./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_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_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB --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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:38:03,876 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:38:03,961 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:38:03,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:38:03,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:38:04,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:38:04,015 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:38:04,016 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:38:04,016 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:38:04,016 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:38:04,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:38:04,017 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:38:04,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:38:04,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:38:04,017 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:38:04,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:38:04,019 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:38:04,019 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:38:04,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:38:04,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:38:04,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:38:04,019 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:38:04,019 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:38:04,020 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:38:04,020 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:38:04,020 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:38:04,020 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:38:04,020 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:38:04,020 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:38:04,020 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:38:04,020 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:38:04,020 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:38:04,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:38:04,021 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:38:04,021 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:38:04,021 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:38:04,021 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:38:04,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:38:04,021 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:38:04,021 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:38:04,021 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:38:04,021 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:38:04,021 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:38:04,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:38:04,022 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:38:04,022 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:38:04,022 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:38:04,022 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:38:04,022 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_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB 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 -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2024-11-28 02:38:04,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:38:04,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:38:04,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:38:04,313 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:38:04,314 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:38:04,315 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2024-11-28 02:38:07,099 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/data/b59b8e6f1/57d4e32e034846a390a69b4be287a995/FLAG2cef67b94 [2024-11-28 02:38:07,489 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:38:07,493 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2024-11-28 02:38:07,506 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/data/b59b8e6f1/57d4e32e034846a390a69b4be287a995/FLAG2cef67b94 [2024-11-28 02:38:07,533 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/data/b59b8e6f1/57d4e32e034846a390a69b4be287a995 [2024-11-28 02:38:07,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:38:07,538 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:38:07,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:38:07,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:38:07,547 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:38:07,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:38:07" (1/1) ... [2024-11-28 02:38:07,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de815b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:07, skipping insertion in model container [2024-11-28 02:38:07,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:38:07" (1/1) ... [2024-11-28 02:38:07,600 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:38:07,904 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_6c6cc457-7739-45df-b3be-617adf72c89d/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2024-11-28 02:38:07,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:38:07,942 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:38:07,978 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_6c6cc457-7739-45df-b3be-617adf72c89d/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2024-11-28 02:38:07,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:38:08,020 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:38:08,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08 WrapperNode [2024-11-28 02:38:08,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:38:08,023 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:38:08,023 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:38:08,024 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:38:08,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,058 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,090 INFO L138 Inliner]: procedures = 172, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2024-11-28 02:38:08,090 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:38:08,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:38:08,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:38:08,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:38:08,101 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,105 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,129 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-11-28 02:38:08,130 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,130 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,139 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,144 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,152 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,162 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:38:08,167 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:38:08,167 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:38:08,167 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:38:08,168 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (1/1) ... [2024-11-28 02:38:08,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:38:08,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:38:08,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:38:08,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6cc457-7739-45df-b3be-617adf72c89d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:38:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:38:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:38:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 02:38:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 02:38:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:38:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:38:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 02:38:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 02:38:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-28 02:38:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:38:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 02:38:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-28 02:38:08,251 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-28 02:38:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:38:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2024-11-28 02:38:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:38:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:38:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 02:38:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 02:38:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-28 02:38:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:38:08,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:38:08,255 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 02:38:08,425 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:38:08,427 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:38:08,644 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:38:08,647 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:38:08,806 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:38:08,806 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-28 02:38:08,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:38:08 BoogieIcfgContainer [2024-11-28 02:38:08,807 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:38:08,810 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:38:08,810 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:38:08,815 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:38:08,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:38:07" (1/3) ... [2024-11-28 02:38:08,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a91b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:38:08, skipping insertion in model container [2024-11-28 02:38:08,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:38:08" (2/3) ... [2024-11-28 02:38:08,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a91b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:38:08, skipping insertion in model container [2024-11-28 02:38:08,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:38:08" (3/3) ... [2024-11-28 02:38:08,818 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2024-11-28 02:38:08,835 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:38:08,836 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_41-trylock_racefree.i that has 2 procedures, 39 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2024-11-28 02:38:08,837 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:38:08,911 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-28 02:38:08,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 51 transitions, 109 flow [2024-11-28 02:38:08,996 INFO L124 PetriNetUnfolderBase]: 17/73 cut-off events. [2024-11-28 02:38:08,998 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 02:38:09,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 73 events. 17/73 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 233 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 46. Up to 6 conditions per place. [2024-11-28 02:38:09,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 51 transitions, 109 flow [2024-11-28 02:38:09,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 49 transitions, 102 flow [2024-11-28 02:38:09,022 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:38:09,033 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;@7c29ea7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:38:09,033 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 02:38:09,041 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:38:09,041 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-28 02:38:09,041 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:38:09,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:38:09,042 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-28 02:38:09,042 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:38:09,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:38:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1539720211, now seen corresponding path program 1 times [2024-11-28 02:38:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:38:09,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935414128] [2024-11-28 02:38:09,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:38:09,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:38:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:38:09,177 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 02:38:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:38:09,236 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 02:38:09,238 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 02:38:09,240 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-28 02:38:09,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-28 02:38:09,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:38:09,245 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2024-11-28 02:38:09,251 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-28 02:38:09,251 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-28 02:38:09,282 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 02:38:09,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 76 transitions, 168 flow [2024-11-28 02:38:09,332 INFO L124 PetriNetUnfolderBase]: 30/127 cut-off events. [2024-11-28 02:38:09,333 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 02:38:09,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 127 events. 30/127 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 491 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 77. Up to 9 conditions per place. [2024-11-28 02:38:09,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 76 transitions, 168 flow [2024-11-28 02:38:09,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 76 transitions, 168 flow [2024-11-28 02:38:09,341 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:38:09,342 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;@7c29ea7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:38:09,344 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 02:38:09,361 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:38:09,361 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-11-28 02:38:09,361 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 02:38:09,361 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:38:09,361 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:38:09,362 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:38:09,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:38:09,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1470314371, now seen corresponding path program 1 times [2024-11-28 02:38:09,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:38:09,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688871169] [2024-11-28 02:38:09,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:38:09,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:38:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:38:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:38:09,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:38:09,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688871169] [2024-11-28 02:38:09,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688871169] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:38:09,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:38:09,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:38:09,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69238893] [2024-11-28 02:38:09,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:38:09,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:38:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:38:09,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:38:09,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:38:09,602 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 76 [2024-11-28 02:38:09,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:09,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:38:09,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 76 [2024-11-28 02:38:09,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:38:10,756 INFO L124 PetriNetUnfolderBase]: 2713/5239 cut-off events. [2024-11-28 02:38:10,756 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-28 02:38:10,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9606 conditions, 5239 events. 2713/5239 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 36687 event pairs, 2430 based on Foata normal form. 1371/6136 useless extension candidates. Maximal degree in co-relation 7056. Up to 4298 conditions per place. [2024-11-28 02:38:10,793 INFO L140 encePairwiseOnDemand]: 57/76 looper letters, 38 selfloop transitions, 2 changer transitions 11/71 dead transitions. [2024-11-28 02:38:10,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 256 flow [2024-11-28 02:38:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:38:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:38:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-11-28 02:38:10,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-11-28 02:38:10,809 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 168 flow. Second operand 3 states and 138 transitions. [2024-11-28 02:38:10,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 256 flow [2024-11-28 02:38:10,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 256 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 02:38:10,824 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 120 flow [2024-11-28 02:38:10,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2024-11-28 02:38:10,831 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2024-11-28 02:38:10,831 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 120 flow [2024-11-28 02:38:10,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:10,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:38:10,831 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-28 02:38:10,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:38:10,832 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:38:10,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:38:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1145965425, now seen corresponding path program 1 times [2024-11-28 02:38:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:38:10,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228623130] [2024-11-28 02:38:10,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:38:10,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:38:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:38:10,885 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 02:38:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:38:10,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 02:38:10,925 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 02:38:10,925 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-28 02:38:10,926 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-28 02:38:10,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:38:10,929 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-28 02:38:10,930 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-28 02:38:10,930 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-28 02:38:10,964 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 02:38:10,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 101 transitions, 229 flow [2024-11-28 02:38:11,003 INFO L124 PetriNetUnfolderBase]: 46/192 cut-off events. [2024-11-28 02:38:11,003 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-28 02:38:11,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 192 events. 46/192 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 816 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 138. Up to 12 conditions per place. [2024-11-28 02:38:11,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 101 transitions, 229 flow [2024-11-28 02:38:11,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 101 transitions, 229 flow [2024-11-28 02:38:11,010 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:38:11,012 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;@7c29ea7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:38:11,012 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 02:38:11,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:38:11,019 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-11-28 02:38:11,019 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 02:38:11,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:38:11,019 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:38:11,020 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:38:11,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:38:11,020 INFO L85 PathProgramCache]: Analyzing trace with hash -393165304, now seen corresponding path program 1 times [2024-11-28 02:38:11,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:38:11,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055052437] [2024-11-28 02:38:11,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:38:11,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:38:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:38:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:38:11,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:38:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055052437] [2024-11-28 02:38:11,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055052437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:38:11,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:38:11,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:38:11,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646397077] [2024-11-28 02:38:11,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:38:11,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:38:11,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:38:11,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:38:11,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:38:11,113 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 101 [2024-11-28 02:38:11,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:11,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:38:11,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 101 [2024-11-28 02:38:11,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:38:18,970 INFO L124 PetriNetUnfolderBase]: 42400/68728 cut-off events. [2024-11-28 02:38:18,970 INFO L125 PetriNetUnfolderBase]: For 1141/1141 co-relation queries the response was YES. [2024-11-28 02:38:19,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128464 conditions, 68728 events. 42400/68728 cut-off events. For 1141/1141 co-relation queries the response was YES. Maximal size of possible extension queue 1716. Compared 583922 event pairs, 41149 based on Foata normal form. 20138/83675 useless extension candidates. Maximal degree in co-relation 74950. Up to 58925 conditions per place. [2024-11-28 02:38:19,225 INFO L140 encePairwiseOnDemand]: 76/101 looper letters, 48 selfloop transitions, 2 changer transitions 12/90 dead transitions. [2024-11-28 02:38:19,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 327 flow [2024-11-28 02:38:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:38:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:38:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-11-28 02:38:19,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5907590759075908 [2024-11-28 02:38:19,229 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 229 flow. Second operand 3 states and 179 transitions. [2024-11-28 02:38:19,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 327 flow [2024-11-28 02:38:19,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 327 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 02:38:19,237 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 164 flow [2024-11-28 02:38:19,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-11-28 02:38:19,238 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2024-11-28 02:38:19,239 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 164 flow [2024-11-28 02:38:19,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:19,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:38:19,240 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:38:19,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 02:38:19,241 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:38:19,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:38:19,241 INFO L85 PathProgramCache]: Analyzing trace with hash -174556392, now seen corresponding path program 1 times [2024-11-28 02:38:19,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:38:19,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075025192] [2024-11-28 02:38:19,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:38:19,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:38:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:38:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:38:19,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:38:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075025192] [2024-11-28 02:38:19,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075025192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:38:19,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:38:19,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:38:19,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244823299] [2024-11-28 02:38:19,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:38:19,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:38:19,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:38:19,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:38:19,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:38:19,370 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 101 [2024-11-28 02:38:19,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:19,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:38:19,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 101 [2024-11-28 02:38:19,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:38:22,227 INFO L124 PetriNetUnfolderBase]: 23168/38018 cut-off events. [2024-11-28 02:38:22,228 INFO L125 PetriNetUnfolderBase]: For 2849/2849 co-relation queries the response was YES. [2024-11-28 02:38:22,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72678 conditions, 38018 events. 23168/38018 cut-off events. For 2849/2849 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 307743 event pairs, 13180 based on Foata normal form. 10/36274 useless extension candidates. Maximal degree in co-relation 7439. Up to 31761 conditions per place. [2024-11-28 02:38:22,404 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 67 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2024-11-28 02:38:22,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 366 flow [2024-11-28 02:38:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:38:22,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:38:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-28 02:38:22,406 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47277227722772275 [2024-11-28 02:38:22,406 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 164 flow. Second operand 4 states and 191 transitions. [2024-11-28 02:38:22,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 366 flow [2024-11-28 02:38:22,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 02:38:22,410 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 176 flow [2024-11-28 02:38:22,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2024-11-28 02:38:22,411 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, -3 predicate places. [2024-11-28 02:38:22,412 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 176 flow [2024-11-28 02:38:22,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:22,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:38:22,412 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-11-28 02:38:22,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 02:38:22,412 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:38:22,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:38:22,413 INFO L85 PathProgramCache]: Analyzing trace with hash 826474770, now seen corresponding path program 1 times [2024-11-28 02:38:22,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:38:22,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231186134] [2024-11-28 02:38:22,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:38:22,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:38:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:38:22,452 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 02:38:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:38:22,486 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 02:38:22,486 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 02:38:22,491 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-28 02:38:22,491 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-28 02:38:22,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:38:22,491 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-28 02:38:22,492 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-28 02:38:22,492 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-28 02:38:22,535 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-28 02:38:22,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 126 transitions, 292 flow [2024-11-28 02:38:22,563 INFO L124 PetriNetUnfolderBase]: 70/281 cut-off events. [2024-11-28 02:38:22,563 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-28 02:38:22,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 281 events. 70/281 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1238 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 216. Up to 32 conditions per place. [2024-11-28 02:38:22,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 126 transitions, 292 flow [2024-11-28 02:38:22,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 126 transitions, 292 flow [2024-11-28 02:38:22,571 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:38:22,572 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;@7c29ea7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:38:22,572 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 02:38:22,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:38:22,576 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-11-28 02:38:22,576 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 02:38:22,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:38:22,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:38:22,577 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:38:22,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:38:22,578 INFO L85 PathProgramCache]: Analyzing trace with hash -804303034, now seen corresponding path program 1 times [2024-11-28 02:38:22,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:38:22,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734503527] [2024-11-28 02:38:22,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:38:22,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:38:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:38:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:38:22,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:38:22,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734503527] [2024-11-28 02:38:22,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734503527] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:38:22,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:38:22,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:38:22,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224417487] [2024-11-28 02:38:22,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:38:22,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:38:22,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:38:22,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:38:22,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:38:22,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 126 [2024-11-28 02:38:22,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:22,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:38:22,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 126 [2024-11-28 02:38:22,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand