./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8 --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 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --- 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-e04fb08 [2022-11-16 12:05:27,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:05:27,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:05:27,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:05:27,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:05:27,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:05:27,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:05:27,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:05:27,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:05:27,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:05:27,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:05:27,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:05:27,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:05:27,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:05:27,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:05:27,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:05:27,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:05:27,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:05:27,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:05:27,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:05:27,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:05:27,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:05:27,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:05:27,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:05:27,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:05:27,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:05:27,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:05:27,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:05:27,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:05:27,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:05:27,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:05:27,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:05:27,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:05:27,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:05:27,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:05:27,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:05:27,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:05:27,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:05:27,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:05:27,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:05:27,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:05:27,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:05:27,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:05:27,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:05:27,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:05:27,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:05:27,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:05:27,422 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:05:27,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:05:27,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:05:27,423 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:05:27,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:05:27,424 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:05:27,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:05:27,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:05:27,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:05:27,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:05:27,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:05:27,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:05:27,426 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:05:27,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:05:27,426 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:05:27,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:05:27,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:05:27,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:05:27,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:05:27,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:05:27,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:05:27,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:05:27,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:05:27,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:05:27,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:05:27,429 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:05:27,429 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:05:27,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:05:27,436 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_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d [2022-11-16 12:05:27,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:05:27,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:05:27,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:05:27,718 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:05:27,719 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:05:27,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-11-16 12:05:27,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/data/f72f36b04/73b34ad7dcb0453bb7f9f9a9885790a8/FLAG453302776 [2022-11-16 12:05:28,373 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:05:28,374 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-11-16 12:05:28,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/data/f72f36b04/73b34ad7dcb0453bb7f9f9a9885790a8/FLAG453302776 [2022-11-16 12:05:28,619 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/data/f72f36b04/73b34ad7dcb0453bb7f9f9a9885790a8 [2022-11-16 12:05:28,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:05:28,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:05:28,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:05:28,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:05:28,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:05:28,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:05:28" (1/1) ... [2022-11-16 12:05:28,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55faeb08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:28, skipping insertion in model container [2022-11-16 12:05:28,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:05:28" (1/1) ... [2022-11-16 12:05:28,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:05:28,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:05:29,275 WARN L229 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_fb62aae6-8edd-4217-b6ef-714faa613ec4/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-11-16 12:05:29,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:05:29,328 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:05:29,394 WARN L229 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_fb62aae6-8edd-4217-b6ef-714faa613ec4/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-11-16 12:05:29,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:05:29,455 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:05:29,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29 WrapperNode [2022-11-16 12:05:29,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:05:29,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:05:29,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:05:29,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:05:29,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,518 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2022-11-16 12:05:29,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:05:29,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:05:29,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:05:29,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:05:29,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,545 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:05:29,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:05:29,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:05:29,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:05:29,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (1/1) ... [2022-11-16 12:05:29,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:05:29,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:29,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:05:29,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:05:29,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:05:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:05:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:05:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:05:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 12:05:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:05:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 12:05:29,631 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 12:05:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:05:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:05:29,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:05:29,633 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:05:29,772 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:05:29,775 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:05:30,149 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:05:30,158 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:05:30,158 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-16 12:05:30,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:05:30 BoogieIcfgContainer [2022-11-16 12:05:30,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:05:30,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:05:30,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:05:30,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:05:30,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:05:28" (1/3) ... [2022-11-16 12:05:30,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48934208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:05:30, skipping insertion in model container [2022-11-16 12:05:30,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:29" (2/3) ... [2022-11-16 12:05:30,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48934208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:05:30, skipping insertion in model container [2022-11-16 12:05:30,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:05:30" (3/3) ... [2022-11-16 12:05:30,171 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2022-11-16 12:05:30,180 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:05:30,192 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:05:30,193 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:05:30,193 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:05:30,269 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 12:05:30,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 155 transitions, 318 flow [2022-11-16 12:05:30,409 INFO L130 PetriNetUnfolder]: 24/195 cut-off events. [2022-11-16 12:05:30,409 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:05:30,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 195 events. 24/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 548 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2022-11-16 12:05:30,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 155 transitions, 318 flow [2022-11-16 12:05:30,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 150 transitions, 305 flow [2022-11-16 12:05:30,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:05:30,470 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;@548474db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:05:30,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:05:30,530 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-16 12:05:30,531 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:05:30,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:30,532 INFO L209 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] [2022-11-16 12:05:30,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1208602920, now seen corresponding path program 1 times [2022-11-16 12:05:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:30,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758279299] [2022-11-16 12:05:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:30,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:30,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758279299] [2022-11-16 12:05:30,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758279299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:30,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:30,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:30,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883658718] [2022-11-16 12:05:30,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:30,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:05:30,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:05:30,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:05:30,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 155 [2022-11-16 12:05:30,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 305 flow. Second operand has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:30,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:30,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 155 [2022-11-16 12:05:30,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:30,963 INFO L130 PetriNetUnfolder]: 1/166 cut-off events. [2022-11-16 12:05:30,963 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:05:30,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 166 events. 1/166 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 353 event pairs, 0 based on Foata normal form. 22/181 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2022-11-16 12:05:30,966 INFO L137 encePairwiseOnDemand]: 138/155 looper letters, 1 selfloop transitions, 0 changer transitions 0/132 dead transitions. [2022-11-16 12:05:30,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 271 flow [2022-11-16 12:05:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:05:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:05:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 288 transitions. [2022-11-16 12:05:30,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9290322580645162 [2022-11-16 12:05:30,981 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 288 transitions. [2022-11-16 12:05:30,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 288 transitions. [2022-11-16 12:05:30,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:30,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 288 transitions. [2022-11-16 12:05:30,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 144.0) internal successors, (288), 2 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:30,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:30,995 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:30,997 INFO L175 Difference]: Start difference. First operand has 135 places, 150 transitions, 305 flow. Second operand 2 states and 288 transitions. [2022-11-16 12:05:30,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 271 flow [2022-11-16 12:05:31,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 132 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:31,006 INFO L231 Difference]: Finished difference. Result has 135 places, 132 transitions, 269 flow [2022-11-16 12:05:31,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=269, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2022-11-16 12:05:31,012 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2022-11-16 12:05:31,013 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 269 flow [2022-11-16 12:05:31,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:31,014 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:31,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:05:31,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:31,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1029271965, now seen corresponding path program 1 times [2022-11-16 12:05:31,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:31,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639285146] [2022-11-16 12:05:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:05:31,112 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:05:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:05:31,229 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:05:31,230 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:05:31,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:05:31,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:05:31,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:05:31,234 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-16 12:05:31,237 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:05:31,237 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:05:31,275 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:05:31,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 223 transitions, 464 flow [2022-11-16 12:05:31,346 INFO L130 PetriNetUnfolder]: 45/328 cut-off events. [2022-11-16 12:05:31,346 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 12:05:31,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 328 events. 45/328 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1172 event pairs, 0 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-11-16 12:05:31,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 223 transitions, 464 flow [2022-11-16 12:05:31,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 223 transitions, 464 flow [2022-11-16 12:05:31,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:05:31,358 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;@548474db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:05:31,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:05:31,371 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-16 12:05:31,372 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:05:31,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:31,372 INFO L209 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] [2022-11-16 12:05:31,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:31,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2071023080, now seen corresponding path program 1 times [2022-11-16 12:05:31,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:31,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297090724] [2022-11-16 12:05:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:31,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:31,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:31,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297090724] [2022-11-16 12:05:31,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297090724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:31,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:31,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:31,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935414350] [2022-11-16 12:05:31,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:31,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:05:31,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:31,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:05:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:05:31,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 223 [2022-11-16 12:05:31,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 223 transitions, 464 flow. Second operand has 2 states, 2 states have (on average 189.5) internal successors, (379), 2 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:31,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 223 [2022-11-16 12:05:31,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:31,562 INFO L130 PetriNetUnfolder]: 5/285 cut-off events. [2022-11-16 12:05:31,563 INFO L131 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-11-16 12:05:31,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 285 events. 5/285 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 925 event pairs, 0 based on Foata normal form. 64/337 useless extension candidates. Maximal degree in co-relation 175. Up to 7 conditions per place. [2022-11-16 12:05:31,566 INFO L137 encePairwiseOnDemand]: 194/223 looper letters, 4 selfloop transitions, 0 changer transitions 0/193 dead transitions. [2022-11-16 12:05:31,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 193 transitions, 412 flow [2022-11-16 12:05:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:05:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:05:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 411 transitions. [2022-11-16 12:05:31,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.92152466367713 [2022-11-16 12:05:31,570 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 411 transitions. [2022-11-16 12:05:31,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 411 transitions. [2022-11-16 12:05:31,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:31,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 411 transitions. [2022-11-16 12:05:31,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,582 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,582 INFO L175 Difference]: Start difference. First operand has 195 places, 223 transitions, 464 flow. Second operand 2 states and 411 transitions. [2022-11-16 12:05:31,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 193 transitions, 412 flow [2022-11-16 12:05:31,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 193 transitions, 412 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:31,589 INFO L231 Difference]: Finished difference. Result has 195 places, 193 transitions, 404 flow [2022-11-16 12:05:31,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=404, PETRI_PLACES=195, PETRI_TRANSITIONS=193} [2022-11-16 12:05:31,591 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, 0 predicate places. [2022-11-16 12:05:31,591 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 193 transitions, 404 flow [2022-11-16 12:05:31,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 189.5) internal successors, (379), 2 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:31,592 INFO L209 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] [2022-11-16 12:05:31,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:05:31,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:31,593 INFO L85 PathProgramCache]: Analyzing trace with hash -716392407, now seen corresponding path program 1 times [2022-11-16 12:05:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:31,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778685296] [2022-11-16 12:05:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:31,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:31,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:31,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778685296] [2022-11-16 12:05:31,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778685296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:31,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:31,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:05:31,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401680552] [2022-11-16 12:05:31,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:31,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:05:31,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:31,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:05:31,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:05:31,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 223 [2022-11-16 12:05:31,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 193 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:31,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 223 [2022-11-16 12:05:31,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:31,801 INFO L130 PetriNetUnfolder]: 4/264 cut-off events. [2022-11-16 12:05:31,802 INFO L131 PetriNetUnfolder]: For 14/33 co-relation queries the response was YES. [2022-11-16 12:05:31,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 264 events. 4/264 cut-off events. For 14/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 783 event pairs, 0 based on Foata normal form. 1/255 useless extension candidates. Maximal degree in co-relation 295. Up to 16 conditions per place. [2022-11-16 12:05:31,806 INFO L137 encePairwiseOnDemand]: 220/223 looper letters, 13 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2022-11-16 12:05:31,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 197 transitions, 442 flow [2022-11-16 12:05:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:05:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:05:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-11-16 12:05:31,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8400597907324364 [2022-11-16 12:05:31,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-11-16 12:05:31,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-11-16 12:05:31,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:31,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-11-16 12:05:31,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,815 INFO L175 Difference]: Start difference. First operand has 195 places, 193 transitions, 404 flow. Second operand 3 states and 562 transitions. [2022-11-16 12:05:31,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 197 transitions, 442 flow [2022-11-16 12:05:31,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 197 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:31,820 INFO L231 Difference]: Finished difference. Result has 198 places, 194 transitions, 416 flow [2022-11-16 12:05:31,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=198, PETRI_TRANSITIONS=194} [2022-11-16 12:05:31,821 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, 3 predicate places. [2022-11-16 12:05:31,822 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 194 transitions, 416 flow [2022-11-16 12:05:31,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:31,823 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:31,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:05:31,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:31,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1316226527, now seen corresponding path program 1 times [2022-11-16 12:05:31,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:31,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927086677] [2022-11-16 12:05:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:31,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:05:31,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:05:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:05:31,909 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:05:31,910 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:05:31,910 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:05:31,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:05:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:05:31,911 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:05:31,911 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:05:31,911 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:05:31,952 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:05:31,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 291 transitions, 612 flow [2022-11-16 12:05:32,071 INFO L130 PetriNetUnfolder]: 71/494 cut-off events. [2022-11-16 12:05:32,071 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-16 12:05:32,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 494 events. 71/494 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1987 event pairs, 1 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 336. Up to 16 conditions per place. [2022-11-16 12:05:32,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 291 transitions, 612 flow [2022-11-16 12:05:32,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 291 transitions, 612 flow [2022-11-16 12:05:32,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:05:32,101 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;@548474db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:05:32,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:05:32,112 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-16 12:05:32,112 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:05:32,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:32,112 INFO L209 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] [2022-11-16 12:05:32,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2003761240, now seen corresponding path program 1 times [2022-11-16 12:05:32,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:32,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972995918] [2022-11-16 12:05:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:32,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:32,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:32,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972995918] [2022-11-16 12:05:32,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972995918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:32,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:32,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072743765] [2022-11-16 12:05:32,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:32,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:05:32,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:05:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:05:32,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 291 [2022-11-16 12:05:32,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 291 transitions, 612 flow. Second operand has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:32,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 291 [2022-11-16 12:05:32,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:32,339 INFO L130 PetriNetUnfolder]: 11/430 cut-off events. [2022-11-16 12:05:32,340 INFO L131 PetriNetUnfolder]: For 56/73 co-relation queries the response was YES. [2022-11-16 12:05:32,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 430 events. 11/430 cut-off events. For 56/73 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1667 event pairs, 1 based on Foata normal form. 174/585 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2022-11-16 12:05:32,346 INFO L137 encePairwiseOnDemand]: 250/291 looper letters, 6 selfloop transitions, 0 changer transitions 0/249 dead transitions. [2022-11-16 12:05:32,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 249 transitions, 540 flow [2022-11-16 12:05:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:05:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:05:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 533 transitions. [2022-11-16 12:05:32,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.915807560137457 [2022-11-16 12:05:32,349 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 533 transitions. [2022-11-16 12:05:32,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 533 transitions. [2022-11-16 12:05:32,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:32,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 533 transitions. [2022-11-16 12:05:32,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 266.5) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,354 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,354 INFO L175 Difference]: Start difference. First operand has 251 places, 291 transitions, 612 flow. Second operand 2 states and 533 transitions. [2022-11-16 12:05:32,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 249 transitions, 540 flow [2022-11-16 12:05:32,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 249 transitions, 540 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:32,361 INFO L231 Difference]: Finished difference. Result has 251 places, 249 transitions, 528 flow [2022-11-16 12:05:32,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=528, PETRI_PLACES=251, PETRI_TRANSITIONS=249} [2022-11-16 12:05:32,362 INFO L288 CegarLoopForPetriNet]: 251 programPoint places, 0 predicate places. [2022-11-16 12:05:32,362 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 249 transitions, 528 flow [2022-11-16 12:05:32,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:32,363 INFO L209 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] [2022-11-16 12:05:32,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:05:32,364 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash -496209431, now seen corresponding path program 1 times [2022-11-16 12:05:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:32,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060352419] [2022-11-16 12:05:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:32,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:32,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060352419] [2022-11-16 12:05:32,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060352419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:32,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:32,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:05:32,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149444625] [2022-11-16 12:05:32,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:32,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:05:32,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:05:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:05:32,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 291 [2022-11-16 12:05:32,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 249 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:32,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 291 [2022-11-16 12:05:32,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:32,562 INFO L130 PetriNetUnfolder]: 10/409 cut-off events. [2022-11-16 12:05:32,562 INFO L131 PetriNetUnfolder]: For 79/196 co-relation queries the response was YES. [2022-11-16 12:05:32,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 409 events. 10/409 cut-off events. For 79/196 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1537 event pairs, 1 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 467. Up to 30 conditions per place. [2022-11-16 12:05:32,570 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 15 selfloop transitions, 2 changer transitions 0/253 dead transitions. [2022-11-16 12:05:32,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 253 transitions, 570 flow [2022-11-16 12:05:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:05:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:05:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2022-11-16 12:05:32,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8316151202749141 [2022-11-16 12:05:32,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2022-11-16 12:05:32,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2022-11-16 12:05:32,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:32,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2022-11-16 12:05:32,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,580 INFO L175 Difference]: Start difference. First operand has 251 places, 249 transitions, 528 flow. Second operand 3 states and 726 transitions. [2022-11-16 12:05:32,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 253 transitions, 570 flow [2022-11-16 12:05:32,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 253 transitions, 570 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:32,585 INFO L231 Difference]: Finished difference. Result has 254 places, 250 transitions, 540 flow [2022-11-16 12:05:32,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=540, PETRI_PLACES=254, PETRI_TRANSITIONS=250} [2022-11-16 12:05:32,587 INFO L288 CegarLoopForPetriNet]: 251 programPoint places, 3 predicate places. [2022-11-16 12:05:32,587 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 250 transitions, 540 flow [2022-11-16 12:05:32,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:32,588 INFO L209 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] [2022-11-16 12:05:32,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:05:32,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1400735420, now seen corresponding path program 1 times [2022-11-16 12:05:32,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:32,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236048981] [2022-11-16 12:05:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:32,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:32,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:32,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236048981] [2022-11-16 12:05:32,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236048981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:32,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505831071] [2022-11-16 12:05:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:32,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:32,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:32,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:32,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:05:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:05:32,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:32,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:33,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505831071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:33,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:33,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:05:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450167419] [2022-11-16 12:05:33,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:33,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:05:33,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:05:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:33,071 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 291 [2022-11-16 12:05:33,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 250 transitions, 540 flow. Second operand has 10 states, 10 states have (on average 237.3) internal successors, (2373), 10 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:33,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:33,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 291 [2022-11-16 12:05:33,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:33,303 INFO L130 PetriNetUnfolder]: 8/367 cut-off events. [2022-11-16 12:05:33,303 INFO L131 PetriNetUnfolder]: For 53/66 co-relation queries the response was YES. [2022-11-16 12:05:33,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 367 events. 8/367 cut-off events. For 53/66 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1080 event pairs, 5 based on Foata normal form. 3/358 useless extension candidates. Maximal degree in co-relation 432. Up to 17 conditions per place. [2022-11-16 12:05:33,311 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 16 selfloop transitions, 9 changer transitions 0/260 dead transitions. [2022-11-16 12:05:33,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 260 transitions, 612 flow [2022-11-16 12:05:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:05:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2142 transitions. [2022-11-16 12:05:33,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-11-16 12:05:33,318 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2142 transitions. [2022-11-16 12:05:33,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2142 transitions. [2022-11-16 12:05:33,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:33,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2142 transitions. [2022-11-16 12:05:33,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 238.0) internal successors, (2142), 9 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:33,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:33,333 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:33,334 INFO L175 Difference]: Start difference. First operand has 254 places, 250 transitions, 540 flow. Second operand 9 states and 2142 transitions. [2022-11-16 12:05:33,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 260 transitions, 612 flow [2022-11-16 12:05:33,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 260 transitions, 610 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:05:33,340 INFO L231 Difference]: Finished difference. Result has 264 places, 256 transitions, 588 flow [2022-11-16 12:05:33,341 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=588, PETRI_PLACES=264, PETRI_TRANSITIONS=256} [2022-11-16 12:05:33,342 INFO L288 CegarLoopForPetriNet]: 251 programPoint places, 13 predicate places. [2022-11-16 12:05:33,342 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 256 transitions, 588 flow [2022-11-16 12:05:33,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 237.3) internal successors, (2373), 10 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:33,344 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:33,344 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:33,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:33,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1638456092, now seen corresponding path program 1 times [2022-11-16 12:05:33,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:33,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682419004] [2022-11-16 12:05:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:33,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:05:33,594 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:05:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:05:33,640 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:05:33,640 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:05:33,640 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:05:33,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:05:33,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:05:33,641 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:05:33,642 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:05:33,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 12:05:33,698 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:05:33,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 359 transitions, 762 flow [2022-11-16 12:05:33,869 INFO L130 PetriNetUnfolder]: 109/728 cut-off events. [2022-11-16 12:05:33,869 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 12:05:33,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 728 events. 109/728 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3179 event pairs, 6 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 514. Up to 32 conditions per place. [2022-11-16 12:05:33,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 359 transitions, 762 flow [2022-11-16 12:05:33,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 307 places, 359 transitions, 762 flow [2022-11-16 12:05:33,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:05:33,901 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;@548474db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:05:33,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:05:33,909 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-16 12:05:33,910 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:05:33,910 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:33,910 INFO L209 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] [2022-11-16 12:05:33,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1869151848, now seen corresponding path program 1 times [2022-11-16 12:05:33,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:33,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546058290] [2022-11-16 12:05:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:33,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:33,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546058290] [2022-11-16 12:05:33,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546058290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:33,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:33,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67729815] [2022-11-16 12:05:33,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:33,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:05:33,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:05:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:05:33,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 359 [2022-11-16 12:05:33,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 359 transitions, 762 flow. Second operand has 2 states, 2 states have (on average 297.5) internal successors, (595), 2 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:33,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:33,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 359 [2022-11-16 12:05:33,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:34,182 INFO L130 PetriNetUnfolder]: 25/639 cut-off events. [2022-11-16 12:05:34,183 INFO L131 PetriNetUnfolder]: For 126/150 co-relation queries the response was YES. [2022-11-16 12:05:34,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 639 events. 25/639 cut-off events. For 126/150 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2838 event pairs, 6 based on Foata normal form. 444/1053 useless extension candidates. Maximal degree in co-relation 465. Up to 37 conditions per place. [2022-11-16 12:05:34,196 INFO L137 encePairwiseOnDemand]: 306/359 looper letters, 8 selfloop transitions, 0 changer transitions 0/305 dead transitions. [2022-11-16 12:05:34,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 305 transitions, 670 flow [2022-11-16 12:05:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:05:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:05:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 655 transitions. [2022-11-16 12:05:34,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9122562674094707 [2022-11-16 12:05:34,199 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 655 transitions. [2022-11-16 12:05:34,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 655 transitions. [2022-11-16 12:05:34,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:34,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 655 transitions. [2022-11-16 12:05:34,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 327.5) internal successors, (655), 2 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,203 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,204 INFO L175 Difference]: Start difference. First operand has 307 places, 359 transitions, 762 flow. Second operand 2 states and 655 transitions. [2022-11-16 12:05:34,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 305 transitions, 670 flow [2022-11-16 12:05:34,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 305 transitions, 670 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:34,210 INFO L231 Difference]: Finished difference. Result has 307 places, 305 transitions, 654 flow [2022-11-16 12:05:34,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=654, PETRI_PLACES=307, PETRI_TRANSITIONS=305} [2022-11-16 12:05:34,212 INFO L288 CegarLoopForPetriNet]: 307 programPoint places, 0 predicate places. [2022-11-16 12:05:34,212 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 305 transitions, 654 flow [2022-11-16 12:05:34,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 297.5) internal successors, (595), 2 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:34,213 INFO L209 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] [2022-11-16 12:05:34,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:05:34,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:34,214 INFO L85 PathProgramCache]: Analyzing trace with hash -918263639, now seen corresponding path program 1 times [2022-11-16 12:05:34,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:34,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110968795] [2022-11-16 12:05:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:34,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:34,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:34,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110968795] [2022-11-16 12:05:34,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110968795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:34,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:34,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:05:34,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633567618] [2022-11-16 12:05:34,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:34,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:05:34,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:34,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:05:34,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:05:34,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 359 [2022-11-16 12:05:34,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 305 transitions, 654 flow. Second operand has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:34,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 359 [2022-11-16 12:05:34,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:34,493 INFO L130 PetriNetUnfolder]: 24/618 cut-off events. [2022-11-16 12:05:34,493 INFO L131 PetriNetUnfolder]: For 130/244 co-relation queries the response was YES. [2022-11-16 12:05:34,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 618 events. 24/618 cut-off events. For 130/244 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2775 event pairs, 6 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 728. Up to 56 conditions per place. [2022-11-16 12:05:34,509 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 17 selfloop transitions, 2 changer transitions 0/309 dead transitions. [2022-11-16 12:05:34,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 309 transitions, 700 flow [2022-11-16 12:05:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:05:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:05:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2022-11-16 12:05:34,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8263695450324977 [2022-11-16 12:05:34,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2022-11-16 12:05:34,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2022-11-16 12:05:34,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:34,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2022-11-16 12:05:34,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,523 INFO L175 Difference]: Start difference. First operand has 307 places, 305 transitions, 654 flow. Second operand 3 states and 890 transitions. [2022-11-16 12:05:34,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 309 transitions, 700 flow [2022-11-16 12:05:34,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 309 transitions, 700 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:34,532 INFO L231 Difference]: Finished difference. Result has 310 places, 306 transitions, 666 flow [2022-11-16 12:05:34,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=666, PETRI_PLACES=310, PETRI_TRANSITIONS=306} [2022-11-16 12:05:34,535 INFO L288 CegarLoopForPetriNet]: 307 programPoint places, 3 predicate places. [2022-11-16 12:05:34,535 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 306 transitions, 666 flow [2022-11-16 12:05:34,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:34,536 INFO L209 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] [2022-11-16 12:05:34,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:05:34,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1259078746, now seen corresponding path program 1 times [2022-11-16 12:05:34,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:34,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418558356] [2022-11-16 12:05:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:34,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:34,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:34,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418558356] [2022-11-16 12:05:34,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418558356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:34,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984239928] [2022-11-16 12:05:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:34,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:34,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:34,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:34,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:05:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:05:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:34,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:34,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984239928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:34,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:34,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:05:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949739626] [2022-11-16 12:05:34,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:34,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:05:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:05:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:34,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 359 [2022-11-16 12:05:34,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 306 transitions, 666 flow. Second operand has 10 states, 10 states have (on average 291.3) internal successors, (2913), 10 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:34,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 359 [2022-11-16 12:05:34,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:35,216 INFO L130 PetriNetUnfolder]: 22/576 cut-off events. [2022-11-16 12:05:35,217 INFO L131 PetriNetUnfolder]: For 115/137 co-relation queries the response was YES. [2022-11-16 12:05:35,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 576 events. 22/576 cut-off events. For 115/137 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2288 event pairs, 10 based on Foata normal form. 4/558 useless extension candidates. Maximal degree in co-relation 696. Up to 40 conditions per place. [2022-11-16 12:05:35,232 INFO L137 encePairwiseOnDemand]: 353/359 looper letters, 18 selfloop transitions, 9 changer transitions 0/316 dead transitions. [2022-11-16 12:05:35,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 316 transitions, 742 flow [2022-11-16 12:05:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:05:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2630 transitions. [2022-11-16 12:05:35,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8139894769421232 [2022-11-16 12:05:35,239 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2630 transitions. [2022-11-16 12:05:35,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2630 transitions. [2022-11-16 12:05:35,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:35,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2630 transitions. [2022-11-16 12:05:35,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 292.22222222222223) internal successors, (2630), 9 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:35,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:35,301 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:35,302 INFO L175 Difference]: Start difference. First operand has 310 places, 306 transitions, 666 flow. Second operand 9 states and 2630 transitions. [2022-11-16 12:05:35,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 316 transitions, 742 flow [2022-11-16 12:05:35,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 316 transitions, 740 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:05:35,308 INFO L231 Difference]: Finished difference. Result has 320 places, 312 transitions, 714 flow [2022-11-16 12:05:35,309 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=714, PETRI_PLACES=320, PETRI_TRANSITIONS=312} [2022-11-16 12:05:35,310 INFO L288 CegarLoopForPetriNet]: 307 programPoint places, 13 predicate places. [2022-11-16 12:05:35,310 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 312 transitions, 714 flow [2022-11-16 12:05:35,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 291.3) internal successors, (2913), 10 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:35,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:35,311 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:35,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:35,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:05:35,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:35,518 INFO L85 PathProgramCache]: Analyzing trace with hash -912045716, now seen corresponding path program 1 times [2022-11-16 12:05:35,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:35,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572854938] [2022-11-16 12:05:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:35,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:05:35,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:05:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:05:35,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:05:35,605 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:05:35,606 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:05:35,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:05:35,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:05:35,606 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:05:35,608 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:05:35,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 12:05:35,669 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-16 12:05:35,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 427 transitions, 914 flow [2022-11-16 12:05:36,002 INFO L130 PetriNetUnfolder]: 175/1102 cut-off events. [2022-11-16 12:05:36,003 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-16 12:05:36,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 1102 events. 175/1102 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5450 event pairs, 23 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 773. Up to 80 conditions per place. [2022-11-16 12:05:36,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 363 places, 427 transitions, 914 flow [2022-11-16 12:05:36,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 363 places, 427 transitions, 914 flow [2022-11-16 12:05:36,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:05:36,045 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;@548474db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:05:36,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:05:36,052 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-16 12:05:36,053 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:05:36,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:36,053 INFO L209 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] [2022-11-16 12:05:36,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash 804860456, now seen corresponding path program 1 times [2022-11-16 12:05:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890015060] [2022-11-16 12:05:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:36,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:36,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890015060] [2022-11-16 12:05:36,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890015060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:36,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:36,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:36,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125599162] [2022-11-16 12:05:36,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:36,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:05:36,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:36,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:05:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:05:36,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 427 [2022-11-16 12:05:36,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 427 transitions, 914 flow. Second operand has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:36,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:36,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 427 [2022-11-16 12:05:36,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:36,453 INFO L130 PetriNetUnfolder]: 59/980 cut-off events. [2022-11-16 12:05:36,453 INFO L131 PetriNetUnfolder]: For 295/333 co-relation queries the response was YES. [2022-11-16 12:05:36,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 980 events. 59/980 cut-off events. For 295/333 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5016 event pairs, 23 based on Foata normal form. 1070/2001 useless extension candidates. Maximal degree in co-relation 720. Up to 86 conditions per place. [2022-11-16 12:05:36,479 INFO L137 encePairwiseOnDemand]: 362/427 looper letters, 10 selfloop transitions, 0 changer transitions 0/361 dead transitions. [2022-11-16 12:05:36,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 361 transitions, 802 flow [2022-11-16 12:05:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:05:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:05:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 777 transitions. [2022-11-16 12:05:36,482 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9098360655737705 [2022-11-16 12:05:36,482 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 777 transitions. [2022-11-16 12:05:36,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 777 transitions. [2022-11-16 12:05:36,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:36,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 777 transitions. [2022-11-16 12:05:36,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 388.5) internal successors, (777), 2 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:36,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:36,488 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:36,488 INFO L175 Difference]: Start difference. First operand has 363 places, 427 transitions, 914 flow. Second operand 2 states and 777 transitions. [2022-11-16 12:05:36,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 361 transitions, 802 flow [2022-11-16 12:05:36,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 361 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:36,495 INFO L231 Difference]: Finished difference. Result has 363 places, 361 transitions, 782 flow [2022-11-16 12:05:36,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=782, PETRI_PLACES=363, PETRI_TRANSITIONS=361} [2022-11-16 12:05:36,497 INFO L288 CegarLoopForPetriNet]: 363 programPoint places, 0 predicate places. [2022-11-16 12:05:36,497 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 361 transitions, 782 flow [2022-11-16 12:05:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:36,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:36,498 INFO L209 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] [2022-11-16 12:05:36,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:05:36,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:36,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1982555031, now seen corresponding path program 1 times [2022-11-16 12:05:36,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:36,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870834589] [2022-11-16 12:05:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:36,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:36,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:36,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870834589] [2022-11-16 12:05:36,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870834589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:36,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:36,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:05:36,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461596872] [2022-11-16 12:05:36,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:36,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:05:36,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:05:36,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:05:36,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 427 [2022-11-16 12:05:36,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 361 transitions, 782 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 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) [2022-11-16 12:05:36,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:36,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 427 [2022-11-16 12:05:36,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:36,939 INFO L130 PetriNetUnfolder]: 58/959 cut-off events. [2022-11-16 12:05:36,939 INFO L131 PetriNetUnfolder]: For 324/537 co-relation queries the response was YES. [2022-11-16 12:05:36,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 959 events. 58/959 cut-off events. For 324/537 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4933 event pairs, 23 based on Foata normal form. 1/913 useless extension candidates. Maximal degree in co-relation 1178. Up to 110 conditions per place. [2022-11-16 12:05:36,975 INFO L137 encePairwiseOnDemand]: 424/427 looper letters, 19 selfloop transitions, 2 changer transitions 0/365 dead transitions. [2022-11-16 12:05:36,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 365 transitions, 832 flow [2022-11-16 12:05:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:05:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:05:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1054 transitions. [2022-11-16 12:05:36,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8227946916471507 [2022-11-16 12:05:36,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1054 transitions. [2022-11-16 12:05:36,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1054 transitions. [2022-11-16 12:05:36,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:36,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1054 transitions. [2022-11-16 12:05:36,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.3333333333333) internal successors, (1054), 3 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:36,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:36,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:36,988 INFO L175 Difference]: Start difference. First operand has 363 places, 361 transitions, 782 flow. Second operand 3 states and 1054 transitions. [2022-11-16 12:05:36,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 365 transitions, 832 flow [2022-11-16 12:05:36,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 365 transitions, 832 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:36,998 INFO L231 Difference]: Finished difference. Result has 366 places, 362 transitions, 794 flow [2022-11-16 12:05:36,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=794, PETRI_PLACES=366, PETRI_TRANSITIONS=362} [2022-11-16 12:05:37,000 INFO L288 CegarLoopForPetriNet]: 363 programPoint places, 3 predicate places. [2022-11-16 12:05:37,000 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 362 transitions, 794 flow [2022-11-16 12:05:37,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 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) [2022-11-16 12:05:37,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:37,001 INFO L209 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] [2022-11-16 12:05:37,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:05:37,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1304140408, now seen corresponding path program 1 times [2022-11-16 12:05:37,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:37,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344501534] [2022-11-16 12:05:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:37,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:37,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:37,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344501534] [2022-11-16 12:05:37,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344501534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:37,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76456658] [2022-11-16 12:05:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:37,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:37,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:37,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:05:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:05:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:37,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:37,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76456658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:37,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:37,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:05:37,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222181273] [2022-11-16 12:05:37,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:37,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:05:37,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:05:37,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:37,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 427 [2022-11-16 12:05:37,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 362 transitions, 794 flow. Second operand has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:37,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:37,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 427 [2022-11-16 12:05:37,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:37,796 INFO L130 PetriNetUnfolder]: 56/917 cut-off events. [2022-11-16 12:05:37,796 INFO L131 PetriNetUnfolder]: For 315/452 co-relation queries the response was YES. [2022-11-16 12:05:37,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 917 events. 56/917 cut-off events. For 315/452 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4447 event pairs, 27 based on Foata normal form. 5/882 useless extension candidates. Maximal degree in co-relation 1149. Up to 91 conditions per place. [2022-11-16 12:05:37,820 INFO L137 encePairwiseOnDemand]: 421/427 looper letters, 20 selfloop transitions, 9 changer transitions 0/372 dead transitions. [2022-11-16 12:05:37,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 372 transitions, 874 flow [2022-11-16 12:05:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:05:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3118 transitions. [2022-11-16 12:05:37,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8113453031485819 [2022-11-16 12:05:37,829 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3118 transitions. [2022-11-16 12:05:37,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3118 transitions. [2022-11-16 12:05:37,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:37,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3118 transitions. [2022-11-16 12:05:37,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 346.44444444444446) internal successors, (3118), 9 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:37,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 427.0) internal successors, (4270), 10 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:37,848 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 427.0) internal successors, (4270), 10 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:37,848 INFO L175 Difference]: Start difference. First operand has 366 places, 362 transitions, 794 flow. Second operand 9 states and 3118 transitions. [2022-11-16 12:05:37,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 372 transitions, 874 flow [2022-11-16 12:05:37,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 372 transitions, 872 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:05:37,855 INFO L231 Difference]: Finished difference. Result has 376 places, 368 transitions, 842 flow [2022-11-16 12:05:37,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=842, PETRI_PLACES=376, PETRI_TRANSITIONS=368} [2022-11-16 12:05:37,857 INFO L288 CegarLoopForPetriNet]: 363 programPoint places, 13 predicate places. [2022-11-16 12:05:37,857 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 368 transitions, 842 flow [2022-11-16 12:05:37,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:37,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:37,858 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:37,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:38,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb62aae6-8edd-4217-b6ef-714faa613ec4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:05:38,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1548765897, now seen corresponding path program 1 times [2022-11-16 12:05:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:38,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637167899] [2022-11-16 12:05:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:38,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:05:38,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:38,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637167899] [2022-11-16 12:05:38,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637167899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:38,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:38,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:05:38,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033834081] [2022-11-16 12:05:38,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:38,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:05:38,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:05:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:05:38,207 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 427 [2022-11-16 12:05:38,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 368 transitions, 842 flow. Second operand has 5 states, 5 states have (on average 306.6) internal successors, (1533), 5 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:38,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:38,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 427 [2022-11-16 12:05:38,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand