./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC --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 82435f17481c054c9c5a8a1deca188b6bf36f1a34e751392b5a27cd7180adc30 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 22:55:44,659 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 22:55:44,761 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 22:55:44,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 22:55:44,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 22:55:44,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 22:55:44,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 22:55:44,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 22:55:44,806 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 22:55:44,806 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 22:55:44,806 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 22:55:44,806 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 22:55:44,806 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 22:55:44,806 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 22:55:44,806 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 22:55:44,807 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 22:55:44,807 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 22:55:44,807 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 22:55:44,810 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 22:55:44,810 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 22:55:44,810 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 22:55:44,810 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 22:55:44,810 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 22:55:44,810 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 22:55:44,811 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 22:55:44,811 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 22:55:44,811 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 22:55:44,811 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 22:55:44,811 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 22:55:44,811 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:55:44,811 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:55:44,811 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:55:44,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:55:44,812 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 22:55:44,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:55:44,812 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:55:44,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:55:44,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:55:44,812 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 22:55:44,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 22:55:44,812 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 22:55:44,813 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 22:55:44,813 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 22:55:44,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 22:55:44,813 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 22:55:44,813 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 22:55:44,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 22:55:44,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 22:55:44,813 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC 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 -> 82435f17481c054c9c5a8a1deca188b6bf36f1a34e751392b5a27cd7180adc30 [2024-11-23 22:55:45,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 22:55:45,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 22:55:45,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 22:55:45,128 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 22:55:45,128 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 22:55:45,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-11-23 22:55:48,202 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/data/b5e3a6d9b/c4437e13d88a4a4bb85c4adc97db6dcc/FLAGed659c972 [2024-11-23 22:55:48,590 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 22:55:48,591 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-11-23 22:55:48,611 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/data/b5e3a6d9b/c4437e13d88a4a4bb85c4adc97db6dcc/FLAGed659c972 [2024-11-23 22:55:48,638 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/data/b5e3a6d9b/c4437e13d88a4a4bb85c4adc97db6dcc [2024-11-23 22:55:48,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 22:55:48,646 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 22:55:48,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 22:55:48,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 22:55:48,661 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 22:55:48,662 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:55:48" (1/1) ... [2024-11-23 22:55:48,663 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa8eb23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:48, skipping insertion in model container [2024-11-23 22:55:48,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:55:48" (1/1) ... [2024-11-23 22:55:48,715 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 22:55:49,136 WARN L250 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_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[31044,31057] [2024-11-23 22:55:49,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:55:49,166 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 22:55:49,211 WARN L250 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_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[31044,31057] [2024-11-23 22:55:49,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:55:49,261 INFO L204 MainTranslator]: Completed translation [2024-11-23 22:55:49,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49 WrapperNode [2024-11-23 22:55:49,262 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 22:55:49,263 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 22:55:49,263 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 22:55:49,263 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 22:55:49,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,285 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,306 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2024-11-23 22:55:49,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 22:55:49,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 22:55:49,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 22:55:49,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 22:55:49,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,324 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,339 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 5, 1]. The 2 writes are split as follows [0, 0, 2]. [2024-11-23 22:55:49,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,346 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,360 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,361 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,364 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 22:55:49,365 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 22:55:49,365 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 22:55:49,365 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 22:55:49,366 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (1/1) ... [2024-11-23 22:55:49,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:55:49,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:55:49,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 22:55:49,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79e80c07-6aea-419c-8a5f-43e0ef4c4eb3/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 22:55:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 22:55:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 22:55:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-23 22:55:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-23 22:55:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-23 22:55:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 22:55:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 22:55:49,436 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 22:55:49,609 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 22:55:49,611 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 22:55:49,980 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 22:55:49,980 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 22:55:50,476 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 22:55:50,476 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 22:55:50,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:55:50 BoogieIcfgContainer [2024-11-23 22:55:50,476 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 22:55:50,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 22:55:50,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 22:55:50,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 22:55:50,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:55:48" (1/3) ... [2024-11-23 22:55:50,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58849af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:55:50, skipping insertion in model container [2024-11-23 22:55:50,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:49" (2/3) ... [2024-11-23 22:55:50,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58849af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:55:50, skipping insertion in model container [2024-11-23 22:55:50,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:55:50" (3/3) ... [2024-11-23 22:55:50,489 INFO L128 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2024-11-23 22:55:50,510 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 22:55:50,512 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 37_stack_lock_p0_vs_concur.i that has 2 procedures, 23 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-23 22:55:50,512 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 22:55:50,577 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-23 22:55:50,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 26 transitions, 56 flow [2024-11-23 22:55:50,650 INFO L124 PetriNetUnfolderBase]: 3/28 cut-off events. [2024-11-23 22:55:50,652 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 22:55:50,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 28 events. 3/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-23 22:55:50,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 26 transitions, 56 flow [2024-11-23 22:55:50,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 26 transitions, 56 flow [2024-11-23 22:55:50,666 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:55:50,679 INFO L333 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, 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;@425a1821, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:55:50,682 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-23 22:55:50,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 22:55:50,692 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-11-23 22:55:50,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 22:55:50,692 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:55:50,693 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 22:55:50,694 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:55:50,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:55:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1444549967, now seen corresponding path program 1 times [2024-11-23 22:55:50,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:55:50,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490491780] [2024-11-23 22:55:50,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:55:50,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:55:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 22:55:51,600 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-23 22:55:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 22:55:51,701 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-23 22:55:51,703 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-23 22:55:51,705 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-23 22:55:51,711 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-23 22:55:51,711 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-23 22:55:51,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 22:55:51,712 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2024-11-23 22:55:51,718 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-23 22:55:51,719 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-23 22:55:51,771 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-23 22:55:51,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 47 transitions, 104 flow [2024-11-23 22:55:51,800 INFO L124 PetriNetUnfolderBase]: 6/52 cut-off events. [2024-11-23 22:55:51,801 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 22:55:51,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 52 events. 6/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 111 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 43. Up to 3 conditions per place. [2024-11-23 22:55:51,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 47 transitions, 104 flow [2024-11-23 22:55:51,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 47 transitions, 104 flow [2024-11-23 22:55:51,805 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:55:51,806 INFO L333 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, 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;@425a1821, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:55:51,806 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-23 22:55:51,824 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 22:55:51,824 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2024-11-23 22:55:51,824 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 22:55:51,824 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:55:51,824 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-23 22:55:51,825 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-23 22:55:51,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:55:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1329412854, now seen corresponding path program 1 times [2024-11-23 22:55:51,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:55:51,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287528802] [2024-11-23 22:55:51,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:55:51,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:55:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 22:55:52,287 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-23 22:55:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 22:55:52,341 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-23 22:55:52,345 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-23 22:55:52,345 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-23 22:55:52,345 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-23 22:55:52,345 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-23 22:55:52,345 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-23 22:55:52,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 22:55:52,346 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2024-11-23 22:55:52,346 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-23 22:55:52,346 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-23 22:55:52,404 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-23 22:55:52,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 68 transitions, 154 flow [2024-11-23 22:55:52,442 INFO L124 PetriNetUnfolderBase]: 9/76 cut-off events. [2024-11-23 22:55:52,442 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-23 22:55:52,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 9/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 222 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 63. Up to 4 conditions per place. [2024-11-23 22:55:52,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 68 transitions, 154 flow [2024-11-23 22:55:52,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 68 transitions, 154 flow [2024-11-23 22:55:52,447 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:55:52,449 INFO L333 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, 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;@425a1821, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:55:52,449 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-23 22:55:52,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 22:55:52,470 INFO L124 PetriNetUnfolderBase]: 1/40 cut-off events. [2024-11-23 22:55:52,471 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-23 22:55:52,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:55:52,471 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-11-23 22:55:52,472 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-23 22:55:52,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:55:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash 198691728, now seen corresponding path program 1 times [2024-11-23 22:55:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:55:52,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135832134] [2024-11-23 22:55:52,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:55:52,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:55:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 22:55:52,786 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-23 22:55:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 22:55:52,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-23 22:55:52,830 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-23 22:55:52,831 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-23 22:55:52,831 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-23 22:55:52,831 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-23 22:55:52,831 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-23 22:55:52,831 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-23 22:55:52,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 22:55:52,832 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2024-11-23 22:55:52,836 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-23 22:55:52,837 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-23 22:55:52,902 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-23 22:55:52,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 89 transitions, 206 flow [2024-11-23 22:55:52,958 INFO L124 PetriNetUnfolderBase]: 12/100 cut-off events. [2024-11-23 22:55:52,960 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-23 22:55:52,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 100 events. 12/100 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 309 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 88. Up to 5 conditions per place. [2024-11-23 22:55:52,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 89 transitions, 206 flow [2024-11-23 22:55:52,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 89 transitions, 206 flow [2024-11-23 22:55:52,968 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:55:52,972 INFO L333 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, 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;@425a1821, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:55:52,972 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-23 22:55:52,988 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 22:55:52,989 INFO L124 PetriNetUnfolderBase]: 2/51 cut-off events. [2024-11-23 22:55:52,990 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-23 22:55:52,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:55:52,990 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:55:52,990 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-23 22:55:52,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:55:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1593617049, now seen corresponding path program 1 times [2024-11-23 22:55:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:55:52,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477176481] [2024-11-23 22:55:52,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:55:52,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:55:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:55:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:55:53,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:55:53,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477176481] [2024-11-23 22:55:53,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477176481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:55:53,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:55:53,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:55:53,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766133873] [2024-11-23 22:55:53,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:55:53,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 22:55:53,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:55:53,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 22:55:53,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 22:55:53,387 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2024-11-23 22:55:53,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 206 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2024-11-23 22:55:53,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:55:53,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2024-11-23 22:55:53,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:56:11,446 INFO L124 PetriNetUnfolderBase]: 119631/194560 cut-off events. [2024-11-23 22:56:11,446 INFO L125 PetriNetUnfolderBase]: For 11318/11318 co-relation queries the response was YES. [2024-11-23 22:56:11,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352886 conditions, 194560 events. 119631/194560 cut-off events. For 11318/11318 co-relation queries the response was YES. Maximal size of possible extension queue 4783. Compared 1839389 event pairs, 106668 based on Foata normal form. 11679/195436 useless extension candidates. Maximal degree in co-relation 60764. Up to 152889 conditions per place. [2024-11-23 22:56:13,104 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 0 changer transitions 0/76 dead transitions. [2024-11-23 22:56:13,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 266 flow [2024-11-23 22:56:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 22:56:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-23 22:56:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 122 transitions. [2024-11-23 22:56:13,116 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6853932584269663 [2024-11-23 22:56:13,118 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 206 flow. Second operand 2 states and 122 transitions. [2024-11-23 22:56:13,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 266 flow [2024-11-23 22:56:13,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 76 transitions, 260 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-23 22:56:13,154 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 174 flow [2024-11-23 22:56:13,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=174, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2024-11-23 22:56:13,161 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-11-23 22:56:13,162 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 174 flow [2024-11-23 22:56:13,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2024-11-23 22:56:13,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:56:13,162 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-23 22:56:13,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 22:56:13,163 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-23 22:56:13,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:56:13,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1104940786, now seen corresponding path program 1 times [2024-11-23 22:56:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:56:13,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592198044] [2024-11-23 22:56:13,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:56:13,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:56:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 22:56:13,467 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-23 22:56:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 22:56:13,499 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-23 22:56:13,500 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-23 22:56:13,500 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-23 22:56:13,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-23 22:56:13,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-23 22:56:13,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-23 22:56:13,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-23 22:56:13,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-23 22:56:13,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 22:56:13,501 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-23 22:56:13,502 WARN L246 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-23 22:56:13,502 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-23 22:56:13,550 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-23 22:56:13,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 110 transitions, 260 flow [2024-11-23 22:56:13,570 INFO L124 PetriNetUnfolderBase]: 15/124 cut-off events. [2024-11-23 22:56:13,571 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-23 22:56:13,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 124 events. 15/124 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 411 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 118. Up to 6 conditions per place. [2024-11-23 22:56:13,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 110 transitions, 260 flow [2024-11-23 22:56:13,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 110 transitions, 260 flow [2024-11-23 22:56:13,575 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:56:13,575 INFO L333 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, 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;@425a1821, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:56:13,576 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-23 22:56:13,583 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 22:56:13,584 INFO L124 PetriNetUnfolderBase]: 2/51 cut-off events. [2024-11-23 22:56:13,584 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-23 22:56:13,584 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:56:13,584 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:56:13,584 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-23 22:56:13,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:56:13,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2073074917, now seen corresponding path program 1 times [2024-11-23 22:56:13,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:56:13,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869863288] [2024-11-23 22:56:13,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:56:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:56:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:56:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:56:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:56:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869863288] [2024-11-23 22:56:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869863288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:56:13,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:56:13,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:56:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695363565] [2024-11-23 22:56:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:56:13,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 22:56:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:56:13,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 22:56:13,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 22:56:13,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 110 [2024-11-23 22:56:13,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 110 transitions, 260 flow. Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2024-11-23 22:56:13,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:56:13,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 110 [2024-11-23 22:56:13,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand