./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1 --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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:10:57,386 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:10:57,440 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 12:10:57,445 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:10:57,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:10:57,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:10:57,467 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:10:57,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:10:57,467 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:10:57,467 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:10:57,467 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:10:57,467 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:10:57,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:10:57,468 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:10:57,468 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:10:57,468 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:10:57,468 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 12:10:57,468 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 12:10:57,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:10:57,468 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 12:10:57,468 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:10:57,469 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:10:57,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:10:57,469 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:10:57,470 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:10:57,470 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:10:57,471 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:10:57,471 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:10:57,471 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_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1 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 -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2024-12-02 12:10:57,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:10:57,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:10:57,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:10:57,708 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:10:57,708 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:10:57,709 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-12-02 12:11:00,316 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/data/3a39c3ba0/83266ac3030f46d391a5f900806958c4/FLAG8baebfd87 [2024-12-02 12:11:00,585 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:11:00,586 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-12-02 12:11:00,599 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/data/3a39c3ba0/83266ac3030f46d391a5f900806958c4/FLAG8baebfd87 [2024-12-02 12:11:00,906 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/data/3a39c3ba0/83266ac3030f46d391a5f900806958c4 [2024-12-02 12:11:00,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:11:00,909 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:11:00,910 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:11:00,910 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:11:00,913 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:11:00,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:11:00" (1/1) ... [2024-12-02 12:11:00,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515f42d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:00, skipping insertion in model container [2024-12-02 12:11:00,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:11:00" (1/1) ... [2024-12-02 12:11:00,943 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:11:01,205 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_0df7237e-1a67-47dc-aa60-be15c8b43434/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2024-12-02 12:11:01,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:11:01,258 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:11:01,297 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_0df7237e-1a67-47dc-aa60-be15c8b43434/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2024-12-02 12:11:01,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:11:01,345 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:11:01,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01 WrapperNode [2024-12-02 12:11:01,345 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:11:01,346 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:11:01,346 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:11:01,346 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:11:01,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,360 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,377 INFO L138 Inliner]: procedures = 272, calls = 95, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 262 [2024-12-02 12:11:01,378 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:11:01,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:11:01,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:11:01,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:11:01,387 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,391 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,406 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 5, 70, 2]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 60, 0]. The 5 writes are split as follows [0, 0, 4, 1]. [2024-12-02 12:11:01,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,406 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,415 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,417 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,427 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:11:01,427 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:11:01,427 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:11:01,427 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:11:01,428 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (1/1) ... [2024-12-02 12:11:01,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:11:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:11:01,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:11:01,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:11:01,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 12:11:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-12-02 12:11:01,476 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-12-02 12:11:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 12:11:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 12:11:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 12:11:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-12-02 12:11:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:11:01,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:11:01,478 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 12:11:01,595 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:11:01,596 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:11:01,943 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 12:11:01,943 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:11:02,284 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:11:02,285 INFO L312 CfgBuilder]: Removed 15 assume(true) statements. [2024-12-02 12:11:02,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:11:02 BoogieIcfgContainer [2024-12-02 12:11:02,285 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:11:02,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:11:02,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:11:02,290 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:11:02,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:11:00" (1/3) ... [2024-12-02 12:11:02,290 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455ac048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:11:02, skipping insertion in model container [2024-12-02 12:11:02,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:11:01" (2/3) ... [2024-12-02 12:11:02,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455ac048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:11:02, skipping insertion in model container [2024-12-02 12:11:02,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:11:02" (3/3) ... [2024-12-02 12:11:02,291 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2024-12-02 12:11:02,302 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:11:02,303 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_70-funloop_racefree.i that has 2 procedures, 69 locations, 1 initial locations, 15 loop locations, and 2 error locations. [2024-12-02 12:11:02,304 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 12:11:02,340 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-12-02 12:11:02,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 97 transitions, 201 flow [2024-12-02 12:11:02,411 INFO L124 PetriNetUnfolderBase]: 41/143 cut-off events. [2024-12-02 12:11:02,413 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-12-02 12:11:02,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 41/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 535 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 90. Up to 8 conditions per place. [2024-12-02 12:11:02,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 97 transitions, 201 flow [2024-12-02 12:11:02,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 95 transitions, 194 flow [2024-12-02 12:11:02,427 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:11:02,436 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;@2a3f16c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:11:02,436 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 12:11:02,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 12:11:02,444 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2024-12-02 12:11:02,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 12:11:02,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:11:02,444 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-12-02 12:11:02,445 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-12-02 12:11:02,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:11:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash -351279333, now seen corresponding path program 1 times [2024-12-02 12:11:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:11:02,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523560471] [2024-12-02 12:11:02,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:11:02,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:11:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:11:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:02,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:11:02,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523560471] [2024-12-02 12:11:02,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523560471] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:11:02,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:11:02,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:11:02,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504192249] [2024-12-02 12:11:02,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:11:02,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:11:02,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:11:02,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:11:02,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:11:02,712 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-12-02 12:11:02,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 95 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-12-02 12:11:02,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:11:02,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-12-02 12:11:02,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:11:03,013 INFO L124 PetriNetUnfolderBase]: 483/1328 cut-off events. [2024-12-02 12:11:03,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 12:11:03,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2242 conditions, 1328 events. 483/1328 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8480 event pairs, 396 based on Foata normal form. 297/1456 useless extension candidates. Maximal degree in co-relation 2168. Up to 909 conditions per place. [2024-12-02 12:11:03,024 INFO L140 encePairwiseOnDemand]: 72/97 looper letters, 45 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-12-02 12:11:03,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 246 flow [2024-12-02 12:11:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:11:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:11:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-12-02 12:11:03,036 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5189003436426117 [2024-12-02 12:11:03,038 INFO L175 Difference]: Start difference. First operand has 71 places, 95 transitions, 194 flow. Second operand 3 states and 151 transitions. [2024-12-02 12:11:03,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 246 flow [2024-12-02 12:11:03,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 12:11:03,046 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 162 flow [2024-12-02 12:11:03,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-12-02 12:11:03,052 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2024-12-02 12:11:03,052 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 162 flow [2024-12-02 12:11:03,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-12-02 12:11:03,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:11:03,053 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-12-02 12:11:03,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 12:11:03,053 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-12-02 12:11:03,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:11:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash 327948434, now seen corresponding path program 1 times [2024-12-02 12:11:03,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:11:03,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202737456] [2024-12-02 12:11:03,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:11:03,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:11:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:11:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:03,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:11:03,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202737456] [2024-12-02 12:11:03,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202737456] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:11:03,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864553976] [2024-12-02 12:11:03,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:11:03,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:11:03,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:11:03,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:11:03,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:11:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:11:03,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 12:11:03,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:11:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:03,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:11:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:03,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864553976] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:11:03,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:11:03,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-12-02 12:11:03,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303066012] [2024-12-02 12:11:03,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:11:03,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 12:11:03,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:11:03,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 12:11:03,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:11:03,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-12-02 12:11:03,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 28.571428571428573) internal successors, (200), 7 states have internal predecessors, (200), 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) [2024-12-02 12:11:03,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:11:03,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-12-02 12:11:03,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:11:03,682 INFO L124 PetriNetUnfolderBase]: 483/1331 cut-off events. [2024-12-02 12:11:03,682 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 12:11:03,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 1331 events. 483/1331 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8487 event pairs, 396 based on Foata normal form. 0/1162 useless extension candidates. Maximal degree in co-relation 2246. Up to 909 conditions per place. [2024-12-02 12:11:03,690 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 45 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2024-12-02 12:11:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 274 flow [2024-12-02 12:11:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:11:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 12:11:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-12-02 12:11:03,693 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3694158075601375 [2024-12-02 12:11:03,693 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 162 flow. Second operand 6 states and 215 transitions. [2024-12-02 12:11:03,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 274 flow [2024-12-02 12:11:03,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 270 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 12:11:03,696 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 194 flow [2024-12-02 12:11:03,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-12-02 12:11:03,696 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 10 predicate places. [2024-12-02 12:11:03,696 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 194 flow [2024-12-02 12:11:03,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.571428571428573) internal successors, (200), 7 states have internal predecessors, (200), 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) [2024-12-02 12:11:03,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:11:03,697 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-12-02 12:11:03,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 12:11:03,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:11:03,898 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-12-02 12:11:03,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:11:03,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1095503067, now seen corresponding path program 2 times [2024-12-02 12:11:03,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:11:03,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953009877] [2024-12-02 12:11:03,898 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:11:03,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:11:03,936 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:11:03,936 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:11:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:04,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:11:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953009877] [2024-12-02 12:11:04,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953009877] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:11:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243094854] [2024-12-02 12:11:04,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:11:04,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:11:04,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:11:04,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:11:04,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:11:04,176 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:11:04,176 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:11:04,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 12:11:04,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:11:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:04,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:11:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:04,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243094854] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:11:04,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:11:04,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-12-02 12:11:04,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796495137] [2024-12-02 12:11:04,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:11:04,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 12:11:04,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:11:04,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 12:11:04,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-02 12:11:04,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-12-02 12:11:04,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 194 flow. Second operand has 13 states, 13 states have (on average 28.307692307692307) internal successors, (368), 13 states have internal predecessors, (368), 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) [2024-12-02 12:11:04,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:11:04,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-12-02 12:11:04,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:11:04,566 INFO L124 PetriNetUnfolderBase]: 483/1337 cut-off events. [2024-12-02 12:11:04,566 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-12-02 12:11:04,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 1337 events. 483/1337 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8493 event pairs, 396 based on Foata normal form. 6/1175 useless extension candidates. Maximal degree in co-relation 2237. Up to 909 conditions per place. [2024-12-02 12:11:04,572 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 45 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-12-02 12:11:04,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 342 flow [2024-12-02 12:11:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 12:11:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 12:11:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 386 transitions. [2024-12-02 12:11:04,575 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3316151202749141 [2024-12-02 12:11:04,575 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 194 flow. Second operand 12 states and 386 transitions. [2024-12-02 12:11:04,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 342 flow [2024-12-02 12:11:04,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 328 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-12-02 12:11:04,579 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 264 flow [2024-12-02 12:11:04,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=264, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2024-12-02 12:11:04,580 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 26 predicate places. [2024-12-02 12:11:04,580 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 264 flow [2024-12-02 12:11:04,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.307692307692307) internal successors, (368), 13 states have internal predecessors, (368), 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) [2024-12-02 12:11:04,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:11:04,580 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-12-02 12:11:04,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:11:04,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:11:04,781 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-12-02 12:11:04,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:11:04,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1591255419, now seen corresponding path program 3 times [2024-12-02 12:11:04,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:11:04,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514368777] [2024-12-02 12:11:04,782 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:11:04,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:11:04,839 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 12:11:04,839 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-12-02 12:11:04,839 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-12-02 12:11:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 12:11:04,880 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-12-02 12:11:04,880 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-12-02 12:11:04,881 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-12-02 12:11:04,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-12-02 12:11:04,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-12-02 12:11:04,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-12-02 12:11:04,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 12:11:04,884 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1] [2024-12-02 12:11:04,886 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-12-02 12:11:04,887 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-12-02 12:11:04,924 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 12:11:04,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 142 transitions, 300 flow [2024-12-02 12:11:04,961 INFO L124 PetriNetUnfolderBase]: 69/241 cut-off events. [2024-12-02 12:11:04,961 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-02 12:11:04,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 241 events. 69/241 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1114 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 145. Up to 12 conditions per place. [2024-12-02 12:11:04,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 142 transitions, 300 flow [2024-12-02 12:11:04,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 142 transitions, 300 flow [2024-12-02 12:11:04,967 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:11:04,967 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;@2a3f16c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:11:04,967 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-12-02 12:11:04,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 12:11:04,986 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2024-12-02 12:11:04,986 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 12:11:04,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:11:04,986 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-12-02 12:11:04,986 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-12-02 12:11:04,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:11:04,987 INFO L85 PathProgramCache]: Analyzing trace with hash 35393718, now seen corresponding path program 1 times [2024-12-02 12:11:04,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:11:04,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013780065] [2024-12-02 12:11:04,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:11:04,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:11:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:11:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:05,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:11:05,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013780065] [2024-12-02 12:11:05,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013780065] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:11:05,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:11:05,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:11:05,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525567616] [2024-12-02 12:11:05,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:11:05,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:11:05,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:11:05,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:11:05,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:11:05,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 142 [2024-12-02 12:11:05,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 142 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2024-12-02 12:11:05,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:11:05,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 142 [2024-12-02 12:11:05,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:11:07,792 INFO L124 PetriNetUnfolderBase]: 18464/36000 cut-off events. [2024-12-02 12:11:07,792 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-12-02 12:11:07,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62627 conditions, 36000 events. 18464/36000 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 336764 event pairs, 15876 based on Foata normal form. 8816/40294 useless extension candidates. Maximal degree in co-relation 50794. Up to 26524 conditions per place. [2024-12-02 12:11:07,958 INFO L140 encePairwiseOnDemand]: 106/142 looper letters, 68 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2024-12-02 12:11:07,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 110 transitions, 376 flow [2024-12-02 12:11:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:11:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:11:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-12-02 12:11:07,960 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5258215962441315 [2024-12-02 12:11:07,960 INFO L175 Difference]: Start difference. First operand has 105 places, 142 transitions, 300 flow. Second operand 3 states and 224 transitions. [2024-12-02 12:11:07,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 110 transitions, 376 flow [2024-12-02 12:11:07,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 110 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 12:11:07,963 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 246 flow [2024-12-02 12:11:07,964 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2024-12-02 12:11:07,964 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 3 predicate places. [2024-12-02 12:11:07,965 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 246 flow [2024-12-02 12:11:07,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2024-12-02 12:11:07,965 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:11:07,965 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-12-02 12:11:07,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 12:11:07,965 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-12-02 12:11:07,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:11:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash -445153555, now seen corresponding path program 1 times [2024-12-02 12:11:07,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:11:07,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761738443] [2024-12-02 12:11:07,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:11:07,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:11:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:11:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:08,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:11:08,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761738443] [2024-12-02 12:11:08,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761738443] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:11:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379692223] [2024-12-02 12:11:08,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:11:08,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:11:08,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:11:08,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:11:08,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:11:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:11:08,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 12:11:08,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:11:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:08,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:11:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:08,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379692223] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:11:08,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:11:08,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-12-02 12:11:08,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860316119] [2024-12-02 12:11:08,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:11:08,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 12:11:08,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:11:08,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 12:11:08,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:11:08,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 142 [2024-12-02 12:11:08,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 41.714285714285715) internal successors, (292), 7 states have internal predecessors, (292), 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) [2024-12-02 12:11:08,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:11:08,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 142 [2024-12-02 12:11:08,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:11:10,246 INFO L124 PetriNetUnfolderBase]: 18464/36003 cut-off events. [2024-12-02 12:11:10,246 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-12-02 12:11:10,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62643 conditions, 36003 events. 18464/36003 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 336723 event pairs, 15876 based on Foata normal form. 0/31481 useless extension candidates. Maximal degree in co-relation 62630. Up to 26524 conditions per place. [2024-12-02 12:11:10,365 INFO L140 encePairwiseOnDemand]: 139/142 looper letters, 68 selfloop transitions, 5 changer transitions 0/113 dead transitions. [2024-12-02 12:11:10,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 404 flow [2024-12-02 12:11:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:11:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 12:11:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 316 transitions. [2024-12-02 12:11:10,367 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37089201877934275 [2024-12-02 12:11:10,367 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 246 flow. Second operand 6 states and 316 transitions. [2024-12-02 12:11:10,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 404 flow [2024-12-02 12:11:10,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 113 transitions, 400 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 12:11:10,369 INFO L231 Difference]: Finished difference. Result has 115 places, 113 transitions, 278 flow [2024-12-02 12:11:10,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=115, PETRI_TRANSITIONS=113} [2024-12-02 12:11:10,370 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 10 predicate places. [2024-12-02 12:11:10,370 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 113 transitions, 278 flow [2024-12-02 12:11:10,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.714285714285715) internal successors, (292), 7 states have internal predecessors, (292), 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) [2024-12-02 12:11:10,370 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:11:10,370 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-12-02 12:11:10,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 12:11:10,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 12:11:10,571 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-12-02 12:11:10,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:11:10,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1264490890, now seen corresponding path program 2 times [2024-12-02 12:11:10,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:11:10,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309222847] [2024-12-02 12:11:10,571 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:11:10,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:11:10,593 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:11:10,593 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:11:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:10,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:11:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309222847] [2024-12-02 12:11:10,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309222847] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:11:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415267353] [2024-12-02 12:11:10,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:11:10,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:11:10,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:11:10,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:11:10,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:11:10,782 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:11:10,782 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:11:10,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 12:11:10,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:11:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:10,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:11:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:10,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415267353] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:11:10,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:11:10,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-12-02 12:11:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701403359] [2024-12-02 12:11:10,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:11:10,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 12:11:10,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:11:10,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 12:11:10,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-02 12:11:10,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 142 [2024-12-02 12:11:10,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 278 flow. Second operand has 13 states, 13 states have (on average 41.38461538461539) internal successors, (538), 13 states have internal predecessors, (538), 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) [2024-12-02 12:11:10,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:11:10,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 142 [2024-12-02 12:11:10,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:11:13,010 INFO L124 PetriNetUnfolderBase]: 18464/36009 cut-off events. [2024-12-02 12:11:13,010 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-12-02 12:11:13,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62680 conditions, 36009 events. 18464/36009 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 336807 event pairs, 15876 based on Foata normal form. 6/31494 useless extension candidates. Maximal degree in co-relation 62621. Up to 26524 conditions per place. [2024-12-02 12:11:13,152 INFO L140 encePairwiseOnDemand]: 139/142 looper letters, 68 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-12-02 12:11:13,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 119 transitions, 472 flow [2024-12-02 12:11:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 12:11:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 12:11:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 565 transitions. [2024-12-02 12:11:13,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3315727699530516 [2024-12-02 12:11:13,155 INFO L175 Difference]: Start difference. First operand has 115 places, 113 transitions, 278 flow. Second operand 12 states and 565 transitions. [2024-12-02 12:11:13,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 119 transitions, 472 flow [2024-12-02 12:11:13,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 119 transitions, 458 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-12-02 12:11:13,159 INFO L231 Difference]: Finished difference. Result has 131 places, 119 transitions, 348 flow [2024-12-02 12:11:13,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=348, PETRI_PLACES=131, PETRI_TRANSITIONS=119} [2024-12-02 12:11:13,160 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 26 predicate places. [2024-12-02 12:11:13,160 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 119 transitions, 348 flow [2024-12-02 12:11:13,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.38461538461539) internal successors, (538), 13 states have internal predecessors, (538), 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) [2024-12-02 12:11:13,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:11:13,161 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2024-12-02 12:11:13,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-12-02 12:11:13,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:11:13,362 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-12-02 12:11:13,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:11:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1389444330, now seen corresponding path program 3 times [2024-12-02 12:11:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:11:13,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085455804] [2024-12-02 12:11:13,362 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:11:13,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:11:13,403 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 12:11:13,403 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-12-02 12:11:13,403 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-12-02 12:11:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 12:11:13,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-12-02 12:11:13,425 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-12-02 12:11:13,426 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-12-02 12:11:13,426 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-12-02 12:11:13,426 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-12-02 12:11:13,426 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-12-02 12:11:13,426 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-12-02 12:11:13,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 12:11:13,426 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1] [2024-12-02 12:11:13,427 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-12-02 12:11:13,427 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-12-02 12:11:13,459 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 12:11:13,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 187 transitions, 401 flow [2024-12-02 12:11:13,489 INFO L124 PetriNetUnfolderBase]: 100/350 cut-off events. [2024-12-02 12:11:13,489 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-12-02 12:11:13,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 350 events. 100/350 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1809 event pairs, 1 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 250. Up to 16 conditions per place. [2024-12-02 12:11:13,491 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 187 transitions, 401 flow [2024-12-02 12:11:13,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 187 transitions, 401 flow [2024-12-02 12:11:13,495 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:11:13,495 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;@2a3f16c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:11:13,495 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-12-02 12:11:13,503 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 12:11:13,504 INFO L124 PetriNetUnfolderBase]: 17/104 cut-off events. [2024-12-02 12:11:13,504 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-12-02 12:11:13,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:11:13,504 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:11:13,504 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-12-02 12:11:13,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:11:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1680481306, now seen corresponding path program 1 times [2024-12-02 12:11:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:11:13,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499617693] [2024-12-02 12:11:13,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:11:13,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:11:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:11:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:11:13,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:11:13,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499617693] [2024-12-02 12:11:13,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499617693] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:11:13,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:11:13,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:11:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338513794] [2024-12-02 12:11:13,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:11:13,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:11:13,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:11:13,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:11:13,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:11:13,550 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 187 [2024-12-02 12:11:13,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2024-12-02 12:11:13,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:11:13,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 187 [2024-12-02 12:11:13,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:12:02,353 INFO L124 PetriNetUnfolderBase]: 531203/875262 cut-off events. [2024-12-02 12:12:02,354 INFO L125 PetriNetUnfolderBase]: For 5667/5667 co-relation queries the response was YES. [2024-12-02 12:12:03,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564203 conditions, 875262 events. 531203/875262 cut-off events. For 5667/5667 co-relation queries the response was YES. Maximal size of possible extension queue 20483. Compared 9787433 event pairs, 463987 based on Foata normal form. 235205/1003422 useless extension candidates. Maximal degree in co-relation 928448. Up to 686233 conditions per place. [2024-12-02 12:12:06,297 INFO L140 encePairwiseOnDemand]: 140/187 looper letters, 89 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2024-12-02 12:12:06,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 144 transitions, 497 flow [2024-12-02 12:12:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:12:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:12:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2024-12-02 12:12:06,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5258467023172906 [2024-12-02 12:12:06,299 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 401 flow. Second operand 3 states and 295 transitions. [2024-12-02 12:12:06,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 144 transitions, 497 flow [2024-12-02 12:12:06,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 144 transitions, 497 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 12:12:06,309 INFO L231 Difference]: Finished difference. Result has 141 places, 144 transitions, 325 flow [2024-12-02 12:12:06,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=141, PETRI_TRANSITIONS=144} [2024-12-02 12:12:06,310 INFO L279 CegarLoopForPetriNet]: 138 programPoint places, 3 predicate places. [2024-12-02 12:12:06,310 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 144 transitions, 325 flow [2024-12-02 12:12:06,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2024-12-02 12:12:06,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:12:06,311 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:12:06,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 12:12:06,311 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-12-02 12:12:06,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:12:06,312 INFO L85 PathProgramCache]: Analyzing trace with hash 404265164, now seen corresponding path program 1 times [2024-12-02 12:12:06,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:12:06,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874000134] [2024-12-02 12:12:06,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:12:06,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:12:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:12:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:12:06,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:12:06,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874000134] [2024-12-02 12:12:06,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874000134] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:12:06,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121256211] [2024-12-02 12:12:06,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:12:06,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:12:06,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:12:06,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:12:06,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:12:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:12:06,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 12:12:06,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:12:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:12:06,480 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:12:06,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121256211] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:12:06,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:12:06,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-12-02 12:12:06,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205142207] [2024-12-02 12:12:06,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:12:06,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:12:06,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:12:06,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:12:06,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:12:06,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 187 [2024-12-02 12:12:06,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 144 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2024-12-02 12:12:06,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:12:06,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 187 [2024-12-02 12:12:06,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:12:51,478 INFO L124 PetriNetUnfolderBase]: 531200/881692 cut-off events. [2024-12-02 12:12:51,478 INFO L125 PetriNetUnfolderBase]: For 5641/5641 co-relation queries the response was YES. [2024-12-02 12:12:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1570160 conditions, 881692 events. 531200/881692 cut-off events. For 5641/5641 co-relation queries the response was YES. Maximal size of possible extension queue 20192. Compared 9950240 event pairs, 428541 based on Foata normal form. 0/773553 useless extension candidates. Maximal degree in co-relation 1570146. Up to 685732 conditions per place. [2024-12-02 12:12:55,667 INFO L140 encePairwiseOnDemand]: 184/187 looper letters, 110 selfloop transitions, 2 changer transitions 0/165 dead transitions. [2024-12-02 12:12:55,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 165 transitions, 591 flow [2024-12-02 12:12:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:12:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:12:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2024-12-02 12:12:55,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.483065953654189 [2024-12-02 12:12:55,669 INFO L175 Difference]: Start difference. First operand has 141 places, 144 transitions, 325 flow. Second operand 3 states and 271 transitions. [2024-12-02 12:12:55,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 165 transitions, 591 flow [2024-12-02 12:12:55,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 165 transitions, 587 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 12:12:55,674 INFO L231 Difference]: Finished difference. Result has 143 places, 145 transitions, 333 flow [2024-12-02 12:12:55,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=143, PETRI_TRANSITIONS=145} [2024-12-02 12:12:55,674 INFO L279 CegarLoopForPetriNet]: 138 programPoint places, 5 predicate places. [2024-12-02 12:12:55,675 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 145 transitions, 333 flow [2024-12-02 12:12:55,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2024-12-02 12:12:55,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:12:55,675 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:12:55,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-12-02 12:12:55,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 12:12:55,875 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-12-02 12:12:55,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:12:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1603444241, now seen corresponding path program 1 times [2024-12-02 12:12:55,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:12:55,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359020382] [2024-12-02 12:12:55,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:12:55,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:12:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:12:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:12:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:12:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359020382] [2024-12-02 12:12:55,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359020382] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:12:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406690359] [2024-12-02 12:12:55,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:12:55,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:12:55,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:12:55,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:12:55,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 12:12:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:12:56,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 12:12:56,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:12:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:12:56,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:12:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:12:56,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406690359] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:12:56,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:12:56,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-12-02 12:12:56,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236327255] [2024-12-02 12:12:56,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:12:56,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 12:12:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:12:56,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 12:12:56,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:12:56,065 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 187 [2024-12-02 12:12:56,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 145 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 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) [2024-12-02 12:12:56,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:12:56,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 187 [2024-12-02 12:12:56,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:13:44,570 INFO L124 PetriNetUnfolderBase]: 531200/884736 cut-off events. [2024-12-02 12:13:44,570 INFO L125 PetriNetUnfolderBase]: For 20055/20055 co-relation queries the response was YES. [2024-12-02 12:13:46,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586925 conditions, 884736 events. 531200/884736 cut-off events. For 20055/20055 co-relation queries the response was YES. Maximal size of possible extension queue 20053. Compared 10025703 event pairs, 463987 based on Foata normal form. 3/782854 useless extension candidates. Maximal degree in co-relation 1586896. Up to 684971 conditions per place. [2024-12-02 12:13:48,893 INFO L140 encePairwiseOnDemand]: 184/187 looper letters, 90 selfloop transitions, 5 changer transitions 0/148 dead transitions. [2024-12-02 12:13:48,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 148 transitions, 535 flow [2024-12-02 12:13:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:13:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 12:13:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 415 transitions. [2024-12-02 12:13:48,896 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3698752228163993 [2024-12-02 12:13:48,896 INFO L175 Difference]: Start difference. First operand has 143 places, 145 transitions, 333 flow. Second operand 6 states and 415 transitions. [2024-12-02 12:13:48,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 148 transitions, 535 flow [2024-12-02 12:13:48,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 148 transitions, 533 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:13:48,903 INFO L231 Difference]: Finished difference. Result has 150 places, 148 transitions, 367 flow [2024-12-02 12:13:48,903 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=367, PETRI_PLACES=150, PETRI_TRANSITIONS=148} [2024-12-02 12:13:48,904 INFO L279 CegarLoopForPetriNet]: 138 programPoint places, 12 predicate places. [2024-12-02 12:13:48,904 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 148 transitions, 367 flow [2024-12-02 12:13:48,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 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) [2024-12-02 12:13:48,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:13:48,905 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-12-02 12:13:48,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 12:13:49,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 12:13:49,105 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-12-02 12:13:49,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:13:49,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1846380541, now seen corresponding path program 2 times [2024-12-02 12:13:49,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:13:49,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282849369] [2024-12-02 12:13:49,105 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:13:49,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:13:49,125 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:13:49,125 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:13:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:13:49,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:13:49,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282849369] [2024-12-02 12:13:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282849369] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:13:49,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274318920] [2024-12-02 12:13:49,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:13:49,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:13:49,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:13:49,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:13:49,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7237e-1a67-47dc-aa60-be15c8b43434/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 12:13:49,465 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:13:49,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:13:49,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 12:13:49,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:13:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:13:49,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:13:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:13:49,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274318920] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:13:49,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:13:49,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-12-02 12:13:49,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640518957] [2024-12-02 12:13:49,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:13:49,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 12:13:49,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:13:49,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 12:13:49,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-02 12:13:49,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 187 [2024-12-02 12:13:49,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 148 transitions, 367 flow. Second operand has 13 states, 13 states have (on average 54.46153846153846) internal successors, (708), 13 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:13:49,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:13:49,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 187 [2024-12-02 12:13:49,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand