./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:47:40,324 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:47:40,389 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:47:40,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:47:40,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:47:40,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:47:40,421 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:47:40,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:47:40,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:47:40,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:47:40,424 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:47:40,425 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:47:40,426 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:47:40,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:47:40,427 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:47:40,428 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:47:40,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:47:40,429 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:47:40,429 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:47:40,430 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:47:40,430 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:47:40,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:47:40,432 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:47:40,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:47:40,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:47:40,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:47:40,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:47:40,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:47:40,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:40,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:47:40,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:47:40,436 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:47:40,436 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:47:40,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:47:40,437 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:47:40,437 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:47:40,437 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:47:40,438 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:47:40,438 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:47:40,438 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 [2023-11-19 07:47:40,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:47:40,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:47:40,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:47:40,762 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:47:40,763 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:47:40,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2023-11-19 07:47:43,987 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:47:44,351 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:47:44,352 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2023-11-19 07:47:44,372 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/data/6b55cbea3/fb2474c29194451592e30b4fff732c85/FLAG63a19e759 [2023-11-19 07:47:44,398 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/data/6b55cbea3/fb2474c29194451592e30b4fff732c85 [2023-11-19 07:47:44,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:47:44,409 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:47:44,412 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:44,413 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:47:44,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:47:44,423 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:44" (1/1) ... [2023-11-19 07:47:44,424 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b1d8385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:44, skipping insertion in model container [2023-11-19 07:47:44,424 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:44" (1/1) ... [2023-11-19 07:47:44,505 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:47:45,041 WARN L240 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_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2023-11-19 07:47:45,060 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:47:45,060 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:47:45,061 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:47:45,063 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:47:45,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:45,134 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:47:45,176 WARN L240 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_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2023-11-19 07:47:45,179 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:47:45,179 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:47:45,180 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:47:45,180 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:47:45,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:45,329 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:47:45,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45 WrapperNode [2023-11-19 07:47:45,330 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:45,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:45,331 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:47:45,331 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:47:45,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,360 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,400 INFO L138 Inliner]: procedures = 278, calls = 51, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 228 [2023-11-19 07:47:45,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:45,410 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:47:45,410 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:47:45,410 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:47:45,421 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,438 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,450 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,471 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,491 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,493 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,499 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:47:45,500 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:47:45,500 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:47:45,500 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:47:45,501 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (1/1) ... [2023-11-19 07:47:45,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:45,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:45,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:47:45,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:47:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:47:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:47:45,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:47:45,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:47:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:47:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:47:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:47:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:47:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:47:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:47:45,592 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:47:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:47:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:47:45,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:47:45,594 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:47:45,761 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:47:45,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:47:46,252 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:47:46,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:47:46,265 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-19 07:47:46,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:46 BoogieIcfgContainer [2023-11-19 07:47:46,271 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:47:46,274 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:47:46,276 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:47:46,279 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:47:46,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:44" (1/3) ... [2023-11-19 07:47:46,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4965c3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:46, skipping insertion in model container [2023-11-19 07:47:46,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:45" (2/3) ... [2023-11-19 07:47:46,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4965c3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:46, skipping insertion in model container [2023-11-19 07:47:46,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:46" (3/3) ... [2023-11-19 07:47:46,283 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2023-11-19 07:47:46,293 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:47:46,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:47:46,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:47:46,303 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:47:46,392 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:47:46,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 257 transitions, 521 flow [2023-11-19 07:47:46,600 INFO L124 PetriNetUnfolderBase]: 28/276 cut-off events. [2023-11-19 07:47:46,600 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:47:46,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 276 events. 28/276 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 437 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 154. Up to 4 conditions per place. [2023-11-19 07:47:46,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 257 transitions, 521 flow [2023-11-19 07:47:46,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 252 transitions, 508 flow [2023-11-19 07:47:46,651 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:47:46,661 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 252 transitions, 508 flow [2023-11-19 07:47:46,664 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 252 transitions, 508 flow [2023-11-19 07:47:46,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 252 transitions, 508 flow [2023-11-19 07:47:46,760 INFO L124 PetriNetUnfolderBase]: 27/271 cut-off events. [2023-11-19 07:47:46,761 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:47:46,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 271 events. 27/271 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 382 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 154. Up to 4 conditions per place. [2023-11-19 07:47:46,770 INFO L119 LiptonReduction]: Number of co-enabled transitions 4550 [2023-11-19 07:48:05,664 WARN L293 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-19 07:48:17,875 WARN L293 SmtUtils]: Spent 9.19s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-19 07:48:22,005 INFO L134 LiptonReduction]: Checked pairs total: 4495 [2023-11-19 07:48:22,006 INFO L136 LiptonReduction]: Total number of compositions: 256 [2023-11-19 07:48:22,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:48:22,027 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=LoopHeads, 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;@634fe27e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:48:22,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:48:22,033 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:48:22,034 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-19 07:48:22,034 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:22,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:22,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-19 07:48:22,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:22,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:22,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1590443616, now seen corresponding path program 1 times [2023-11-19 07:48:22,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:22,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660683435] [2023-11-19 07:48:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:22,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:48:22,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:22,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660683435] [2023-11-19 07:48:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660683435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:22,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:22,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:22,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011831953] [2023-11-19 07:48:22,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:22,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:22,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:22,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:22,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 513 [2023-11-19 07:48:22,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:22,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:22,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 513 [2023-11-19 07:48:22,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:22,742 INFO L124 PetriNetUnfolderBase]: 48/112 cut-off events. [2023-11-19 07:48:22,743 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:22,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 112 events. 48/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 274 event pairs, 33 based on Foata normal form. 8/92 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-11-19 07:48:22,745 INFO L140 encePairwiseOnDemand]: 500/513 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-11-19 07:48:22,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 112 flow [2023-11-19 07:48:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2023-11-19 07:48:22,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2023-11-19 07:48:22,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2023-11-19 07:48:22,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2023-11-19 07:48:22,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:22,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2023-11-19 07:48:22,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:22,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:22,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:22,794 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 76 flow. Second operand 3 states and 720 transitions. [2023-11-19 07:48:22,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 112 flow [2023-11-19 07:48:22,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:48:22,800 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 68 flow [2023-11-19 07:48:22,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-19 07:48:22,807 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-19 07:48:22,807 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 68 flow [2023-11-19 07:48:22,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:22,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:22,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:22,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:48:22,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:22,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:22,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1171739781, now seen corresponding path program 1 times [2023-11-19 07:48:22,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:22,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807637548] [2023-11-19 07:48:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:22,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:48:22,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:22,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807637548] [2023-11-19 07:48:22,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807637548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:22,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:22,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:22,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529426707] [2023-11-19 07:48:22,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:22,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:22,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:22,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:22,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:22,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 513 [2023-11-19 07:48:22,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:22,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:22,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 513 [2023-11-19 07:48:22,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:23,222 INFO L124 PetriNetUnfolderBase]: 48/114 cut-off events. [2023-11-19 07:48:23,223 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:23,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 114 events. 48/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 275 event pairs, 33 based on Foata normal form. 2/91 useless extension candidates. Maximal degree in co-relation 209. Up to 100 conditions per place. [2023-11-19 07:48:23,224 INFO L140 encePairwiseOnDemand]: 510/513 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-19 07:48:23,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 118 flow [2023-11-19 07:48:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-11-19 07:48:23,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600389863547758 [2023-11-19 07:48:23,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-11-19 07:48:23,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-11-19 07:48:23,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:23,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-11-19 07:48:23,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,239 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 68 flow. Second operand 3 states and 708 transitions. [2023-11-19 07:48:23,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 118 flow [2023-11-19 07:48:23,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:23,241 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 80 flow [2023-11-19 07:48:23,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-11-19 07:48:23,242 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-11-19 07:48:23,242 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 80 flow [2023-11-19 07:48:23,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:23,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:23,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:48:23,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:23,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash -77969833, now seen corresponding path program 1 times [2023-11-19 07:48:23,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:23,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447232327] [2023-11-19 07:48:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:23,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:23,288 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:23,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442144197] [2023-11-19 07:48:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:23,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:23,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:23,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:23,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:48:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:23,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:48:23,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:48:23,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:48:23,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447232327] [2023-11-19 07:48:23,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:23,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442144197] [2023-11-19 07:48:23,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442144197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:23,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:23,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-19 07:48:23,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824230647] [2023-11-19 07:48:23,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:23,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:48:23,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:23,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:48:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:48:23,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 513 [2023-11-19 07:48:23,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 228.83333333333334) internal successors, (1373), 6 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:23,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 513 [2023-11-19 07:48:23,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:24,147 INFO L124 PetriNetUnfolderBase]: 48/120 cut-off events. [2023-11-19 07:48:24,147 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:48:24,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 120 events. 48/120 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 33 based on Foata normal form. 6/101 useless extension candidates. Maximal degree in co-relation 216. Up to 100 conditions per place. [2023-11-19 07:48:24,149 INFO L140 encePairwiseOnDemand]: 510/513 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-11-19 07:48:24,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 146 flow [2023-11-19 07:48:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:48:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:48:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1391 transitions. [2023-11-19 07:48:24,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45191682910981157 [2023-11-19 07:48:24,156 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1391 transitions. [2023-11-19 07:48:24,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1391 transitions. [2023-11-19 07:48:24,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:24,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1391 transitions. [2023-11-19 07:48:24,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.83333333333334) internal successors, (1391), 6 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:24,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 513.0) internal successors, (3591), 7 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:24,174 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 513.0) internal successors, (3591), 7 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:24,174 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 80 flow. Second operand 6 states and 1391 transitions. [2023-11-19 07:48:24,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 146 flow [2023-11-19 07:48:24,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:24,177 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 118 flow [2023-11-19 07:48:24,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-19 07:48:24,178 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-11-19 07:48:24,178 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 118 flow [2023-11-19 07:48:24,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 228.83333333333334) internal successors, (1373), 6 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:24,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:24,181 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:24,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:48:24,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:24,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:24,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1193706107, now seen corresponding path program 2 times [2023-11-19 07:48:24,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:24,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556087093] [2023-11-19 07:48:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:24,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:24,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892160032] [2023-11-19 07:48:24,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:48:24,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:24,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:24,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:48:24,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:48:24,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:48:24,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:48:24,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:48:24,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:48:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:25,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556087093] [2023-11-19 07:48:25,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:25,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892160032] [2023-11-19 07:48:25,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892160032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:25,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:25,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:48:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110722207] [2023-11-19 07:48:25,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:25,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:48:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:48:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:48:25,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 513 [2023-11-19 07:48:25,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 118 flow. Second operand has 12 states, 12 states have (on average 228.41666666666666) internal successors, (2741), 12 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:25,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:25,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 513 [2023-11-19 07:48:25,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:26,472 INFO L124 PetriNetUnfolderBase]: 48/132 cut-off events. [2023-11-19 07:48:26,473 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-19 07:48:26,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 132 events. 48/132 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 332 event pairs, 33 based on Foata normal form. 12/119 useless extension candidates. Maximal degree in co-relation 212. Up to 100 conditions per place. [2023-11-19 07:48:26,475 INFO L140 encePairwiseOnDemand]: 510/513 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2023-11-19 07:48:26,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 220 flow [2023-11-19 07:48:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:48:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:48:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2762 transitions. [2023-11-19 07:48:26,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44866796621182586 [2023-11-19 07:48:26,488 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2762 transitions. [2023-11-19 07:48:26,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2762 transitions. [2023-11-19 07:48:26,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:26,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2762 transitions. [2023-11-19 07:48:26,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.16666666666666) internal successors, (2762), 12 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:26,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 513.0) internal successors, (6669), 13 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:26,519 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 513.0) internal successors, (6669), 13 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:26,520 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 118 flow. Second operand 12 states and 2762 transitions. [2023-11-19 07:48:26,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 220 flow [2023-11-19 07:48:26,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 206 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:26,524 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 200 flow [2023-11-19 07:48:26,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-11-19 07:48:26,525 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-11-19 07:48:26,526 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 200 flow [2023-11-19 07:48:26,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 228.41666666666666) internal successors, (2741), 12 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:26,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:26,528 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:26,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:48:26,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 07:48:26,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:26,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:26,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1673480965, now seen corresponding path program 3 times [2023-11-19 07:48:26,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:26,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227590945] [2023-11-19 07:48:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:26,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:26,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:26,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533756555] [2023-11-19 07:48:26,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:48:26,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:26,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:26,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:26,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:48:27,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:48:27,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:48:27,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:48:27,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-19 07:48:27,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-19 07:48:27,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:27,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227590945] [2023-11-19 07:48:27,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:27,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533756555] [2023-11-19 07:48:27,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533756555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:27,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:27,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-19 07:48:27,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288030407] [2023-11-19 07:48:27,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:27,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:48:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:48:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:48:27,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 513 [2023-11-19 07:48:27,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 229.16666666666666) internal successors, (1375), 6 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:27,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 513 [2023-11-19 07:48:27,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:27,865 INFO L124 PetriNetUnfolderBase]: 50/159 cut-off events. [2023-11-19 07:48:27,865 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-19 07:48:27,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 159 events. 50/159 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 275 event pairs, 33 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 310. Up to 94 conditions per place. [2023-11-19 07:48:27,868 INFO L140 encePairwiseOnDemand]: 509/513 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-19 07:48:27,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 693 flow [2023-11-19 07:48:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:48:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:48:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1397 transitions. [2023-11-19 07:48:27,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453866146848603 [2023-11-19 07:48:27,875 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1397 transitions. [2023-11-19 07:48:27,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1397 transitions. [2023-11-19 07:48:27,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:27,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1397 transitions. [2023-11-19 07:48:27,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.83333333333334) internal successors, (1397), 6 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 513.0) internal successors, (3591), 7 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,888 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 513.0) internal successors, (3591), 7 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,889 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 200 flow. Second operand 6 states and 1397 transitions. [2023-11-19 07:48:27,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 693 flow [2023-11-19 07:48:27,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 499 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-11-19 07:48:27,900 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 235 flow [2023-11-19 07:48:27,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-11-19 07:48:27,903 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-11-19 07:48:27,904 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 235 flow [2023-11-19 07:48:27,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.16666666666666) internal successors, (1375), 6 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:27,905 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-19 07:48:27,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:28,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:28,106 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:28,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1573434828, now seen corresponding path program 4 times [2023-11-19 07:48:28,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:28,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273901411] [2023-11-19 07:48:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:28,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:28,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:28,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509849899] [2023-11-19 07:48:28,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:48:28,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:28,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:28,872 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:28,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:48:30,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:48:30,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:48:30,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 3655 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:48:30,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-19 07:48:30,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-19 07:48:31,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:31,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273901411] [2023-11-19 07:48:31,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:31,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509849899] [2023-11-19 07:48:31,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509849899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:31,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:31,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-19 07:48:31,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133759930] [2023-11-19 07:48:31,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:31,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:48:31,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:48:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:48:31,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 513 [2023-11-19 07:48:31,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 235 flow. Second operand has 24 states, 24 states have (on average 228.33333333333334) internal successors, (5480), 24 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:31,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:31,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 513 [2023-11-19 07:48:31,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:34,105 INFO L124 PetriNetUnfolderBase]: 50/207 cut-off events. [2023-11-19 07:48:34,107 INFO L125 PetriNetUnfolderBase]: For 3489/3489 co-relation queries the response was YES. [2023-11-19 07:48:34,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 207 events. 50/207 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 275 event pairs, 33 based on Foata normal form. 48/230 useless extension candidates. Maximal degree in co-relation 423. Up to 106 conditions per place. [2023-11-19 07:48:34,109 INFO L140 encePairwiseOnDemand]: 510/513 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2023-11-19 07:48:34,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 403 flow [2023-11-19 07:48:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:48:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:48:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5504 transitions. [2023-11-19 07:48:34,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447043534762833 [2023-11-19 07:48:34,139 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5504 transitions. [2023-11-19 07:48:34,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5504 transitions. [2023-11-19 07:48:34,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:34,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5504 transitions. [2023-11-19 07:48:34,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 229.33333333333334) internal successors, (5504), 24 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:34,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 513.0) internal successors, (12825), 25 states have internal predecessors, (12825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:34,196 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 513.0) internal successors, (12825), 25 states have internal predecessors, (12825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:34,204 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 235 flow. Second operand 24 states and 5504 transitions. [2023-11-19 07:48:34,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 403 flow [2023-11-19 07:48:34,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 395 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:34,211 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 469 flow [2023-11-19 07:48:34,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=469, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-11-19 07:48:34,212 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-11-19 07:48:34,213 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 469 flow [2023-11-19 07:48:34,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 228.33333333333334) internal successors, (5480), 24 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:34,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:34,218 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-19 07:48:34,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:48:34,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:34,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash 730785484, now seen corresponding path program 5 times [2023-11-19 07:48:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:34,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379078153] [2023-11-19 07:48:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:34,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:35,944 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:35,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136994007] [2023-11-19 07:48:35,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:48:35,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:35,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:35,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c4f6e6-7f2b-447b-b3d4-2725b9f52932/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process