./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:46:41,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:46:41,383 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:46:41,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:46:41,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:46:41,411 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:46:41,414 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:46:41,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:46:41,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:46:41,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:46:41,422 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:46:41,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:46:41,423 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:46:41,425 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:46:41,426 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:46:41,426 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:46:41,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:46:41,427 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:46:41,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:46:41,428 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:46:41,428 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:46:41,429 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:46:41,430 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:46:41,430 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:46:41,430 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:46:41,431 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:46:41,432 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:46:41,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:46:41,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:46:41,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:46:41,434 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:46:41,435 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:46:41,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:46:41,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:46:41,435 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:46:41,436 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:46:41,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:46:41,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:46:41,436 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:46:41,437 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_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2023-11-06 22:46:41,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:46:41,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:46:41,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:46:41,817 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:46:41,818 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:46:41,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2023-11-06 22:46:45,020 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:46:45,313 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:46:45,314 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2023-11-06 22:46:45,325 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/data/98d6610c1/a7859235ee1e4db5b506f57c68db11bc/FLAG63abd87d8 [2023-11-06 22:46:45,346 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/data/98d6610c1/a7859235ee1e4db5b506f57c68db11bc [2023-11-06 22:46:45,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:46:45,355 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:46:45,360 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:45,361 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:46:45,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:46:45,367 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd5c63b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45, skipping insertion in model container [2023-11-06 22:46:45,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,402 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:46:45,655 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_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2023-11-06 22:46:45,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:45,672 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:46:45,702 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_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2023-11-06 22:46:45,704 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:45,712 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:46:45,713 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:46:45,721 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:46:45,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45 WrapperNode [2023-11-06 22:46:45,722 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:45,723 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:46:45,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:46:45,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:46:45,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,774 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2023-11-06 22:46:45,774 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:46:45,775 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:46:45,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:46:45,776 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:46:45,785 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,790 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,790 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,798 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,811 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:46:45,812 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:46:45,812 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:46:45,813 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:46:45,814 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (1/1) ... [2023-11-06 22:46:45,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:46:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:45,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:46:45,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:46:45,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:46:45,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:46:45,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:46:45,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:46:45,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:46:45,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:46:45,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:46:45,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:46:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:46:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:46:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:46:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:46:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:46:45,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:46:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:46:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:46:45,914 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:46:46,056 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:46:46,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:46:46,358 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:46:46,435 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:46:46,435 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:46:46,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:46 BoogieIcfgContainer [2023-11-06 22:46:46,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:46:46,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:46:46,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:46:46,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:46:46,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:45" (1/3) ... [2023-11-06 22:46:46,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4732ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:46, skipping insertion in model container [2023-11-06 22:46:46,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:45" (2/3) ... [2023-11-06 22:46:46,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4732ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:46, skipping insertion in model container [2023-11-06 22:46:46,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:46" (3/3) ... [2023-11-06 22:46:46,451 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2023-11-06 22:46:46,461 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:46:46,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:46:46,492 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:46:46,492 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:46:46,612 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:46:46,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 114 transitions, 249 flow [2023-11-06 22:46:46,728 INFO L124 PetriNetUnfolderBase]: 8/111 cut-off events. [2023-11-06 22:46:46,729 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:46:46,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 111 events. 8/111 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-11-06 22:46:46,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 114 transitions, 249 flow [2023-11-06 22:46:46,741 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 100 transitions, 218 flow [2023-11-06 22:46:46,746 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:46:46,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 100 transitions, 218 flow [2023-11-06 22:46:46,763 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 100 transitions, 218 flow [2023-11-06 22:46:46,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 100 transitions, 218 flow [2023-11-06 22:46:46,809 INFO L124 PetriNetUnfolderBase]: 8/100 cut-off events. [2023-11-06 22:46:46,809 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:46:46,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 8/100 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-11-06 22:46:46,813 INFO L119 LiptonReduction]: Number of co-enabled transitions 1010 [2023-11-06 22:46:52,236 INFO L134 LiptonReduction]: Checked pairs total: 1874 [2023-11-06 22:46:52,238 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-11-06 22:46:52,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:46:52,278 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;@573ba5a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:46:52,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:46:52,294 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:46:52,295 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-06 22:46:52,295 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:46:52,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:52,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:52,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:46:52,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash 408147411, now seen corresponding path program 1 times [2023-11-06 22:46:52,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:52,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683920911] [2023-11-06 22:46:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:53,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:53,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683920911] [2023-11-06 22:46:53,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683920911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:53,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:53,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:46:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224458683] [2023-11-06 22:46:53,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:53,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:46:53,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:46:53,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:46:53,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2023-11-06 22:46:53,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 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) [2023-11-06 22:46:53,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:53,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2023-11-06 22:46:53,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:53,838 INFO L124 PetriNetUnfolderBase]: 413/616 cut-off events. [2023-11-06 22:46:53,838 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-06 22:46:53,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1294 conditions, 616 events. 413/616 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2396 event pairs, 29 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 979. Up to 506 conditions per place. [2023-11-06 22:46:53,849 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-11-06 22:46:53,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 204 flow [2023-11-06 22:46:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:46:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:46:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 407 transitions. [2023-11-06 22:46:53,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49634146341463414 [2023-11-06 22:46:53,872 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 407 transitions. [2023-11-06 22:46:53,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 407 transitions. [2023-11-06 22:46:53,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:53,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 407 transitions. [2023-11-06 22:46:53,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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) [2023-11-06 22:46:53,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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) [2023-11-06 22:46:53,899 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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) [2023-11-06 22:46:53,901 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 4 states and 407 transitions. [2023-11-06 22:46:53,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 204 flow [2023-11-06 22:46:53,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:46:53,908 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 88 flow [2023-11-06 22:46:53,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-11-06 22:46:53,915 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-11-06 22:46:53,915 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 88 flow [2023-11-06 22:46:53,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 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) [2023-11-06 22:46:53,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:53,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:53,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:46:53,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:46:53,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1375018163, now seen corresponding path program 1 times [2023-11-06 22:46:53,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:53,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968889303] [2023-11-06 22:46:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:53,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:46:54,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968889303] [2023-11-06 22:46:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968889303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:54,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:46:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775267515] [2023-11-06 22:46:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:54,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:46:54,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:46:54,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:46:54,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-11-06 22:46:54,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 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) [2023-11-06 22:46:54,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:54,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-11-06 22:46:54,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:54,906 INFO L124 PetriNetUnfolderBase]: 498/716 cut-off events. [2023-11-06 22:46:54,907 INFO L125 PetriNetUnfolderBase]: For 144/160 co-relation queries the response was YES. [2023-11-06 22:46:54,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 716 events. 498/716 cut-off events. For 144/160 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2370 event pairs, 63 based on Foata normal form. 16/610 useless extension candidates. Maximal degree in co-relation 1483. Up to 447 conditions per place. [2023-11-06 22:46:54,918 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 41 selfloop transitions, 4 changer transitions 2/51 dead transitions. [2023-11-06 22:46:54,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 51 transitions, 249 flow [2023-11-06 22:46:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:46:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:46:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2023-11-06 22:46:54,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2023-11-06 22:46:54,923 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2023-11-06 22:46:54,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2023-11-06 22:46:54,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:54,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2023-11-06 22:46:54,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 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) [2023-11-06 22:46:54,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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) [2023-11-06 22:46:54,930 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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) [2023-11-06 22:46:54,930 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 88 flow. Second operand 4 states and 390 transitions. [2023-11-06 22:46:54,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 51 transitions, 249 flow [2023-11-06 22:46:54,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 51 transitions, 249 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:54,934 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 113 flow [2023-11-06 22:46:54,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-06 22:46:54,935 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-11-06 22:46:54,936 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 113 flow [2023-11-06 22:46:54,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 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) [2023-11-06 22:46:54,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:54,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:54,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:46:54,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:46:54,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash 510535912, now seen corresponding path program 1 times [2023-11-06 22:46:54,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:54,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221284755] [2023-11-06 22:46:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:54,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:55,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:55,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221284755] [2023-11-06 22:46:55,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221284755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:55,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:55,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:46:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592762445] [2023-11-06 22:46:55,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:55,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:46:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:46:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:46:55,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-11-06 22:46:55,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 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) [2023-11-06 22:46:55,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:55,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-11-06 22:46:55,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:55,960 INFO L124 PetriNetUnfolderBase]: 874/1344 cut-off events. [2023-11-06 22:46:55,960 INFO L125 PetriNetUnfolderBase]: For 380/454 co-relation queries the response was YES. [2023-11-06 22:46:55,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3481 conditions, 1344 events. 874/1344 cut-off events. For 380/454 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5782 event pairs, 143 based on Foata normal form. 74/1325 useless extension candidates. Maximal degree in co-relation 3019. Up to 520 conditions per place. [2023-11-06 22:46:55,979 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 65 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2023-11-06 22:46:55,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 84 transitions, 446 flow [2023-11-06 22:46:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:46:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:46:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 590 transitions. [2023-11-06 22:46:55,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2023-11-06 22:46:55,983 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 590 transitions. [2023-11-06 22:46:55,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 590 transitions. [2023-11-06 22:46:55,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:55,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 590 transitions. [2023-11-06 22:46:55,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 98.33333333333333) internal successors, (590), 6 states have internal predecessors, (590), 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) [2023-11-06 22:46:55,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 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) [2023-11-06 22:46:55,992 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 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) [2023-11-06 22:46:55,993 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 113 flow. Second operand 6 states and 590 transitions. [2023-11-06 22:46:55,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 84 transitions, 446 flow [2023-11-06 22:46:56,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 84 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:56,021 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 266 flow [2023-11-06 22:46:56,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-11-06 22:46:56,023 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-11-06 22:46:56,027 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 266 flow [2023-11-06 22:46:56,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 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) [2023-11-06 22:46:56,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:56,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:56,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:46:56,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:46:56,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:56,030 INFO L85 PathProgramCache]: Analyzing trace with hash 4965390, now seen corresponding path program 2 times [2023-11-06 22:46:56,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:56,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080862116] [2023-11-06 22:46:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:56,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:56,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:56,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080862116] [2023-11-06 22:46:56,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080862116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:56,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607474883] [2023-11-06 22:46:56,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:46:56,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:56,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:56,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:56,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:46:56,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:46:56,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:56,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:46:56,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:46:56,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:46:56,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607474883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:56,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:46:56,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-06 22:46:56,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155493342] [2023-11-06 22:46:56,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:56,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:46:56,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:56,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:46:56,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:46:56,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 205 [2023-11-06 22:46:56,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 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) [2023-11-06 22:46:56,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:56,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 205 [2023-11-06 22:46:56,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:57,051 INFO L124 PetriNetUnfolderBase]: 1174/1790 cut-off events. [2023-11-06 22:46:57,051 INFO L125 PetriNetUnfolderBase]: For 3077/3183 co-relation queries the response was YES. [2023-11-06 22:46:57,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6322 conditions, 1790 events. 1174/1790 cut-off events. For 3077/3183 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 8192 event pairs, 261 based on Foata normal form. 128/1911 useless extension candidates. Maximal degree in co-relation 5365. Up to 1273 conditions per place. [2023-11-06 22:46:57,083 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 60 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-11-06 22:46:57,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 532 flow [2023-11-06 22:46:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:46:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:46:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 514 transitions. [2023-11-06 22:46:57,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014634146341463 [2023-11-06 22:46:57,087 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 514 transitions. [2023-11-06 22:46:57,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 514 transitions. [2023-11-06 22:46:57,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:57,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 514 transitions. [2023-11-06 22:46:57,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 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) [2023-11-06 22:46:57,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 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) [2023-11-06 22:46:57,096 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 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) [2023-11-06 22:46:57,096 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 266 flow. Second operand 5 states and 514 transitions. [2023-11-06 22:46:57,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 532 flow [2023-11-06 22:46:57,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 75 transitions, 528 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:57,118 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 317 flow [2023-11-06 22:46:57,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-11-06 22:46:57,121 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2023-11-06 22:46:57,122 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 317 flow [2023-11-06 22:46:57,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 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) [2023-11-06 22:46:57,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:57,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:57,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:57,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:57,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:46:57,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:57,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1395160744, now seen corresponding path program 3 times [2023-11-06 22:46:57,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:57,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575425048] [2023-11-06 22:46:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:57,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:57,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:57,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575425048] [2023-11-06 22:46:57,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575425048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:57,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995690579] [2023-11-06 22:46:57,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:46:57,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:57,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:57,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:46:57,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:46:57,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:57,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:46:57,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:58,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:58,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995690579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:58,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:58,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2023-11-06 22:46:58,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079733073] [2023-11-06 22:46:58,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:58,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:46:58,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:46:58,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:46:58,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-11-06 22:46:58,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 317 flow. Second operand has 9 states, 9 states have (on average 92.66666666666667) internal successors, (834), 9 states have internal predecessors, (834), 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) [2023-11-06 22:46:58,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:58,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-11-06 22:46:58,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:59,081 INFO L124 PetriNetUnfolderBase]: 1691/2486 cut-off events. [2023-11-06 22:46:59,081 INFO L125 PetriNetUnfolderBase]: For 4949/4999 co-relation queries the response was YES. [2023-11-06 22:46:59,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8856 conditions, 2486 events. 1691/2486 cut-off events. For 4949/4999 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 11329 event pairs, 155 based on Foata normal form. 176/2641 useless extension candidates. Maximal degree in co-relation 3820. Up to 803 conditions per place. [2023-11-06 22:46:59,150 INFO L140 encePairwiseOnDemand]: 196/205 looper letters, 79 selfloop transitions, 32 changer transitions 0/120 dead transitions. [2023-11-06 22:46:59,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 120 transitions, 965 flow [2023-11-06 22:46:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:46:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:46:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 956 transitions. [2023-11-06 22:46:59,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634146341463417 [2023-11-06 22:46:59,158 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 956 transitions. [2023-11-06 22:46:59,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 956 transitions. [2023-11-06 22:46:59,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:59,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 956 transitions. [2023-11-06 22:46:59,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 95.6) internal successors, (956), 10 states have internal predecessors, (956), 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) [2023-11-06 22:46:59,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 205.0) internal successors, (2255), 11 states have internal predecessors, (2255), 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) [2023-11-06 22:46:59,173 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 205.0) internal successors, (2255), 11 states have internal predecessors, (2255), 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) [2023-11-06 22:46:59,173 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 317 flow. Second operand 10 states and 956 transitions. [2023-11-06 22:46:59,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 120 transitions, 965 flow [2023-11-06 22:46:59,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 120 transitions, 942 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:46:59,193 INFO L231 Difference]: Finished difference. Result has 60 places, 72 transitions, 567 flow [2023-11-06 22:46:59,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=567, PETRI_PLACES=60, PETRI_TRANSITIONS=72} [2023-11-06 22:46:59,194 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 28 predicate places. [2023-11-06 22:46:59,195 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 72 transitions, 567 flow [2023-11-06 22:46:59,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 92.66666666666667) internal successors, (834), 9 states have internal predecessors, (834), 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) [2023-11-06 22:46:59,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:59,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:59,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:59,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:59,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:46:59,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:59,413 INFO L85 PathProgramCache]: Analyzing trace with hash 349650214, now seen corresponding path program 4 times [2023-11-06 22:46:59,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:59,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767157942] [2023-11-06 22:46:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:59,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:59,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:59,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767157942] [2023-11-06 22:46:59,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767157942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:59,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231106118] [2023-11-06 22:46:59,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:46:59,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:59,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:59,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:59,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:46:59,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:46:59,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:59,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:46:59,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:00,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:00,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231106118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:00,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:47:00,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-11-06 22:47:00,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214447763] [2023-11-06 22:47:00,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:00,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:47:00,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:47:00,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:47:00,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-06 22:47:00,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 72 transitions, 567 flow. Second operand has 12 states, 12 states have (on average 85.83333333333333) internal successors, (1030), 12 states have internal predecessors, (1030), 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) [2023-11-06 22:47:00,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:00,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-06 22:47:00,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:02,037 INFO L124 PetriNetUnfolderBase]: 3475/5169 cut-off events. [2023-11-06 22:47:02,038 INFO L125 PetriNetUnfolderBase]: For 18652/18834 co-relation queries the response was YES. [2023-11-06 22:47:02,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23025 conditions, 5169 events. 3475/5169 cut-off events. For 18652/18834 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 27771 event pairs, 110 based on Foata normal form. 288/5425 useless extension candidates. Maximal degree in co-relation 11728. Up to 1686 conditions per place. [2023-11-06 22:47:02,118 INFO L140 encePairwiseOnDemand]: 195/205 looper letters, 185 selfloop transitions, 88 changer transitions 0/282 dead transitions. [2023-11-06 22:47:02,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 282 transitions, 2731 flow [2023-11-06 22:47:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:47:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:47:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1364 transitions. [2023-11-06 22:47:02,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44357723577235775 [2023-11-06 22:47:02,127 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1364 transitions. [2023-11-06 22:47:02,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1364 transitions. [2023-11-06 22:47:02,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:02,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1364 transitions. [2023-11-06 22:47:02,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 90.93333333333334) internal successors, (1364), 15 states have internal predecessors, (1364), 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) [2023-11-06 22:47:02,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 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) [2023-11-06 22:47:02,145 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 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) [2023-11-06 22:47:02,145 INFO L175 Difference]: Start difference. First operand has 60 places, 72 transitions, 567 flow. Second operand 15 states and 1364 transitions. [2023-11-06 22:47:02,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 282 transitions, 2731 flow [2023-11-06 22:47:02,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 282 transitions, 2678 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-11-06 22:47:02,267 INFO L231 Difference]: Finished difference. Result has 83 places, 165 transitions, 1675 flow [2023-11-06 22:47:02,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1675, PETRI_PLACES=83, PETRI_TRANSITIONS=165} [2023-11-06 22:47:02,269 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 51 predicate places. [2023-11-06 22:47:02,270 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 165 transitions, 1675 flow [2023-11-06 22:47:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 85.83333333333333) internal successors, (1030), 12 states have internal predecessors, (1030), 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) [2023-11-06 22:47:02,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:02,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:02,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:02,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:02,479 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:47:02,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash 494191461, now seen corresponding path program 1 times [2023-11-06 22:47:02,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:02,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722913077] [2023-11-06 22:47:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:06,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:06,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722913077] [2023-11-06 22:47:06,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722913077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:47:06,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420228385] [2023-11-06 22:47:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:06,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:06,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:06,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:06,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:47:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:07,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:47:07,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:08,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:10,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420228385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:10,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:47:10,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-11-06 22:47:10,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219866430] [2023-11-06 22:47:10,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:10,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:47:10,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:10,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:47:10,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:47:12,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 205 [2023-11-06 22:47:12,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 165 transitions, 1675 flow. Second operand has 24 states, 24 states have (on average 80.75) internal successors, (1938), 24 states have internal predecessors, (1938), 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) [2023-11-06 22:47:12,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:12,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 205 [2023-11-06 22:47:12,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:52,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:48:07,247 INFO L124 PetriNetUnfolderBase]: 19353/28348 cut-off events. [2023-11-06 22:48:07,247 INFO L125 PetriNetUnfolderBase]: For 120177/120363 co-relation queries the response was YES. [2023-11-06 22:48:07,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142279 conditions, 28348 events. 19353/28348 cut-off events. For 120177/120363 co-relation queries the response was YES. Maximal size of possible extension queue 1573. Compared 185428 event pairs, 530 based on Foata normal form. 211/28556 useless extension candidates. Maximal degree in co-relation 125546. Up to 7699 conditions per place. [2023-11-06 22:48:07,621 INFO L140 encePairwiseOnDemand]: 193/205 looper letters, 608 selfloop transitions, 877 changer transitions 307/1796 dead transitions. [2023-11-06 22:48:07,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 1796 transitions, 18971 flow [2023-11-06 22:48:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-06 22:48:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-11-06 22:48:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 7907 transitions. [2023-11-06 22:48:07,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238541945859019 [2023-11-06 22:48:07,662 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 7907 transitions. [2023-11-06 22:48:07,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 7907 transitions. [2023-11-06 22:48:07,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:07,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 7907 transitions. [2023-11-06 22:48:07,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 86.89010989010988) internal successors, (7907), 91 states have internal predecessors, (7907), 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) [2023-11-06 22:48:07,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 205.0) internal successors, (18860), 92 states have internal predecessors, (18860), 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) [2023-11-06 22:48:07,751 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 205.0) internal successors, (18860), 92 states have internal predecessors, (18860), 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) [2023-11-06 22:48:07,752 INFO L175 Difference]: Start difference. First operand has 83 places, 165 transitions, 1675 flow. Second operand 91 states and 7907 transitions. [2023-11-06 22:48:07,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 1796 transitions, 18971 flow [2023-11-06 22:48:08,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 1796 transitions, 18809 flow, removed 81 selfloop flow, removed 0 redundant places. [2023-11-06 22:48:08,591 INFO L231 Difference]: Finished difference. Result has 221 places, 1057 transitions, 13273 flow [2023-11-06 22:48:08,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=13273, PETRI_PLACES=221, PETRI_TRANSITIONS=1057} [2023-11-06 22:48:08,695 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 189 predicate places. [2023-11-06 22:48:08,695 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 1057 transitions, 13273 flow [2023-11-06 22:48:08,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 80.75) internal successors, (1938), 24 states have internal predecessors, (1938), 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) [2023-11-06 22:48:08,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:08,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:08,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:08,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:08,897 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:48:08,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:08,898 INFO L85 PathProgramCache]: Analyzing trace with hash 58192789, now seen corresponding path program 2 times [2023-11-06 22:48:08,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:08,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811630065] [2023-11-06 22:48:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:08,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:09,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:09,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811630065] [2023-11-06 22:48:09,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811630065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:09,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:09,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:48:09,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106833207] [2023-11-06 22:48:09,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:09,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:48:09,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:09,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:48:09,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:48:09,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-11-06 22:48:09,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 1057 transitions, 13273 flow. Second operand has 6 states, 6 states have (on average 91.5) internal successors, (549), 6 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) [2023-11-06 22:48:09,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:09,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-11-06 22:48:09,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:18,260 INFO L124 PetriNetUnfolderBase]: 17040/24970 cut-off events. [2023-11-06 22:48:18,261 INFO L125 PetriNetUnfolderBase]: For 451698/452250 co-relation queries the response was YES. [2023-11-06 22:48:18,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164228 conditions, 24970 events. 17040/24970 cut-off events. For 451698/452250 co-relation queries the response was YES. Maximal size of possible extension queue 1565. Compared 163288 event pairs, 650 based on Foata normal form. 818/25699 useless extension candidates. Maximal degree in co-relation 163861. Up to 10938 conditions per place. [2023-11-06 22:48:18,729 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 828 selfloop transitions, 545 changer transitions 0/1532 dead transitions. [2023-11-06 22:48:18,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1532 transitions, 21663 flow [2023-11-06 22:48:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:48:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:48:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 968 transitions. [2023-11-06 22:48:18,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721951219512195 [2023-11-06 22:48:18,732 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 968 transitions. [2023-11-06 22:48:18,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 968 transitions. [2023-11-06 22:48:18,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:18,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 968 transitions. [2023-11-06 22:48:18,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 96.8) internal successors, (968), 10 states have internal predecessors, (968), 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) [2023-11-06 22:48:18,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 205.0) internal successors, (2255), 11 states have internal predecessors, (2255), 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) [2023-11-06 22:48:18,740 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 205.0) internal successors, (2255), 11 states have internal predecessors, (2255), 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) [2023-11-06 22:48:18,740 INFO L175 Difference]: Start difference. First operand has 221 places, 1057 transitions, 13273 flow. Second operand 10 states and 968 transitions. [2023-11-06 22:48:18,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1532 transitions, 21663 flow [2023-11-06 22:48:30,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 1532 transitions, 20419 flow, removed 524 selfloop flow, removed 21 redundant places. [2023-11-06 22:48:30,071 INFO L231 Difference]: Finished difference. Result has 191 places, 1212 transitions, 16259 flow [2023-11-06 22:48:30,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=11988, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16259, PETRI_PLACES=191, PETRI_TRANSITIONS=1212} [2023-11-06 22:48:30,073 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 159 predicate places. [2023-11-06 22:48:30,073 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 1212 transitions, 16259 flow [2023-11-06 22:48:30,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 91.5) internal successors, (549), 6 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) [2023-11-06 22:48:30,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:30,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:30,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:48:30,074 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:48:30,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:30,075 INFO L85 PathProgramCache]: Analyzing trace with hash -378013995, now seen corresponding path program 3 times [2023-11-06 22:48:30,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:30,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491307362] [2023-11-06 22:48:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:30,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:32,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:32,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491307362] [2023-11-06 22:48:32,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491307362] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:32,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202092478] [2023-11-06 22:48:32,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:32,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:32,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:32,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:32,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:48:32,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:48:32,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:32,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:48:32,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:34,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:35,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202092478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:35,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:35,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-11-06 22:48:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675952672] [2023-11-06 22:48:35,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:35,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:48:35,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:48:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:48:37,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 205 [2023-11-06 22:48:37,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 1212 transitions, 16259 flow. Second operand has 28 states, 28 states have (on average 75.46428571428571) internal successors, (2113), 28 states have internal predecessors, (2113), 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) [2023-11-06 22:48:37,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:37,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 205 [2023-11-06 22:48:37,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:24,415 INFO L124 PetriNetUnfolderBase]: 37541/54928 cut-off events. [2023-11-06 22:49:24,415 INFO L125 PetriNetUnfolderBase]: For 750749/750749 co-relation queries the response was YES. [2023-11-06 22:49:24,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371586 conditions, 54928 events. 37541/54928 cut-off events. For 750749/750749 co-relation queries the response was YES. Maximal size of possible extension queue 3148. Compared 393797 event pairs, 298 based on Foata normal form. 114/55042 useless extension candidates. Maximal degree in co-relation 355736. Up to 14817 conditions per place. [2023-11-06 22:49:25,261 INFO L140 encePairwiseOnDemand]: 191/205 looper letters, 1010 selfloop transitions, 2603 changer transitions 488/4101 dead transitions. [2023-11-06 22:49:25,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 4101 transitions, 60599 flow [2023-11-06 22:49:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-11-06 22:49:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2023-11-06 22:49:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 9535 transitions. [2023-11-06 22:49:25,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975401292474463 [2023-11-06 22:49:25,295 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 9535 transitions. [2023-11-06 22:49:25,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 9535 transitions. [2023-11-06 22:49:25,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:25,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 9535 transitions. [2023-11-06 22:49:25,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 81.4957264957265) internal successors, (9535), 117 states have internal predecessors, (9535), 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) [2023-11-06 22:49:25,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 205.0) internal successors, (24190), 118 states have internal predecessors, (24190), 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) [2023-11-06 22:49:25,372 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 205.0) internal successors, (24190), 118 states have internal predecessors, (24190), 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) [2023-11-06 22:49:25,372 INFO L175 Difference]: Start difference. First operand has 191 places, 1212 transitions, 16259 flow. Second operand 117 states and 9535 transitions. [2023-11-06 22:49:25,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 4101 transitions, 60599 flow [2023-11-06 22:49:58,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 4101 transitions, 57649 flow, removed 1064 selfloop flow, removed 9 redundant places. [2023-11-06 22:49:58,678 INFO L231 Difference]: Finished difference. Result has 372 places, 3086 transitions, 49565 flow [2023-11-06 22:49:58,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=15488, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=953, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=49565, PETRI_PLACES=372, PETRI_TRANSITIONS=3086} [2023-11-06 22:49:58,680 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 340 predicate places. [2023-11-06 22:49:58,680 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 3086 transitions, 49565 flow [2023-11-06 22:49:58,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 75.46428571428571) internal successors, (2113), 28 states have internal predecessors, (2113), 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) [2023-11-06 22:49:58,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:58,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:58,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:58,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:58,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:49:58,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1178256733, now seen corresponding path program 4 times [2023-11-06 22:49:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:58,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045180816] [2023-11-06 22:49:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:50:02,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:02,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045180816] [2023-11-06 22:50:02,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045180816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:02,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011665985] [2023-11-06 22:50:02,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:50:02,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:02,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:02,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:02,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca66a742-bfbf-4f36-aa26-9f6c9cf89aad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:50:02,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:50:02,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:02,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:50:02,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:50:03,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:50:04,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011665985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:04,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:50:04,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-11-06 22:50:04,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545541231] [2023-11-06 22:50:04,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:04,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:50:04,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:04,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:50:04,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:50:06,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 205 [2023-11-06 22:50:06,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 3086 transitions, 49565 flow. Second operand has 25 states, 25 states have (on average 78.76) internal successors, (1969), 25 states have internal predecessors, (1969), 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) [2023-11-06 22:50:06,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:06,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 205 [2023-11-06 22:50:06,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:18,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []