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12 WrapperNode [2022-10-17 10:36:12,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:36:12,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:36:12,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:36:12,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:36:12,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,687 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-10-17 10:36:12,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:36:12,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:36:12,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:36:12,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:36:12,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,720 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:36:12,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:36:12,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:36:12,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:36:12,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (1/1) ... [2022-10-17 10:36:12,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:36:12,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:36:12,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:36:12,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:36:12,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:36:12,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 10:36:12,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 10:36:12,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 10:36:12,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 10:36:12,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-10-17 10:36:12,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-10-17 10:36:12,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:36:12,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:36:12,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:36:12,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 10:36:12,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 10:36:12,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:36:12,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:36:12,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:36:12,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:36:12,826 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:36:12,935 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:36:12,937 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:36:13,376 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:36:13,487 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:36:13,488 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 10:36:13,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:36:13 BoogieIcfgContainer [2022-10-17 10:36:13,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:36:13,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:36:13,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:36:13,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:36:13,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:36:12" (1/3) ... [2022-10-17 10:36:13,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51954b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:36:13, skipping insertion in model container [2022-10-17 10:36:13,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:36:12" (2/3) ... [2022-10-17 10:36:13,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51954b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:36:13, skipping insertion in model container [2022-10-17 10:36:13,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:36:13" (3/3) ... [2022-10-17 10:36:13,510 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2022-10-17 10:36:13,521 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:36:13,531 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:36:13,531 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:36:13,532 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:36:13,607 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-10-17 10:36:13,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 254 flow [2022-10-17 10:36:13,739 INFO L130 PetriNetUnfolder]: 8/112 cut-off events. [2022-10-17 10:36:13,740 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-10-17 10:36:13,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 8/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-10-17 10:36:13,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 115 transitions, 254 flow [2022-10-17 10:36:13,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 101 transitions, 220 flow [2022-10-17 10:36:13,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:36:13,800 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6c3a07aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:36:13,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 10:36:13,848 INFO L130 PetriNetUnfolder]: 8/100 cut-off events. [2022-10-17 10:36:13,848 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-10-17 10:36:13,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:36:13,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:36:13,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:36:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:36:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1701118085, now seen corresponding path program 1 times [2022-10-17 10:36:13,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:36:13,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765312870] [2022-10-17 10:36:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:36:13,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:36:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:36:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:14,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:36:14,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765312870] [2022-10-17 10:36:14,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765312870] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:36:14,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:36:14,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:36:14,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981181707] [2022-10-17 10:36:14,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:36:14,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:36:14,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:36:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:36:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:36:14,262 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 115 [2022-10-17 10:36:14,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 220 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:14,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:36:14,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 115 [2022-10-17 10:36:14,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:36:14,469 INFO L130 PetriNetUnfolder]: 59/245 cut-off events. [2022-10-17 10:36:14,470 INFO L131 PetriNetUnfolder]: For 67/68 co-relation queries the response was YES. [2022-10-17 10:36:14,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 245 events. 59/245 cut-off events. For 67/68 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 748 event pairs, 23 based on Foata normal form. 52/266 useless extension candidates. Maximal degree in co-relation 255. Up to 85 conditions per place. [2022-10-17 10:36:14,479 INFO L137 encePairwiseOnDemand]: 110/115 looper letters, 10 selfloop transitions, 0 changer transitions 2/96 dead transitions. [2022-10-17 10:36:14,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 96 transitions, 230 flow [2022-10-17 10:36:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:36:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:36:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 213 transitions. [2022-10-17 10:36:14,502 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9260869565217391 [2022-10-17 10:36:14,503 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 213 transitions. [2022-10-17 10:36:14,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 213 transitions. [2022-10-17 10:36:14,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:36:14,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 213 transitions. [2022-10-17 10:36:14,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:14,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:14,533 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:14,534 INFO L175 Difference]: Start difference. First operand has 103 places, 101 transitions, 220 flow. Second operand 2 states and 213 transitions. [2022-10-17 10:36:14,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 96 transitions, 230 flow [2022-10-17 10:36:14,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 218 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-10-17 10:36:14,545 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 194 flow [2022-10-17 10:36:14,548 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=194, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2022-10-17 10:36:14,552 INFO L287 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2022-10-17 10:36:14,553 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 194 flow [2022-10-17 10:36:14,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:14,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:36:14,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:36:14,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:36:14,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:36:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:36:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1473782596, now seen corresponding path program 1 times [2022-10-17 10:36:14,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:36:14,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060621696] [2022-10-17 10:36:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:36:14,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:36:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:36:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:16,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:36:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060621696] [2022-10-17 10:36:16,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060621696] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:36:16,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:36:16,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:36:16,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562522070] [2022-10-17 10:36:16,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:36:16,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:36:16,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:36:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:36:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:36:16,070 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 115 [2022-10-17 10:36:16,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 73.28571428571429) internal successors, (513), 7 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:16,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:36:16,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 115 [2022-10-17 10:36:16,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:36:16,764 INFO L130 PetriNetUnfolder]: 301/710 cut-off events. [2022-10-17 10:36:16,764 INFO L131 PetriNetUnfolder]: For 17/29 co-relation queries the response was YES. [2022-10-17 10:36:16,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1227 conditions, 710 events. 301/710 cut-off events. For 17/29 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3532 event pairs, 50 based on Foata normal form. 0/630 useless extension candidates. Maximal degree in co-relation 1224. Up to 309 conditions per place. [2022-10-17 10:36:16,774 INFO L137 encePairwiseOnDemand]: 105/115 looper letters, 54 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2022-10-17 10:36:16,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 121 transitions, 384 flow [2022-10-17 10:36:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:36:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:36:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 619 transitions. [2022-10-17 10:36:16,783 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6728260869565217 [2022-10-17 10:36:16,784 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 619 transitions. [2022-10-17 10:36:16,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 619 transitions. [2022-10-17 10:36:16,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:36:16,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 619 transitions. [2022-10-17 10:36:16,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 77.375) internal successors, (619), 8 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:16,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:16,795 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:16,795 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 194 flow. Second operand 8 states and 619 transitions. [2022-10-17 10:36:16,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 121 transitions, 384 flow [2022-10-17 10:36:16,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 121 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:36:16,801 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 260 flow [2022-10-17 10:36:16,801 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=260, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2022-10-17 10:36:16,802 INFO L287 CegarLoopForPetriNet]: 103 programPoint places, 3 predicate places. [2022-10-17 10:36:16,803 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 260 flow [2022-10-17 10:36:16,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.28571428571429) internal successors, (513), 7 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:16,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:36:16,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:36:16,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:36:16,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:36:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:36:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash -642650888, now seen corresponding path program 1 times [2022-10-17 10:36:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:36:16,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759801720] [2022-10-17 10:36:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:36:16,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:36:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:36:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:18,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:36:18,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759801720] [2022-10-17 10:36:18,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759801720] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:36:18,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:36:18,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:36:18,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481736647] [2022-10-17 10:36:18,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:36:18,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:36:18,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:36:18,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:36:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:36:18,009 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 115 [2022-10-17 10:36:18,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 74.42857142857143) internal successors, (521), 7 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:18,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:36:18,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 115 [2022-10-17 10:36:18,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:36:18,519 INFO L130 PetriNetUnfolder]: 431/937 cut-off events. [2022-10-17 10:36:18,519 INFO L131 PetriNetUnfolder]: For 503/519 co-relation queries the response was YES. [2022-10-17 10:36:18,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 937 events. 431/937 cut-off events. For 503/519 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4922 event pairs, 43 based on Foata normal form. 0/848 useless extension candidates. Maximal degree in co-relation 2139. Up to 347 conditions per place. [2022-10-17 10:36:18,532 INFO L137 encePairwiseOnDemand]: 104/115 looper letters, 57 selfloop transitions, 11 changer transitions 0/125 dead transitions. [2022-10-17 10:36:18,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 125 transitions, 492 flow [2022-10-17 10:36:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:36:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 10:36:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 546 transitions. [2022-10-17 10:36:18,537 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2022-10-17 10:36:18,537 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 546 transitions. [2022-10-17 10:36:18,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 546 transitions. [2022-10-17 10:36:18,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:36:18,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 546 transitions. [2022-10-17 10:36:18,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:18,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:18,545 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:18,546 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 260 flow. Second operand 7 states and 546 transitions. [2022-10-17 10:36:18,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 125 transitions, 492 flow [2022-10-17 10:36:18,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 479 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 10:36:18,554 INFO L231 Difference]: Finished difference. Result has 110 places, 104 transitions, 289 flow [2022-10-17 10:36:18,554 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=289, PETRI_PLACES=110, PETRI_TRANSITIONS=104} [2022-10-17 10:36:18,555 INFO L287 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-10-17 10:36:18,556 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 289 flow [2022-10-17 10:36:18,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.42857142857143) internal successors, (521), 7 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:18,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:36:18,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:36:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:36:18,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:36:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:36:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1413551109, now seen corresponding path program 1 times [2022-10-17 10:36:18,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:36:18,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117870166] [2022-10-17 10:36:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:36:18,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:36:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:36:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:19,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:36:19,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117870166] [2022-10-17 10:36:19,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117870166] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:36:19,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:36:19,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:36:19,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831796706] [2022-10-17 10:36:19,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:36:19,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:36:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:36:19,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:36:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:36:19,050 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 115 [2022-10-17 10:36:19,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 104 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:19,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:36:19,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 115 [2022-10-17 10:36:19,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:36:19,591 INFO L130 PetriNetUnfolder]: 837/1649 cut-off events. [2022-10-17 10:36:19,591 INFO L131 PetriNetUnfolder]: For 968/976 co-relation queries the response was YES. [2022-10-17 10:36:19,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4062 conditions, 1649 events. 837/1649 cut-off events. For 968/976 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9426 event pairs, 65 based on Foata normal form. 8/1561 useless extension candidates. Maximal degree in co-relation 4053. Up to 543 conditions per place. [2022-10-17 10:36:19,613 INFO L137 encePairwiseOnDemand]: 107/115 looper letters, 72 selfloop transitions, 16 changer transitions 0/160 dead transitions. [2022-10-17 10:36:19,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 160 transitions, 668 flow [2022-10-17 10:36:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:36:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:36:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 768 transitions. [2022-10-17 10:36:19,617 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8347826086956521 [2022-10-17 10:36:19,617 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 768 transitions. [2022-10-17 10:36:19,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 768 transitions. [2022-10-17 10:36:19,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:36:19,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 768 transitions. [2022-10-17 10:36:19,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:19,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:19,631 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:19,632 INFO L175 Difference]: Start difference. First operand has 110 places, 104 transitions, 289 flow. Second operand 8 states and 768 transitions. [2022-10-17 10:36:19,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 160 transitions, 668 flow [2022-10-17 10:36:19,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 160 transitions, 658 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-10-17 10:36:19,642 INFO L231 Difference]: Finished difference. Result has 119 places, 116 transitions, 405 flow [2022-10-17 10:36:19,644 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=405, PETRI_PLACES=119, PETRI_TRANSITIONS=116} [2022-10-17 10:36:19,648 INFO L287 CegarLoopForPetriNet]: 103 programPoint places, 16 predicate places. [2022-10-17 10:36:19,649 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 405 flow [2022-10-17 10:36:19,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:19,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:36:19,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:36:19,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:36:19,650 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:36:19,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:36:19,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1514536197, now seen corresponding path program 2 times [2022-10-17 10:36:19,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:36:19,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384797991] [2022-10-17 10:36:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:36:19,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:36:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:36:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:20,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:36:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384797991] [2022-10-17 10:36:20,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384797991] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:36:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627865535] [2022-10-17 10:36:20,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:36:20,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:36:20,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:36:20,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:36:20,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:36:20,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:36:20,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:36:20,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:36:20,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:36:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:36:20,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:36:20,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627865535] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:36:20,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:36:20,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-10-17 10:36:20,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080938020] [2022-10-17 10:36:20,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:36:20,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:36:20,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:36:20,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:36:20,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:36:20,757 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 115 [2022-10-17 10:36:20,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 116 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:20,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:36:20,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 115 [2022-10-17 10:36:20,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:36:21,205 INFO L130 PetriNetUnfolder]: 384/1060 cut-off events. [2022-10-17 10:36:21,206 INFO L131 PetriNetUnfolder]: For 1187/1261 co-relation queries the response was YES. [2022-10-17 10:36:21,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 1060 events. 384/1060 cut-off events. For 1187/1261 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6493 event pairs, 75 based on Foata normal form. 14/1032 useless extension candidates. Maximal degree in co-relation 2883. Up to 374 conditions per place. [2022-10-17 10:36:21,226 INFO L137 encePairwiseOnDemand]: 106/115 looper letters, 58 selfloop transitions, 16 changer transitions 0/145 dead transitions. [2022-10-17 10:36:21,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 145 transitions, 718 flow [2022-10-17 10:36:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:36:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:36:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 697 transitions. [2022-10-17 10:36:21,230 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7576086956521739 [2022-10-17 10:36:21,230 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 697 transitions. [2022-10-17 10:36:21,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 697 transitions. [2022-10-17 10:36:21,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:36:21,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 697 transitions. [2022-10-17 10:36:21,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 87.125) internal successors, (697), 8 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:21,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:21,237 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:21,237 INFO L175 Difference]: Start difference. First operand has 119 places, 116 transitions, 405 flow. Second operand 8 states and 697 transitions. [2022-10-17 10:36:21,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 145 transitions, 718 flow [2022-10-17 10:36:21,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 145 transitions, 714 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-10-17 10:36:21,251 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 510 flow [2022-10-17 10:36:21,251 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=510, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2022-10-17 10:36:21,255 INFO L287 CegarLoopForPetriNet]: 103 programPoint places, 25 predicate places. [2022-10-17 10:36:21,256 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 510 flow [2022-10-17 10:36:21,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:21,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:36:21,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:36:21,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:36:21,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:36:21,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:36:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:36:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash -897924923, now seen corresponding path program 1 times [2022-10-17 10:36:21,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:36:21,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46734243] [2022-10-17 10:36:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:36:21,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:36:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:36:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:22,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:36:22,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46734243] [2022-10-17 10:36:22,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46734243] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:36:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272277657] [2022-10-17 10:36:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:36:22,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:36:22,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:36:22,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:36:22,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:36:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:36:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:36:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:36:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:22,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:36:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:22,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272277657] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:36:22,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:36:22,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 17 [2022-10-17 10:36:22,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964586037] [2022-10-17 10:36:22,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:36:22,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:36:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:36:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:36:22,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:36:22,867 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 115 [2022-10-17 10:36:22,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 510 flow. Second operand has 17 states, 17 states have (on average 77.17647058823529) internal successors, (1312), 17 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:22,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:36:22,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 115 [2022-10-17 10:36:22,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:36:24,562 INFO L130 PetriNetUnfolder]: 1723/3247 cut-off events. [2022-10-17 10:36:24,562 INFO L131 PetriNetUnfolder]: For 7564/7585 co-relation queries the response was YES. [2022-10-17 10:36:24,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10765 conditions, 3247 events. 1723/3247 cut-off events. For 7564/7585 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 19099 event pairs, 13 based on Foata normal form. 85/3309 useless extension candidates. Maximal degree in co-relation 10747. Up to 773 conditions per place. [2022-10-17 10:36:24,667 INFO L137 encePairwiseOnDemand]: 96/115 looper letters, 202 selfloop transitions, 67 changer transitions 0/329 dead transitions. [2022-10-17 10:36:24,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 329 transitions, 2184 flow [2022-10-17 10:36:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-17 10:36:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-10-17 10:36:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2196 transitions. [2022-10-17 10:36:24,676 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7072463768115942 [2022-10-17 10:36:24,676 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2196 transitions. [2022-10-17 10:36:24,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2196 transitions. [2022-10-17 10:36:24,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:36:24,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2196 transitions. [2022-10-17 10:36:24,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 81.33333333333333) internal successors, (2196), 27 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:24,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 115.0) internal successors, (3220), 28 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:24,699 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 115.0) internal successors, (3220), 28 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:24,699 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 510 flow. Second operand 27 states and 2196 transitions. [2022-10-17 10:36:24,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 329 transitions, 2184 flow [2022-10-17 10:36:24,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 329 transitions, 2157 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-10-17 10:36:24,725 INFO L231 Difference]: Finished difference. Result has 166 places, 166 transitions, 1112 flow [2022-10-17 10:36:24,726 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1112, PETRI_PLACES=166, PETRI_TRANSITIONS=166} [2022-10-17 10:36:24,729 INFO L287 CegarLoopForPetriNet]: 103 programPoint places, 63 predicate places. [2022-10-17 10:36:24,729 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 166 transitions, 1112 flow [2022-10-17 10:36:24,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.17647058823529) internal successors, (1312), 17 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:24,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:36:24,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:36:24,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:36:24,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:36:24,956 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:36:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:36:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1355721273, now seen corresponding path program 2 times [2022-10-17 10:36:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:36:24,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899267908] [2022-10-17 10:36:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:36:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:36:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:36:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:25,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:36:25,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899267908] [2022-10-17 10:36:25,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899267908] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:36:25,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357998086] [2022-10-17 10:36:25,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:36:25,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:36:25,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:36:25,652 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:36:25,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:36:25,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:36:25,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:36:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:36:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:36:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:36:25,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:36:25,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357998086] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:36:25,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:36:25,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-10-17 10:36:25,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217865034] [2022-10-17 10:36:25,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:36:25,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:36:25,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:36:25,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:36:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:36:25,982 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 115 [2022-10-17 10:36:25,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 166 transitions, 1112 flow. Second operand has 7 states, 7 states have (on average 80.85714285714286) internal successors, (566), 7 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:25,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:36:25,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 115 [2022-10-17 10:36:25,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:36:27,500 INFO L130 PetriNetUnfolder]: 2523/5370 cut-off events. [2022-10-17 10:36:27,501 INFO L131 PetriNetUnfolder]: For 32490/32514 co-relation queries the response was YES. [2022-10-17 10:36:27,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23151 conditions, 5370 events. 2523/5370 cut-off events. For 32490/32514 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 41698 event pairs, 754 based on Foata normal form. 148/5405 useless extension candidates. Maximal degree in co-relation 23118. Up to 2392 conditions per place. [2022-10-17 10:36:27,671 INFO L137 encePairwiseOnDemand]: 107/115 looper letters, 162 selfloop transitions, 10 changer transitions 0/243 dead transitions. [2022-10-17 10:36:27,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 243 transitions, 2235 flow [2022-10-17 10:36:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:36:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:36:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 673 transitions. [2022-10-17 10:36:27,679 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7315217391304348 [2022-10-17 10:36:27,680 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 673 transitions. [2022-10-17 10:36:27,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 673 transitions. [2022-10-17 10:36:27,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:36:27,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 673 transitions. [2022-10-17 10:36:27,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 84.125) internal successors, (673), 8 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:27,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:27,688 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:27,688 INFO L175 Difference]: Start difference. First operand has 166 places, 166 transitions, 1112 flow. Second operand 8 states and 673 transitions. [2022-10-17 10:36:27,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 243 transitions, 2235 flow [2022-10-17 10:36:27,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 243 transitions, 1947 flow, removed 118 selfloop flow, removed 5 redundant places. [2022-10-17 10:36:27,866 INFO L231 Difference]: Finished difference. Result has 169 places, 167 transitions, 982 flow [2022-10-17 10:36:27,866 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=982, PETRI_PLACES=169, PETRI_TRANSITIONS=167} [2022-10-17 10:36:27,867 INFO L287 CegarLoopForPetriNet]: 103 programPoint places, 66 predicate places. [2022-10-17 10:36:27,867 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 167 transitions, 982 flow [2022-10-17 10:36:27,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.85714285714286) internal successors, (566), 7 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:36:27,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:36:27,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:36:27,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:36:28,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:36:28,084 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:36:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:36:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1903090995, now seen corresponding path program 3 times [2022-10-17 10:36:28,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:36:28,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156946879] [2022-10-17 10:36:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:36:28,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:36:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:36:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:31,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:36:31,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156946879] [2022-10-17 10:36:31,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156946879] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:36:31,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145391854] [2022-10-17 10:36:31,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:36:31,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:36:31,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:36:32,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:36:32,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db45ec0a-91e8-4bc3-84b5-070416aa4236/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:36:32,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 10:36:32,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:36:32,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2022-10-17 10:36:32,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:36:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:36:34,038 INFO L328 TraceCheckSpWp]: Computing backward predicates...