./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd --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 83bca07672f78100877a79a1440d2a8107bad3ebb200d176bee629abfa2ef706 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:11:35,801 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:11:35,911 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 16:11:35,923 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:11:35,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:11:35,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:11:35,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:11:35,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:11:35,977 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:11:35,977 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:11:35,977 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:11:35,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:11:35,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:11:35,979 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:11:35,980 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:11:35,980 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:11:35,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 16:11:35,982 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:11:35,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:11:35,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:11:35,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:11:35,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 16:11:35,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:11:35,983 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 16:11:35,983 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:11:35,983 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:11:35,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 16:11:35,984 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:11:35,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:11:35,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:11:35,984 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:11:35,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:11:35,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:11:35,984 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:11:35,984 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:11:35,985 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 16:11:35,985 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:11:35,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:11:35,985 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:11:35,985 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:11:35,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:11:35,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:11:35,987 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_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd 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 -> 83bca07672f78100877a79a1440d2a8107bad3ebb200d176bee629abfa2ef706 [2024-11-13 16:11:36,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:11:36,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:11:36,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:11:36,494 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:11:36,495 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:11:36,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/pthread-ext/14_spin2003.i Unable to find full path for "g++" [2024-11-13 16:11:39,109 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:11:39,509 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:11:39,510 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/sv-benchmarks/c/pthread-ext/14_spin2003.i [2024-11-13 16:11:39,544 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/data/df5d96228/261eafc2f7d3414fac219cfb128eb750/FLAG69131128d [2024-11-13 16:11:39,579 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/data/df5d96228/261eafc2f7d3414fac219cfb128eb750 [2024-11-13 16:11:39,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:11:39,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:11:39,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:11:39,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:11:39,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:11:39,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:11:39" (1/1) ... [2024-11-13 16:11:39,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55757399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:39, skipping insertion in model container [2024-11-13 16:11:39,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:11:39" (1/1) ... [2024-11-13 16:11:39,692 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:11:40,321 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_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/sv-benchmarks/c/pthread-ext/14_spin2003.i[30419,30432] [2024-11-13 16:11:40,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:11:40,373 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:11:40,460 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_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/sv-benchmarks/c/pthread-ext/14_spin2003.i[30419,30432] [2024-11-13 16:11:40,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:11:40,526 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:11:40,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40 WrapperNode [2024-11-13 16:11:40,530 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:11:40,532 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:11:40,533 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:11:40,533 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:11:40,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,592 INFO L138 Inliner]: procedures = 164, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2024-11-13 16:11:40,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:11:40,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:11:40,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:11:40,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:11:40,607 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,610 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,628 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-11-13 16:11:40,629 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,635 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,640 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,642 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,643 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,646 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:11:40,647 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:11:40,647 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:11:40,647 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:11:40,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (1/1) ... [2024-11-13 16:11:40,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:11:40,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:40,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:11:40,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d029ada5-b8f9-48e1-8f81-7a1a1a30857d/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:11:40,736 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-13 16:11:40,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-13 16:11:40,737 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-13 16:11:40,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:11:40,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 16:11:40,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-13 16:11:40,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:11:40,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:11:40,737 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-13 16:11:40,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:11:40,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:11:40,740 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 16:11:40,905 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:11:40,908 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:11:41,092 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 16:11:41,093 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:11:41,235 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:11:41,235 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-13 16:11:41,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:11:41 BoogieIcfgContainer [2024-11-13 16:11:41,236 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:11:41,239 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:11:41,239 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:11:41,245 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:11:41,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:11:39" (1/3) ... [2024-11-13 16:11:41,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0f8188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:11:41, skipping insertion in model container [2024-11-13 16:11:41,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:11:40" (2/3) ... [2024-11-13 16:11:41,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0f8188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:11:41, skipping insertion in model container [2024-11-13 16:11:41,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:11:41" (3/3) ... [2024-11-13 16:11:41,249 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2024-11-13 16:11:41,267 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:11:41,269 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG 14_spin2003.i that has 2 procedures, 13 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-13 16:11:41,269 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 16:11:41,317 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-13 16:11:41,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 16 places, 14 transitions, 32 flow [2024-11-13 16:11:41,431 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-11-13 16:11:41,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 16:11:41,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 16 events. 1/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-13 16:11:41,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 14 transitions, 32 flow [2024-11-13 16:11:41,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 14 transitions, 32 flow [2024-11-13 16:11:41,456 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:11:41,478 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;@40f0be44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:11:41,482 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-13 16:11:41,494 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:11:41,494 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-11-13 16:11:41,494 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 16:11:41,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:11:41,495 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 16:11:41,496 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:11:41,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:41,503 INFO L85 PathProgramCache]: Analyzing trace with hash 130782113, now seen corresponding path program 1 times [2024-11-13 16:11:41,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:41,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173616938] [2024-11-13 16:11:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:41,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:41,700 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 16:11:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:41,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 16:11:41,774 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 16:11:41,775 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-13 16:11:41,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-13 16:11:41,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-13 16:11:41,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 16:11:41,780 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-13 16:11:41,793 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-13 16:11:41,793 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-13 16:11:41,831 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-13 16:11:41,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 58 flow [2024-11-13 16:11:41,857 INFO L124 PetriNetUnfolderBase]: 2/28 cut-off events. [2024-11-13 16:11:41,858 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 16:11:41,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 28 events. 2/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 48 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 20. Up to 3 conditions per place. [2024-11-13 16:11:41,859 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 58 flow [2024-11-13 16:11:41,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 58 flow [2024-11-13 16:11:41,865 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:11:41,865 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;@40f0be44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:11:41,866 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-13 16:11:41,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:11:41,875 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2024-11-13 16:11:41,875 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 16:11:41,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:11:41,875 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-11-13 16:11:41,875 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)] === [2024-11-13 16:11:41,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1671139553, now seen corresponding path program 1 times [2024-11-13 16:11:41,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:41,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928048657] [2024-11-13 16:11:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:41,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:41,925 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 16:11:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:41,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 16:11:41,964 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 16:11:41,965 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-13 16:11:41,965 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-13 16:11:41,965 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-13 16:11:41,965 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-13 16:11:41,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 16:11:41,965 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-13 16:11:41,966 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-13 16:11:41,966 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-13 16:11:41,991 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-13 16:11:41,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 34 transitions, 86 flow [2024-11-13 16:11:42,019 INFO L124 PetriNetUnfolderBase]: 3/40 cut-off events. [2024-11-13 16:11:42,019 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-13 16:11:42,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 40 events. 3/40 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 98 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 34. Up to 4 conditions per place. [2024-11-13 16:11:42,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 34 transitions, 86 flow [2024-11-13 16:11:42,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 86 flow [2024-11-13 16:11:42,027 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:11:42,031 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;@40f0be44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:11:42,031 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-13 16:11:42,049 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:11:42,049 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-11-13 16:11:42,050 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-13 16:11:42,050 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:11:42,050 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:11:42,050 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-13 16:11:42,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash 775455058, now seen corresponding path program 1 times [2024-11-13 16:11:42,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:42,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924110500] [2024-11-13 16:11:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:42,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:11:42,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:42,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924110500] [2024-11-13 16:11:42,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924110500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:11:42,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:11:42,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:11:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174111255] [2024-11-13 16:11:42,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:11:42,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:11:42,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:42,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:11:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:11:42,432 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-13 16:11:42,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-13 16:11:42,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:11:42,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-13 16:11:42,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:11:42,819 INFO L124 PetriNetUnfolderBase]: 564/973 cut-off events. [2024-11-13 16:11:42,819 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-11-13 16:11:42,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 973 events. 564/973 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4936 event pairs, 564 based on Foata normal form. 172/1132 useless extension candidates. Maximal degree in co-relation 425. Up to 876 conditions per place. [2024-11-13 16:11:42,843 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 16 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2024-11-13 16:11:42,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 100 flow [2024-11-13 16:11:42,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:11:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:11:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-11-13 16:11:42,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 16:11:42,871 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 86 flow. Second operand 3 states and 51 transitions. [2024-11-13 16:11:42,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 100 flow [2024-11-13 16:11:42,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 98 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-13 16:11:42,885 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 66 flow [2024-11-13 16:11:42,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2024-11-13 16:11:42,896 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-13 16:11:42,896 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 66 flow [2024-11-13 16:11:42,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-13 16:11:42,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:11:42,901 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-11-13 16:11:42,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 16:11:42,901 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-13 16:11:42,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2028441026, now seen corresponding path program 1 times [2024-11-13 16:11:42,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:42,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3869944] [2024-11-13 16:11:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:42,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:42,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 16:11:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:43,037 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 16:11:43,037 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 16:11:43,037 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-13 16:11:43,037 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-13 16:11:43,037 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-13 16:11:43,038 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-13 16:11:43,038 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-13 16:11:43,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 16:11:43,038 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-13 16:11:43,039 WARN L247 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-13 16:11:43,039 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-13 16:11:43,080 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-13 16:11:43,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 44 transitions, 116 flow [2024-11-13 16:11:43,095 INFO L124 PetriNetUnfolderBase]: 4/52 cut-off events. [2024-11-13 16:11:43,095 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-13 16:11:43,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 52 events. 4/52 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 132 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 51. Up to 5 conditions per place. [2024-11-13 16:11:43,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 44 transitions, 116 flow [2024-11-13 16:11:43,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 44 transitions, 116 flow [2024-11-13 16:11:43,098 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:11:43,099 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;@40f0be44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:11:43,099 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-13 16:11:43,105 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:11:43,105 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-11-13 16:11:43,105 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-13 16:11:43,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:11:43,106 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:11:43,106 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-13 16:11:43,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:43,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2113077938, now seen corresponding path program 1 times [2024-11-13 16:11:43,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:43,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831399745] [2024-11-13 16:11:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:43,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:11:43,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:43,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831399745] [2024-11-13 16:11:43,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831399745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:11:43,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:11:43,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:11:43,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395294365] [2024-11-13 16:11:43,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:11:43,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:11:43,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:11:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:11:43,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 16:11:43,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-11-13 16:11:43,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:11:43,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 16:11:43,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:11:44,371 INFO L124 PetriNetUnfolderBase]: 4064/6083 cut-off events. [2024-11-13 16:11:44,372 INFO L125 PetriNetUnfolderBase]: For 1719/1719 co-relation queries the response was YES. [2024-11-13 16:11:44,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12457 conditions, 6083 events. 4064/6083 cut-off events. For 1719/1719 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35232 event pairs, 4064 based on Foata normal form. 1172/7194 useless extension candidates. Maximal degree in co-relation 1995. Up to 5626 conditions per place. [2024-11-13 16:11:44,440 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 21 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-11-13 16:11:44,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 134 flow [2024-11-13 16:11:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:11:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:11:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-13 16:11:44,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 16:11:44,442 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 116 flow. Second operand 3 states and 66 transitions. [2024-11-13 16:11:44,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 134 flow [2024-11-13 16:11:44,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 31 transitions, 128 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-13 16:11:44,448 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 86 flow [2024-11-13 16:11:44,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2024-11-13 16:11:44,450 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2024-11-13 16:11:44,450 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 86 flow [2024-11-13 16:11:44,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-11-13 16:11:44,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:11:44,450 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2024-11-13 16:11:44,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 16:11:44,451 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)] === [2024-11-13 16:11:44,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:44,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2058287880, now seen corresponding path program 1 times [2024-11-13 16:11:44,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:44,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413193296] [2024-11-13 16:11:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:44,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:44,500 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 16:11:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:44,523 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 16:11:44,523 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 16:11:44,523 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-13 16:11:44,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-13 16:11:44,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-13 16:11:44,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-13 16:11:44,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-13 16:11:44,525 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-13 16:11:44,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 16:11:44,525 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-13 16:11:44,526 WARN L247 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-13 16:11:44,526 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-13 16:11:44,586 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-13 16:11:44,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 54 transitions, 148 flow [2024-11-13 16:11:44,608 INFO L124 PetriNetUnfolderBase]: 5/64 cut-off events. [2024-11-13 16:11:44,608 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-13 16:11:44,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 64 events. 5/64 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 183 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2024-11-13 16:11:44,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 54 transitions, 148 flow [2024-11-13 16:11:44,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 54 transitions, 148 flow [2024-11-13 16:11:44,613 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:11:44,614 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;@40f0be44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:11:44,617 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-13 16:11:44,623 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:11:44,627 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-11-13 16:11:44,627 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 16:11:44,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:11:44,628 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:11:44,628 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-13 16:11:44,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -32273024, now seen corresponding path program 1 times [2024-11-13 16:11:44,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:44,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776162833] [2024-11-13 16:11:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:44,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:11:44,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:44,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776162833] [2024-11-13 16:11:44,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776162833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:11:44,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:11:44,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:11:44,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095059547] [2024-11-13 16:11:44,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:11:44,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:11:44,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:11:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:11:44,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-13 16:11:44,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-11-13 16:11:44,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:11:44,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-13 16:11:44,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:11:51,008 INFO L124 PetriNetUnfolderBase]: 26564/36649 cut-off events. [2024-11-13 16:11:51,008 INFO L125 PetriNetUnfolderBase]: For 13590/13590 co-relation queries the response was YES. [2024-11-13 16:11:51,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75524 conditions, 36649 events. 26564/36649 cut-off events. For 13590/13590 co-relation queries the response was YES. Maximal size of possible extension queue 1322. Compared 230359 event pairs, 26564 based on Foata normal form. 7422/43770 useless extension candidates. Maximal degree in co-relation 12605. Up to 34376 conditions per place. [2024-11-13 16:11:51,319 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 26 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2024-11-13 16:11:51,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 170 flow [2024-11-13 16:11:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:11:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:11:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-11-13 16:11:51,325 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 16:11:51,325 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 148 flow. Second operand 3 states and 81 transitions. [2024-11-13 16:11:51,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 170 flow [2024-11-13 16:11:51,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 158 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-13 16:11:51,347 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 106 flow [2024-11-13 16:11:51,348 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2024-11-13 16:11:51,350 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-13 16:11:51,350 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 106 flow [2024-11-13 16:11:51,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-11-13 16:11:51,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:11:51,351 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:11:51,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 16:11:51,352 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-13 16:11:51,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:51,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1522288207, now seen corresponding path program 1 times [2024-11-13 16:11:51,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:51,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279300843] [2024-11-13 16:11:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:51,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:51,395 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 16:11:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:11:51,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 16:11:51,439 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 16:11:51,440 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-13 16:11:51,440 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-11-13 16:11:51,440 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-13 16:11:51,440 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-13 16:11:51,440 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-13 16:11:51,441 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-13 16:11:51,441 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-13 16:11:51,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 16:11:51,441 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-13 16:11:51,442 WARN L247 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-13 16:11:51,442 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-11-13 16:11:51,493 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-13 16:11:51,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 182 flow [2024-11-13 16:11:51,512 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2024-11-13 16:11:51,513 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-13 16:11:51,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 76 events. 6/76 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 220 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 88. Up to 7 conditions per place. [2024-11-13 16:11:51,514 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 182 flow [2024-11-13 16:11:51,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 64 transitions, 182 flow [2024-11-13 16:11:51,518 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:11:51,519 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;@40f0be44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:11:51,521 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-13 16:11:51,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:11:51,525 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-11-13 16:11:51,525 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 16:11:51,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:11:51,525 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:11:51,525 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-11-13 16:11:51,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:51,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1339864297, now seen corresponding path program 1 times [2024-11-13 16:11:51,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:51,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726718078] [2024-11-13 16:11:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:51,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:11:51,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:51,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726718078] [2024-11-13 16:11:51,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726718078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:11:51,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:11:51,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:11:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779679945] [2024-11-13 16:11:51,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:11:51,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:11:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:11:51,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:11:51,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-13 16:11:51,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-11-13 16:11:51,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:11:51,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-13 16:11:51,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:12:12,851 INFO L124 PetriNetUnfolderBase]: 164064/214479 cut-off events. [2024-11-13 16:12:12,851 INFO L125 PetriNetUnfolderBase]: For 98095/98095 co-relation queries the response was YES. [2024-11-13 16:12:13,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443980 conditions, 214479 events. 164064/214479 cut-off events. For 98095/98095 co-relation queries the response was YES. Maximal size of possible extension queue 6190. Compared 1414633 event pairs, 164064 based on Foata normal form. 44922/257900 useless extension candidates. Maximal degree in co-relation 76296. Up to 203126 conditions per place. [2024-11-13 16:12:14,820 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 31 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2024-11-13 16:12:14,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 208 flow [2024-11-13 16:12:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:12:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:12:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-13 16:12:14,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 16:12:14,823 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 182 flow. Second operand 3 states and 96 transitions. [2024-11-13 16:12:14,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 208 flow [2024-11-13 16:12:14,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 45 transitions, 188 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-11-13 16:12:14,898 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 126 flow [2024-11-13 16:12:14,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2024-11-13 16:12:14,900 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2024-11-13 16:12:14,900 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 126 flow [2024-11-13 16:12:14,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-11-13 16:12:14,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:12:14,901 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:12:14,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 16:12:14,901 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-11-13 16:12:14,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:12:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash -918985853, now seen corresponding path program 1 times [2024-11-13 16:12:14,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:12:14,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113112315] [2024-11-13 16:12:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:14,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:12:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:12:14,927 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 16:12:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 16:12:14,968 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 16:12:14,969 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 16:12:14,969 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-13 16:12:14,969 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-11-13 16:12:14,969 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2024-11-13 16:12:14,969 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-11-13 16:12:14,970 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-11-13 16:12:14,970 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-11-13 16:12:14,970 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-11-13 16:12:14,970 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-11-13 16:12:14,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 16:12:14,971 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-13 16:12:14,971 WARN L247 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-13 16:12:14,972 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2024-11-13 16:12:15,027 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-13 16:12:15,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 218 flow [2024-11-13 16:12:15,042 INFO L124 PetriNetUnfolderBase]: 7/88 cut-off events. [2024-11-13 16:12:15,042 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-13 16:12:15,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 88 events. 7/88 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 264 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 108. Up to 8 conditions per place. [2024-11-13 16:12:15,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 74 transitions, 218 flow [2024-11-13 16:12:15,045 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 74 transitions, 218 flow [2024-11-13 16:12:15,046 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:12:15,050 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;@40f0be44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:12:15,050 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-13 16:12:15,052 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:12:15,053 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-11-13 16:12:15,053 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 16:12:15,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:12:15,053 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:12:15,053 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-11-13 16:12:15,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:12:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1792518391, now seen corresponding path program 1 times [2024-11-13 16:12:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:12:15,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64230452] [2024-11-13 16:12:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:15,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:12:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:12:15,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:12:15,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64230452] [2024-11-13 16:12:15,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64230452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:12:15,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:12:15,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:12:15,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853201890] [2024-11-13 16:12:15,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:12:15,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:12:15,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:12:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:12:15,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:12:15,172 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 74 [2024-11-13 16:12:15,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-11-13 16:12:15,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:12:15,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 74 [2024-11-13 16:12:15,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand