./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/lamport.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/lamport.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c35b909c90b92e30d40b0275e3d226db26dbebaf39dc73a31d7e72eee871d214 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:41:08,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:41:08,075 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:41:08,084 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:41:08,085 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:41:08,132 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:41:08,133 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:41:08,134 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:41:08,135 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:41:08,136 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:41:08,136 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:41:08,137 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:41:08,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:41:08,138 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:41:08,139 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:41:08,140 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:41:08,140 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:41:08,141 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:41:08,141 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:41:08,142 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:41:08,142 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:41:08,143 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:41:08,144 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:41:08,144 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:41:08,145 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:41:08,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:41:08,146 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:41:08,146 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:41:08,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:41:08,147 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:41:08,147 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:41:08,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:08,148 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:41:08,149 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:41:08,149 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:41:08,150 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:41:08,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:41:08,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:41:08,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:41:08,151 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:41:08,152 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:41:08,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:41:08,153 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_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c35b909c90b92e30d40b0275e3d226db26dbebaf39dc73a31d7e72eee871d214 [2023-11-26 10:41:08,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:41:08,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:41:08,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:41:08,524 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:41:08,525 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:41:08,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread-atomic/lamport.i [2023-11-26 10:41:11,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:41:11,912 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:41:11,913 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/sv-benchmarks/c/pthread-atomic/lamport.i [2023-11-26 10:41:11,937 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/data/0d15f491d/084db3d9481345f988b020568b31a225/FLAGb17c992e6 [2023-11-26 10:41:11,959 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/data/0d15f491d/084db3d9481345f988b020568b31a225 [2023-11-26 10:41:11,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:41:11,968 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:41:11,971 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:11,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:41:11,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:41:11,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:11" (1/1) ... [2023-11-26 10:41:11,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4718405a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:11, skipping insertion in model container [2023-11-26 10:41:11,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:11" (1/1) ... [2023-11-26 10:41:12,079 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:41:12,437 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_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/sv-benchmarks/c/pthread-atomic/lamport.i[32156,32169] [2023-11-26 10:41:12,447 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_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/sv-benchmarks/c/pthread-atomic/lamport.i[34083,34096] [2023-11-26 10:41:12,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:12,463 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:41:12,504 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_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/sv-benchmarks/c/pthread-atomic/lamport.i[32156,32169] [2023-11-26 10:41:12,509 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_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/sv-benchmarks/c/pthread-atomic/lamport.i[34083,34096] [2023-11-26 10:41:12,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:12,549 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:41:12,550 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:41:12,557 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:41:12,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12 WrapperNode [2023-11-26 10:41:12,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:12,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:12,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:41:12,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:41:12,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,582 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,602 INFO L138 Inliner]: procedures = 170, calls = 82, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2023-11-26 10:41:12,602 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:12,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:41:12,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:41:12,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:41:12,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,620 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,635 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 10:41:12,635 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,635 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,667 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,673 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,676 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:41:12,685 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:41:12,685 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:41:12,685 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:41:12,686 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (1/1) ... [2023-11-26 10:41:12,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:12,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:12,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:41:12,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:41:12,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:41:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:41:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:41:12,780 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-26 10:41:12,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-26 10:41:12,780 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-26 10:41:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-26 10:41:12,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:41:12,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:41:12,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:41:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:41:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:41:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:41:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:41:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:41:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:41:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:41:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:41:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:41:12,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:41:12,786 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:41:12,956 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:41:12,959 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:41:13,188 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:41:13,338 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:41:13,338 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-26 10:41:13,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:13 BoogieIcfgContainer [2023-11-26 10:41:13,339 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:41:13,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:41:13,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:41:13,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:41:13,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:41:11" (1/3) ... [2023-11-26 10:41:13,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8e0f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:13, skipping insertion in model container [2023-11-26 10:41:13,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:12" (2/3) ... [2023-11-26 10:41:13,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8e0f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:13, skipping insertion in model container [2023-11-26 10:41:13,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:13" (3/3) ... [2023-11-26 10:41:13,355 INFO L112 eAbstractionObserver]: Analyzing ICFG lamport.i [2023-11-26 10:41:13,364 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:41:13,376 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:41:13,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 10:41:13,376 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:41:13,490 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:41:13,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 89 transitions, 192 flow [2023-11-26 10:41:13,607 INFO L124 PetriNetUnfolderBase]: 18/87 cut-off events. [2023-11-26 10:41:13,608 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:41:13,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 18/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 228 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-11-26 10:41:13,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 89 transitions, 192 flow [2023-11-26 10:41:13,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 85 transitions, 179 flow [2023-11-26 10:41:13,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:41:13,656 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@57d992a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:41:13,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-26 10:41:13,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:41:13,675 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-26 10:41:13,675 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:41:13,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:13,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:13,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:13,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1224895087, now seen corresponding path program 1 times [2023-11-26 10:41:13,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:13,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528607872] [2023-11-26 10:41:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:13,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:13,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:13,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528607872] [2023-11-26 10:41:13,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528607872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:13,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:13,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:13,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219813049] [2023-11-26 10:41:13,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:13,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:41:13,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:41:13,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:41:13,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 89 [2023-11-26 10:41:13,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 85 transitions, 179 flow. Second operand has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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) [2023-11-26 10:41:13,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:13,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 89 [2023-11-26 10:41:13,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:14,128 INFO L124 PetriNetUnfolderBase]: 172/547 cut-off events. [2023-11-26 10:41:14,128 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-26 10:41:14,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 547 events. 172/547 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3118 event pairs, 54 based on Foata normal form. 85/527 useless extension candidates. Maximal degree in co-relation 701. Up to 201 conditions per place. [2023-11-26 10:41:14,140 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 17 selfloop transitions, 0 changer transitions 0/79 dead transitions. [2023-11-26 10:41:14,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 201 flow [2023-11-26 10:41:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:41:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-26 10:41:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2023-11-26 10:41:14,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.848314606741573 [2023-11-26 10:41:14,155 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2023-11-26 10:41:14,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2023-11-26 10:41:14,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:14,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2023-11-26 10:41:14,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 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) [2023-11-26 10:41:14,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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) [2023-11-26 10:41:14,172 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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) [2023-11-26 10:41:14,174 INFO L175 Difference]: Start difference. First operand has 74 places, 85 transitions, 179 flow. Second operand 2 states and 151 transitions. [2023-11-26 10:41:14,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 201 flow [2023-11-26 10:41:14,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:41:14,182 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 162 flow [2023-11-26 10:41:14,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-11-26 10:41:14,189 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2023-11-26 10:41:14,189 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 162 flow [2023-11-26 10:41:14,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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) [2023-11-26 10:41:14,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:14,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:14,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:41:14,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:14,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1982847106, now seen corresponding path program 1 times [2023-11-26 10:41:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:14,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366544403] [2023-11-26 10:41:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:14,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:14,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366544403] [2023-11-26 10:41:14,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366544403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:14,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:14,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:41:14,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333168801] [2023-11-26 10:41:14,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:14,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:14,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 89 [2023-11-26 10:41:14,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2023-11-26 10:41:14,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:14,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 89 [2023-11-26 10:41:14,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:14,552 INFO L124 PetriNetUnfolderBase]: 261/695 cut-off events. [2023-11-26 10:41:14,552 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-26 10:41:14,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 695 events. 261/695 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4181 event pairs, 57 based on Foata normal form. 20/617 useless extension candidates. Maximal degree in co-relation 1053. Up to 215 conditions per place. [2023-11-26 10:41:14,565 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 27 selfloop transitions, 3 changer transitions 1/89 dead transitions. [2023-11-26 10:41:14,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 245 flow [2023-11-26 10:41:14,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:41:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-11-26 10:41:14,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.797752808988764 [2023-11-26 10:41:14,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-11-26 10:41:14,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-11-26 10:41:14,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:14,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-11-26 10:41:14,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:14,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-26 10:41:14,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-26 10:41:14,579 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 162 flow. Second operand 3 states and 213 transitions. [2023-11-26 10:41:14,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 245 flow [2023-11-26 10:41:14,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 89 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:41:14,585 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 182 flow [2023-11-26 10:41:14,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2023-11-26 10:41:14,592 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-11-26 10:41:14,593 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 182 flow [2023-11-26 10:41:14,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2023-11-26 10:41:14,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:14,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:14,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:41:14,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:14,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash -246904762, now seen corresponding path program 1 times [2023-11-26 10:41:14,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:14,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494239047] [2023-11-26 10:41:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:14,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:14,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:14,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494239047] [2023-11-26 10:41:14,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494239047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:14,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:14,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:41:14,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513646762] [2023-11-26 10:41:14,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:14,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:14,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:14,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:14,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:14,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 89 [2023-11-26 10:41:14,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2023-11-26 10:41:14,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:14,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 89 [2023-11-26 10:41:14,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:14,895 INFO L124 PetriNetUnfolderBase]: 270/708 cut-off events. [2023-11-26 10:41:14,895 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-26 10:41:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 708 events. 270/708 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4318 event pairs, 81 based on Foata normal form. 20/624 useless extension candidates. Maximal degree in co-relation 1209. Up to 276 conditions per place. [2023-11-26 10:41:14,903 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 25 selfloop transitions, 2 changer transitions 4/89 dead transitions. [2023-11-26 10:41:14,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 263 flow [2023-11-26 10:41:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:41:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-11-26 10:41:14,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.797752808988764 [2023-11-26 10:41:14,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-11-26 10:41:14,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-11-26 10:41:14,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:14,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-11-26 10:41:14,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:14,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-26 10:41:14,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-26 10:41:14,910 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 182 flow. Second operand 3 states and 213 transitions. [2023-11-26 10:41:14,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 263 flow [2023-11-26 10:41:14,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:41:14,916 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 186 flow [2023-11-26 10:41:14,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2023-11-26 10:41:14,918 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-11-26 10:41:14,918 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 186 flow [2023-11-26 10:41:14,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2023-11-26 10:41:14,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:14,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:14,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:41:14,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:14,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1019058988, now seen corresponding path program 1 times [2023-11-26 10:41:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:14,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799807785] [2023-11-26 10:41:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:14,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:15,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:15,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799807785] [2023-11-26 10:41:15,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799807785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:15,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:15,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:41:15,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255476801] [2023-11-26 10:41:15,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:15,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:15,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:15,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:15,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:15,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2023-11-26 10:41:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2023-11-26 10:41:15,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:15,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2023-11-26 10:41:15,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:15,507 INFO L124 PetriNetUnfolderBase]: 846/2100 cut-off events. [2023-11-26 10:41:15,507 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2023-11-26 10:41:15,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3539 conditions, 2100 events. 846/2100 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15226 event pairs, 203 based on Foata normal form. 56/2026 useless extension candidates. Maximal degree in co-relation 3533. Up to 645 conditions per place. [2023-11-26 10:41:15,524 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 49 selfloop transitions, 10 changer transitions 11/122 dead transitions. [2023-11-26 10:41:15,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 122 transitions, 413 flow [2023-11-26 10:41:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 343 transitions. [2023-11-26 10:41:15,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7707865168539326 [2023-11-26 10:41:15,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 343 transitions. [2023-11-26 10:41:15,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 343 transitions. [2023-11-26 10:41:15,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:15,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 343 transitions. [2023-11-26 10:41:15,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 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) [2023-11-26 10:41:15,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:15,534 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:15,534 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 186 flow. Second operand 5 states and 343 transitions. [2023-11-26 10:41:15,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 122 transitions, 413 flow [2023-11-26 10:41:15,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 122 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:15,542 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 290 flow [2023-11-26 10:41:15,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2023-11-26 10:41:15,544 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2023-11-26 10:41:15,545 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 290 flow [2023-11-26 10:41:15,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2023-11-26 10:41:15,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:15,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:15,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:41:15,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:15,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:15,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1185317750, now seen corresponding path program 2 times [2023-11-26 10:41:15,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:15,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751352170] [2023-11-26 10:41:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:15,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:15,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751352170] [2023-11-26 10:41:15,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751352170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:15,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:15,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:41:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955712929] [2023-11-26 10:41:15,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:15,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:15,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:15,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2023-11-26 10:41:15,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2023-11-26 10:41:15,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:15,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2023-11-26 10:41:15,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:16,193 INFO L124 PetriNetUnfolderBase]: 1079/2808 cut-off events. [2023-11-26 10:41:16,193 INFO L125 PetriNetUnfolderBase]: For 1323/1493 co-relation queries the response was YES. [2023-11-26 10:41:16,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5909 conditions, 2808 events. 1079/2808 cut-off events. For 1323/1493 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21382 event pairs, 302 based on Foata normal form. 128/2818 useless extension candidates. Maximal degree in co-relation 5900. Up to 991 conditions per place. [2023-11-26 10:41:16,219 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 48 selfloop transitions, 11 changer transitions 13/130 dead transitions. [2023-11-26 10:41:16,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 130 transitions, 555 flow [2023-11-26 10:41:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 341 transitions. [2023-11-26 10:41:16,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7662921348314606 [2023-11-26 10:41:16,222 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 341 transitions. [2023-11-26 10:41:16,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 341 transitions. [2023-11-26 10:41:16,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:16,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 341 transitions. [2023-11-26 10:41:16,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 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) [2023-11-26 10:41:16,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:16,225 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:16,226 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 290 flow. Second operand 5 states and 341 transitions. [2023-11-26 10:41:16,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 130 transitions, 555 flow [2023-11-26 10:41:16,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 527 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:16,238 INFO L231 Difference]: Finished difference. Result has 90 places, 98 transitions, 380 flow [2023-11-26 10:41:16,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=90, PETRI_TRANSITIONS=98} [2023-11-26 10:41:16,239 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2023-11-26 10:41:16,239 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 98 transitions, 380 flow [2023-11-26 10:41:16,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2023-11-26 10:41:16,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:16,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:16,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:41:16,240 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:16,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:16,241 INFO L85 PathProgramCache]: Analyzing trace with hash 738454086, now seen corresponding path program 3 times [2023-11-26 10:41:16,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:16,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866959359] [2023-11-26 10:41:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:16,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:16,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:16,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866959359] [2023-11-26 10:41:16,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866959359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:16,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:16,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:41:16,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600917455] [2023-11-26 10:41:16,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:16,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:16,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:16,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:16,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:16,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 89 [2023-11-26 10:41:16,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 98 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 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) [2023-11-26 10:41:16,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:16,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 89 [2023-11-26 10:41:16,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:16,810 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([375] L840-->thr2EXIT: Formula: (and (= |v_thr2Thread1of1ForFork0_#res.base_1| 0) (= |v_thr2Thread1of1ForFork0_#res.offset_1| 0)) InVars {} OutVars{thr2Thread1of1ForFork0_#res.base=|v_thr2Thread1of1ForFork0_#res.base_1|, thr2Thread1of1ForFork0_#res.offset=|v_thr2Thread1of1ForFork0_#res.offset_1|} AuxVars[] AssignedVars[thr2Thread1of1ForFork0_#res.base, thr2Thread1of1ForFork0_#res.offset][83], [Black: 100#(and (= thr2Thread1of1ForFork0_~y2~0 1) (= ~y~0 1)), 73#L710true, Black: 97#(= ~y~0 1), 50#thr2EXITtrue, 117#true, thr2Thread1of1ForFork0InUse, 95#true, 81#true, Black: 111#(and (= 2 thr1Thread1of1ForFork1_~y1~0) (= 2 ~y~0)), 106#true, Black: 108#(= 2 ~y~0), Black: 109#(= 2 thr1Thread1of1ForFork1_~y1~0), 39#L847-1true, Black: 86#(= ~X~0 0), 92#(= ~X~0 1)]) [2023-11-26 10:41:16,810 INFO L294 olderBase$Statistics]: this new event has 40 ancestors and is cut-off event [2023-11-26 10:41:16,811 INFO L297 olderBase$Statistics]: existing Event has 33 ancestors and is cut-off event [2023-11-26 10:41:16,811 INFO L297 olderBase$Statistics]: existing Event has 30 ancestors and is cut-off event [2023-11-26 10:41:16,811 INFO L297 olderBase$Statistics]: existing Event has 25 ancestors and is cut-off event [2023-11-26 10:41:17,115 INFO L124 PetriNetUnfolderBase]: 1811/5522 cut-off events. [2023-11-26 10:41:17,115 INFO L125 PetriNetUnfolderBase]: For 2634/2960 co-relation queries the response was YES. [2023-11-26 10:41:17,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11487 conditions, 5522 events. 1811/5522 cut-off events. For 2634/2960 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 51049 event pairs, 343 based on Foata normal form. 176/5337 useless extension candidates. Maximal degree in co-relation 11475. Up to 786 conditions per place. [2023-11-26 10:41:17,175 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 58 selfloop transitions, 6 changer transitions 0/141 dead transitions. [2023-11-26 10:41:17,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 141 transitions, 642 flow [2023-11-26 10:41:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 365 transitions. [2023-11-26 10:41:17,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8202247191011236 [2023-11-26 10:41:17,178 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 365 transitions. [2023-11-26 10:41:17,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 365 transitions. [2023-11-26 10:41:17,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:17,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 365 transitions. [2023-11-26 10:41:17,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 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) [2023-11-26 10:41:17,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:17,182 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:17,182 INFO L175 Difference]: Start difference. First operand has 90 places, 98 transitions, 380 flow. Second operand 5 states and 365 transitions. [2023-11-26 10:41:17,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 141 transitions, 642 flow [2023-11-26 10:41:17,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 612 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:17,275 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 414 flow [2023-11-26 10:41:17,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=414, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2023-11-26 10:41:17,276 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2023-11-26 10:41:17,276 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 414 flow [2023-11-26 10:41:17,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 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) [2023-11-26 10:41:17,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:17,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:17,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:41:17,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:17,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1962866396, now seen corresponding path program 4 times [2023-11-26 10:41:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:17,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615157081] [2023-11-26 10:41:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:17,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:17,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:17,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615157081] [2023-11-26 10:41:17,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615157081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:17,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:17,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:41:17,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972574783] [2023-11-26 10:41:17,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:17,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:17,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:17,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:17,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:17,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 89 [2023-11-26 10:41:17,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 414 flow. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 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) [2023-11-26 10:41:17,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:17,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 89 [2023-11-26 10:41:17,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:18,637 INFO L124 PetriNetUnfolderBase]: 2683/8284 cut-off events. [2023-11-26 10:41:18,637 INFO L125 PetriNetUnfolderBase]: For 4380/4815 co-relation queries the response was YES. [2023-11-26 10:41:18,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17411 conditions, 8284 events. 2683/8284 cut-off events. For 4380/4815 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 80664 event pairs, 478 based on Foata normal form. 293/8239 useless extension candidates. Maximal degree in co-relation 17396. Up to 1221 conditions per place. [2023-11-26 10:41:18,737 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 63 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2023-11-26 10:41:18,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 729 flow [2023-11-26 10:41:18,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2023-11-26 10:41:18,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8292134831460675 [2023-11-26 10:41:18,741 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2023-11-26 10:41:18,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2023-11-26 10:41:18,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:18,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2023-11-26 10:41:18,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 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) [2023-11-26 10:41:18,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:18,745 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:18,745 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 414 flow. Second operand 5 states and 369 transitions. [2023-11-26 10:41:18,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 729 flow [2023-11-26 10:41:18,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 153 transitions, 729 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:41:18,761 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 508 flow [2023-11-26 10:41:18,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=508, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2023-11-26 10:41:18,763 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2023-11-26 10:41:18,763 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 508 flow [2023-11-26 10:41:18,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 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) [2023-11-26 10:41:18,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:18,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:18,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:41:18,764 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:18,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:18,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1271307899, now seen corresponding path program 1 times [2023-11-26 10:41:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:18,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340380014] [2023-11-26 10:41:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:18,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:18,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:18,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340380014] [2023-11-26 10:41:18,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340380014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:18,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:18,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:41:18,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964422304] [2023-11-26 10:41:18,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:18,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:18,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:18,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:18,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:18,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 89 [2023-11-26 10:41:18,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 508 flow. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2023-11-26 10:41:18,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:18,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 89 [2023-11-26 10:41:18,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:19,519 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([372] L777-->L780: Formula: (= 2 v_~x~0_1) InVars {} OutVars{~x~0=v_~x~0_1} AuxVars[] AssignedVars[~x~0][18], [60#L780true, Black: 100#(and (= thr2Thread1of1ForFork0_~y2~0 1) (= ~y~0 1)), Black: 130#(= ~x~0 1), Black: 131#(= thr2Thread1of1ForFork0_~x2~0 1), Black: 95#true, Black: 133#(and (= thr2Thread1of1ForFork0_~x2~0 1) (= ~x~0 1)), 97#(= ~y~0 1), thr2Thread1of1ForFork0InUse, 81#true, 119#(= 2 ~x~0), Black: 111#(and (= 2 thr1Thread1of1ForFork1_~y1~0) (= 2 ~y~0)), 106#true, Black: 108#(= 2 ~y~0), 15#L733true, 141#(= ~b2~0 1), 128#true, Black: 84#true, 7#L846-4true, Black: 120#(= 2 thr1Thread1of1ForFork1_~x1~0), Black: 122#(and (= 2 ~x~0) (= 2 thr1Thread1of1ForFork1_~x1~0)), Black: 117#true, Black: 92#(= ~X~0 1)]) [2023-11-26 10:41:19,519 INFO L294 olderBase$Statistics]: this new event has 41 ancestors and is cut-off event [2023-11-26 10:41:19,519 INFO L297 olderBase$Statistics]: existing Event has 26 ancestors and is cut-off event [2023-11-26 10:41:19,519 INFO L297 olderBase$Statistics]: existing Event has 33 ancestors and is cut-off event [2023-11-26 10:41:19,520 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-11-26 10:41:19,548 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([372] L777-->L780: Formula: (= 2 v_~x~0_1) InVars {} OutVars{~x~0=v_~x~0_1} AuxVars[] AssignedVars[~x~0][18], [60#L780true, Black: 100#(and (= thr2Thread1of1ForFork0_~y2~0 1) (= ~y~0 1)), Black: 130#(= ~x~0 1), Black: 95#true, Black: 131#(= thr2Thread1of1ForFork0_~x2~0 1), Black: 133#(and (= thr2Thread1of1ForFork0_~x2~0 1) (= ~x~0 1)), 97#(= ~y~0 1), thr2Thread1of1ForFork0InUse, 81#true, 119#(= 2 ~x~0), Black: 111#(and (= 2 thr1Thread1of1ForFork1_~y1~0) (= 2 ~y~0)), 106#true, Black: 108#(= 2 ~y~0), 15#L733true, 141#(= ~b2~0 1), 39#L847-1true, Black: 84#true, 128#true, Black: 120#(= 2 thr1Thread1of1ForFork1_~x1~0), Black: 122#(and (= 2 ~x~0) (= 2 thr1Thread1of1ForFork1_~x1~0)), Black: 92#(= ~X~0 1), Black: 117#true]) [2023-11-26 10:41:19,549 INFO L294 olderBase$Statistics]: this new event has 42 ancestors and is cut-off event [2023-11-26 10:41:19,549 INFO L297 olderBase$Statistics]: existing Event has 27 ancestors and is cut-off event [2023-11-26 10:41:19,549 INFO L297 olderBase$Statistics]: existing Event has 19 ancestors and is cut-off event [2023-11-26 10:41:19,549 INFO L297 olderBase$Statistics]: existing Event has 34 ancestors and is cut-off event [2023-11-26 10:41:19,588 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([427] L737-->L744: Formula: (= v_~b2~0_5 v_thr1Thread1of1ForFork1_~b21~0_1) InVars {~b2~0=v_~b2~0_5} OutVars{~b2~0=v_~b2~0_5, thr1Thread1of1ForFork1_~b21~0=v_thr1Thread1of1ForFork1_~b21~0_1} AuxVars[] AssignedVars[thr1Thread1of1ForFork1_~b21~0][42], [130#(= ~x~0 1), Black: 100#(and (= thr2Thread1of1ForFork0_~y2~0 1) (= ~y~0 1)), Black: 128#true, Black: 131#(= thr2Thread1of1ForFork0_~x2~0 1), Black: 95#true, Black: 133#(and (= thr2Thread1of1ForFork0_~x2~0 1) (= ~x~0 1)), 117#true, 97#(= ~y~0 1), thr2Thread1of1ForFork0InUse, 81#true, Black: 111#(and (= 2 thr1Thread1of1ForFork1_~y1~0) (= 2 ~y~0)), 106#true, Black: 108#(= 2 ~y~0), 28#L777true, Black: 84#true, 7#L846-4true, Black: 120#(= 2 thr1Thread1of1ForFork1_~x1~0), Black: 122#(and (= 2 ~x~0) (= 2 thr1Thread1of1ForFork1_~x1~0)), 68#L744true, 144#(and (= thr1Thread1of1ForFork1_~b21~0 1) (= ~b2~0 1)), Black: 92#(= ~X~0 1), Black: 119#(= 2 ~x~0)]) [2023-11-26 10:41:19,588 INFO L294 olderBase$Statistics]: this new event has 43 ancestors and is cut-off event [2023-11-26 10:41:19,588 INFO L297 olderBase$Statistics]: existing Event has 20 ancestors and is cut-off event [2023-11-26 10:41:19,589 INFO L297 olderBase$Statistics]: existing Event has 28 ancestors and is cut-off event [2023-11-26 10:41:19,589 INFO L297 olderBase$Statistics]: existing Event has 35 ancestors and is cut-off event [2023-11-26 10:41:19,621 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([427] L737-->L744: Formula: (= v_~b2~0_5 v_thr1Thread1of1ForFork1_~b21~0_1) InVars {~b2~0=v_~b2~0_5} OutVars{~b2~0=v_~b2~0_5, thr1Thread1of1ForFork1_~b21~0=v_thr1Thread1of1ForFork1_~b21~0_1} AuxVars[] AssignedVars[thr1Thread1of1ForFork1_~b21~0][42], [130#(= ~x~0 1), Black: 100#(and (= thr2Thread1of1ForFork0_~y2~0 1) (= ~y~0 1)), Black: 128#true, Black: 95#true, Black: 131#(= thr2Thread1of1ForFork0_~x2~0 1), Black: 133#(and (= thr2Thread1of1ForFork0_~x2~0 1) (= ~x~0 1)), 117#true, 97#(= ~y~0 1), thr2Thread1of1ForFork0InUse, 81#true, Black: 111#(and (= 2 thr1Thread1of1ForFork1_~y1~0) (= 2 ~y~0)), 106#true, Black: 108#(= 2 ~y~0), 39#L847-1true, 28#L777true, Black: 84#true, Black: 120#(= 2 thr1Thread1of1ForFork1_~x1~0), 68#L744true, 144#(and (= thr1Thread1of1ForFork1_~b21~0 1) (= ~b2~0 1)), Black: 122#(and (= 2 ~x~0) (= 2 thr1Thread1of1ForFork1_~x1~0)), Black: 92#(= ~X~0 1), Black: 119#(= 2 ~x~0)]) [2023-11-26 10:41:19,621 INFO L294 olderBase$Statistics]: this new event has 44 ancestors and is cut-off event [2023-11-26 10:41:19,622 INFO L297 olderBase$Statistics]: existing Event has 36 ancestors and is cut-off event [2023-11-26 10:41:19,622 INFO L297 olderBase$Statistics]: existing Event has 21 ancestors and is cut-off event [2023-11-26 10:41:19,622 INFO L297 olderBase$Statistics]: existing Event has 29 ancestors and is cut-off event [2023-11-26 10:41:20,055 INFO L124 PetriNetUnfolderBase]: 2708/7998 cut-off events. [2023-11-26 10:41:20,056 INFO L125 PetriNetUnfolderBase]: For 3371/3583 co-relation queries the response was YES. [2023-11-26 10:41:20,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16968 conditions, 7998 events. 2708/7998 cut-off events. For 3371/3583 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 76671 event pairs, 983 based on Foata normal form. 246/7847 useless extension candidates. Maximal degree in co-relation 16949. Up to 2683 conditions per place. [2023-11-26 10:41:20,130 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 37 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2023-11-26 10:41:20,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 655 flow [2023-11-26 10:41:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2023-11-26 10:41:20,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7640449438202247 [2023-11-26 10:41:20,133 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2023-11-26 10:41:20,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2023-11-26 10:41:20,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:20,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2023-11-26 10:41:20,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 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) [2023-11-26 10:41:20,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:20,137 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:20,137 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 508 flow. Second operand 5 states and 340 transitions. [2023-11-26 10:41:20,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 655 flow [2023-11-26 10:41:20,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 135 transitions, 651 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-26 10:41:20,155 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 561 flow [2023-11-26 10:41:20,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=561, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2023-11-26 10:41:20,159 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2023-11-26 10:41:20,159 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 561 flow [2023-11-26 10:41:20,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2023-11-26 10:41:20,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:20,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:20,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:41:20,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:20,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash -85635478, now seen corresponding path program 1 times [2023-11-26 10:41:20,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:20,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550475050] [2023-11-26 10:41:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:20,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:20,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:20,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550475050] [2023-11-26 10:41:20,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550475050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:20,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:20,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:41:20,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214652796] [2023-11-26 10:41:20,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:20,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:20,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:20,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:20,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 89 [2023-11-26 10:41:20,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 561 flow. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2023-11-26 10:41:20,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:20,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 89 [2023-11-26 10:41:20,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:20,770 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([375] L840-->thr2EXIT: Formula: (and (= |v_thr2Thread1of1ForFork0_#res.base_1| 0) (= |v_thr2Thread1of1ForFork0_#res.offset_1| 0)) InVars {} OutVars{thr2Thread1of1ForFork0_#res.base=|v_thr2Thread1of1ForFork0_#res.base_1|, thr2Thread1of1ForFork0_#res.offset=|v_thr2Thread1of1ForFork0_#res.offset_1|} AuxVars[] AssignedVars[thr2Thread1of1ForFork0_#res.base, thr2Thread1of1ForFork0_#res.offset][85], [139#true, Black: 130#(= ~x~0 1), Black: 131#(= thr2Thread1of1ForFork0_~x2~0 1), Black: 133#(and (= thr2Thread1of1ForFork0_~x2~0 1) (= ~x~0 1)), 50#thr2EXITtrue, 66#L707true, 95#true, thr2Thread1of1ForFork0InUse, 81#true, 119#(= 2 ~x~0), Black: 141#(= ~b2~0 1), 106#true, Black: 144#(and (= thr1Thread1of1ForFork1_~b21~0 1) (= ~b2~0 1)), Black: 142#(= thr1Thread1of1ForFork1_~b21~0 1), 39#L847-1true, Black: 86#(= ~X~0 0), 128#true, 92#(= ~X~0 1), Black: 100#(and (= thr2Thread1of1ForFork0_~y2~0 1) (= ~y~0 1)), Black: 97#(= ~y~0 1), 151#(= ~b1~0 1), Black: 111#(and (= 2 thr1Thread1of1ForFork1_~y1~0) (= 2 ~y~0)), Black: 108#(= 2 ~y~0), Black: 120#(= 2 thr1Thread1of1ForFork1_~x1~0), Black: 122#(and (= 2 ~x~0) (= 2 thr1Thread1of1ForFork1_~x1~0)), Black: 117#true]) [2023-11-26 10:41:20,770 INFO L294 olderBase$Statistics]: this new event has 37 ancestors and is cut-off event [2023-11-26 10:41:20,771 INFO L297 olderBase$Statistics]: existing Event has 29 ancestors and is cut-off event [2023-11-26 10:41:20,771 INFO L297 olderBase$Statistics]: existing Event has 32 ancestors and is cut-off event [2023-11-26 10:41:20,771 INFO L297 olderBase$Statistics]: existing Event has 24 ancestors and is cut-off event [2023-11-26 10:41:21,351 INFO L124 PetriNetUnfolderBase]: 2291/7005 cut-off events. [2023-11-26 10:41:21,353 INFO L125 PetriNetUnfolderBase]: For 3408/3557 co-relation queries the response was YES. [2023-11-26 10:41:21,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15606 conditions, 7005 events. 2291/7005 cut-off events. For 3408/3557 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 66496 event pairs, 817 based on Foata normal form. 211/6933 useless extension candidates. Maximal degree in co-relation 15583. Up to 2176 conditions per place. [2023-11-26 10:41:21,407 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 0 selfloop transitions, 0 changer transitions 137/137 dead transitions. [2023-11-26 10:41:21,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 137 transitions, 690 flow [2023-11-26 10:41:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2023-11-26 10:41:21,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7685393258426966 [2023-11-26 10:41:21,410 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2023-11-26 10:41:21,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2023-11-26 10:41:21,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:21,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2023-11-26 10:41:21,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.4) internal successors, (342), 5 states have internal predecessors, (342), 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) [2023-11-26 10:41:21,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:21,414 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 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) [2023-11-26 10:41:21,415 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 561 flow. Second operand 5 states and 342 transitions. [2023-11-26 10:41:21,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 137 transitions, 690 flow [2023-11-26 10:41:21,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 137 transitions, 680 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:21,444 INFO L231 Difference]: Finished difference. Result has 110 places, 0 transitions, 0 flow [2023-11-26 10:41:21,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=110, PETRI_TRANSITIONS=0} [2023-11-26 10:41:21,445 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2023-11-26 10:41:21,446 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 0 transitions, 0 flow [2023-11-26 10:41:21,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2023-11-26 10:41:21,449 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-26 10:41:21,449 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-26 10:41:21,450 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-26 10:41:21,450 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-11-26 10:41:21,450 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-26 10:41:21,451 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-26 10:41:21,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:41:21,451 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2023-11-26 10:41:21,462 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-26 10:41:21,462 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 10:41:21,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 10:41:21 BasicIcfg [2023-11-26 10:41:21,475 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 10:41:21,476 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 10:41:21,476 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 10:41:21,476 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 10:41:21,476 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:13" (3/4) ... [2023-11-26 10:41:21,478 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-26 10:41:21,480 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thr2 [2023-11-26 10:41:21,481 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2023-11-26 10:41:21,485 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 33 nodes and edges [2023-11-26 10:41:21,485 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-11-26 10:41:21,485 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-26 10:41:21,485 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-26 10:41:21,580 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 10:41:21,581 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/witness.yml [2023-11-26 10:41:21,581 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 10:41:21,582 INFO L158 Benchmark]: Toolchain (without parser) took 9613.52ms. Allocated memory was 134.2MB in the beginning and 744.5MB in the end (delta: 610.3MB). Free memory was 69.6MB in the beginning and 402.9MB in the end (delta: -333.3MB). Peak memory consumption was 278.3MB. Max. memory is 16.1GB. [2023-11-26 10:41:21,582 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 134.2MB. Free memory was 106.9MB in the beginning and 106.8MB in the end (delta: 76.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:41:21,583 INFO L158 Benchmark]: CACSL2BoogieTranslator took 587.84ms. Allocated memory was 134.2MB in the beginning and 203.4MB in the end (delta: 69.2MB). Free memory was 69.4MB in the beginning and 159.7MB in the end (delta: -90.4MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2023-11-26 10:41:21,583 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.46ms. Allocated memory is still 203.4MB. Free memory was 158.9MB in the beginning and 157.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:41:21,584 INFO L158 Benchmark]: Boogie Preprocessor took 80.87ms. Allocated memory is still 203.4MB. Free memory was 157.6MB in the beginning and 154.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:41:21,584 INFO L158 Benchmark]: RCFGBuilder took 654.06ms. Allocated memory is still 203.4MB. Free memory was 154.7MB in the beginning and 132.5MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-26 10:41:21,584 INFO L158 Benchmark]: TraceAbstraction took 8133.69ms. Allocated memory was 203.4MB in the beginning and 744.5MB in the end (delta: 541.1MB). Free memory was 132.5MB in the beginning and 407.2MB in the end (delta: -274.7MB). Peak memory consumption was 268.2MB. Max. memory is 16.1GB. [2023-11-26 10:41:21,585 INFO L158 Benchmark]: Witness Printer took 105.25ms. Allocated memory is still 744.5MB. Free memory was 407.2MB in the beginning and 402.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 10:41:21,588 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 134.2MB. Free memory was 106.9MB in the beginning and 106.8MB in the end (delta: 76.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 587.84ms. Allocated memory was 134.2MB in the beginning and 203.4MB in the end (delta: 69.2MB). Free memory was 69.4MB in the beginning and 159.7MB in the end (delta: -90.4MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.46ms. Allocated memory is still 203.4MB. Free memory was 158.9MB in the beginning and 157.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 80.87ms. Allocated memory is still 203.4MB. Free memory was 157.6MB in the beginning and 154.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 654.06ms. Allocated memory is still 203.4MB. Free memory was 154.7MB in the beginning and 132.5MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 8133.69ms. Allocated memory was 203.4MB in the beginning and 744.5MB in the end (delta: 541.1MB). Free memory was 132.5MB in the beginning and 407.2MB in the end (delta: -274.7MB). Peak memory consumption was 268.2MB. Max. memory is 16.1GB. * Witness Printer took 105.25ms. Allocated memory is still 744.5MB. Free memory was 407.2MB in the beginning and 402.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 834]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 764]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 136 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.9s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 374 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 265 mSDsluCounter, 146 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 54 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 819 IncrementalHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 92 mSDtfsCounter, 819 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=561occurred in iteration=8, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 322 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-26 10:41:21,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c45915f-6aee-4bd4-86f9-c7f8fb06044f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE