./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:20:23,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:20:23,198 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:20:23,202 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:20:23,202 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:20:23,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:20:23,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:20:23,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:20:23,219 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:20:23,219 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:20:23,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:20:23,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:20:23,220 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:20:23,220 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:20:23,221 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:20:23,221 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:20:23,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:20:23,222 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:20:23,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:20:23,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:20:23,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:20:23,223 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:20:23,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:20:23,224 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:20:23,224 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:20:23,224 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:20:23,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:20:23,225 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:20:23,225 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:20:23,225 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:20:23,225 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:20:23,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:20:23,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:20:23,226 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:20:23,226 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:20:23,227 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:20:23,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:20:23,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:20:23,227 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:20:23,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:20:23,228 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:20:23,228 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:20:23,228 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd [2024-10-14 14:20:23,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:20:23,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:20:23,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:20:23,484 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:20:23,485 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:20:23,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2024-10-14 14:20:24,755 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:20:24,971 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:20:24,971 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2024-10-14 14:20:24,983 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cc2863cf/0ca1827dfae74deebed9bc2e8b5041a2/FLAG2fa1b8029 [2024-10-14 14:20:24,995 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cc2863cf/0ca1827dfae74deebed9bc2e8b5041a2 [2024-10-14 14:20:24,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:20:24,998 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:20:25,000 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:20:25,000 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:20:25,008 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:20:25,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:20:24" (1/1) ... [2024-10-14 14:20:25,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@292e3f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25, skipping insertion in model container [2024-10-14 14:20:25,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:20:24" (1/1) ... [2024-10-14 14:20:25,049 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:20:25,277 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2024-10-14 14:20:25,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:20:25,298 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:20:25,338 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2024-10-14 14:20:25,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:20:25,370 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:20:25,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25 WrapperNode [2024-10-14 14:20:25,371 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:20:25,372 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:20:25,372 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:20:25,372 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:20:25,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,425 INFO L138 Inliner]: procedures = 171, calls = 23, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 123 [2024-10-14 14:20:25,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:20:25,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:20:25,428 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:20:25,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:20:25,437 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,444 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,458 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-10-14 14:20:25,458 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,458 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,467 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,473 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,474 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,483 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:20:25,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:20:25,484 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:20:25,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:20:25,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (1/1) ... [2024-10-14 14:20:25,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:20:25,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:20:25,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 14:20:25,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 14:20:25,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:20:25,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:20:25,576 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-10-14 14:20:25,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-10-14 14:20:25,576 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-14 14:20:25,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-14 14:20:25,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:20:25,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:20:25,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:20:25,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:20:25,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:20:25,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:20:25,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:20:25,579 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:20:25,708 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:20:25,710 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:20:25,895 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:20:25,895 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:20:26,076 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:20:26,077 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 14:20:26,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:20:26 BoogieIcfgContainer [2024-10-14 14:20:26,077 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:20:26,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:20:26,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:20:26,082 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:20:26,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:20:24" (1/3) ... [2024-10-14 14:20:26,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea79e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:20:26, skipping insertion in model container [2024-10-14 14:20:26,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:20:25" (2/3) ... [2024-10-14 14:20:26,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea79e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:20:26, skipping insertion in model container [2024-10-14 14:20:26,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:20:26" (3/3) ... [2024-10-14 14:20:26,084 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2024-10-14 14:20:26,098 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:20:26,098 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:20:26,098 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:20:26,129 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 14:20:26,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2024-10-14 14:20:26,177 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2024-10-14 14:20:26,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:20:26,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 3/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 58 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-10-14 14:20:26,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2024-10-14 14:20:26,186 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 28 transitions, 63 flow [2024-10-14 14:20:26,194 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:20:26,199 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;@2abbc9e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:20:26,199 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-14 14:20:26,204 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:20:26,204 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-10-14 14:20:26,204 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:20:26,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:20:26,204 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:20:26,205 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:20:26,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:20:26,210 INFO L85 PathProgramCache]: Analyzing trace with hash 438811376, now seen corresponding path program 1 times [2024-10-14 14:20:26,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:20:26,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389782813] [2024-10-14 14:20:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:20:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:20:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:20:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:20:26,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:20:26,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389782813] [2024-10-14 14:20:26,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389782813] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:20:26,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:20:26,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:20:26,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165877298] [2024-10-14 14:20:26,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:20:26,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:20:26,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:20:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:20:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:20:26,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-10-14 14:20:26,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-14 14:20:26,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:20:26,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-10-14 14:20:26,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:20:26,519 INFO L124 PetriNetUnfolderBase]: 174/297 cut-off events. [2024-10-14 14:20:26,519 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:20:26,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 297 events. 174/297 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1170 event pairs, 129 based on Foata normal form. 107/393 useless extension candidates. Maximal degree in co-relation 572. Up to 273 conditions per place. [2024-10-14 14:20:26,523 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 17 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2024-10-14 14:20:26,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 89 flow [2024-10-14 14:20:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:20:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:20:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-10-14 14:20:26,534 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-10-14 14:20:26,535 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 63 flow. Second operand 3 states and 42 transitions. [2024-10-14 14:20:26,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 89 flow [2024-10-14 14:20:26,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:20:26,564 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 54 flow [2024-10-14 14:20:26,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2024-10-14 14:20:26,568 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-10-14 14:20:26,569 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 54 flow [2024-10-14 14:20:26,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-14 14:20:26,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:20:26,570 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-14 14:20:26,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:20:26,571 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:20:26,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:20:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash 169859094, now seen corresponding path program 1 times [2024-10-14 14:20:26,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:20:26,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440494175] [2024-10-14 14:20:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:20:26,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:20:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:20:26,601 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:20:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:20:26,662 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:20:26,663 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:20:26,664 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-14 14:20:26,665 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-14 14:20:26,666 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-10-14 14:20:26,667 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-14 14:20:26,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:20:26,667 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-14 14:20:26,669 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:20:26,670 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-14 14:20:26,694 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 14:20:26,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 51 transitions, 122 flow [2024-10-14 14:20:26,713 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2024-10-14 14:20:26,714 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:20:26,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 45 events. 4/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 96 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 52. Up to 3 conditions per place. [2024-10-14 14:20:26,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 51 transitions, 122 flow [2024-10-14 14:20:26,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 40 transitions, 93 flow [2024-10-14 14:20:26,717 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:20:26,718 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;@2abbc9e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:20:26,718 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-14 14:20:26,722 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:20:26,723 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-10-14 14:20:26,723 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:20:26,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:20:26,723 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:20:26,723 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-14 14:20:26,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:20:26,724 INFO L85 PathProgramCache]: Analyzing trace with hash 577324633, now seen corresponding path program 1 times [2024-10-14 14:20:26,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:20:26,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189140193] [2024-10-14 14:20:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:20:26,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:20:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:20:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:20:26,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:20:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189140193] [2024-10-14 14:20:26,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189140193] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:20:26,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:20:26,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:20:26,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365559125] [2024-10-14 14:20:26,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:20:26,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:20:26,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:20:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:20:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:20:26,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-10-14 14:20:26,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-10-14 14:20:26,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:20:26,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-10-14 14:20:26,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:20:27,194 INFO L124 PetriNetUnfolderBase]: 3084/4310 cut-off events. [2024-10-14 14:20:27,196 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-10-14 14:20:27,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8523 conditions, 4310 events. 3084/4310 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21178 event pairs, 2505 based on Foata normal form. 1195/5295 useless extension candidates. Maximal degree in co-relation 8512. Up to 4101 conditions per place. [2024-10-14 14:20:27,231 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 28 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2024-10-14 14:20:27,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 141 flow [2024-10-14 14:20:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:20:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:20:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-10-14 14:20:27,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-14 14:20:27,234 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 93 flow. Second operand 3 states and 68 transitions. [2024-10-14 14:20:27,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 141 flow [2024-10-14 14:20:27,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:20:27,237 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 84 flow [2024-10-14 14:20:27,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-10-14 14:20:27,238 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2024-10-14 14:20:27,238 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 84 flow [2024-10-14 14:20:27,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-10-14 14:20:27,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:20:27,239 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 14:20:27,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:20:27,239 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-14 14:20:27,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:20:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash -817335401, now seen corresponding path program 1 times [2024-10-14 14:20:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:20:27,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886260777] [2024-10-14 14:20:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:20:27,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:20:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:20:27,276 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:20:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:20:27,297 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:20:27,299 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:20:27,299 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-14 14:20:27,299 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-14 14:20:27,300 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-10-14 14:20:27,300 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-14 14:20:27,300 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-14 14:20:27,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:20:27,300 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-14 14:20:27,301 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:20:27,301 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-14 14:20:27,339 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 14:20:27,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 73 transitions, 182 flow [2024-10-14 14:20:27,348 INFO L124 PetriNetUnfolderBase]: 5/60 cut-off events. [2024-10-14 14:20:27,350 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-14 14:20:27,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 60 events. 5/60 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 149 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2024-10-14 14:20:27,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 73 transitions, 182 flow [2024-10-14 14:20:27,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 52 transitions, 125 flow [2024-10-14 14:20:27,353 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:20:27,354 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;@2abbc9e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:20:27,355 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-14 14:20:27,357 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:20:27,357 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-14 14:20:27,357 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:20:27,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:20:27,358 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:20:27,358 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-14 14:20:27,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:20:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash -574492831, now seen corresponding path program 1 times [2024-10-14 14:20:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:20:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273746451] [2024-10-14 14:20:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:20:27,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:20:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:20:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:20:27,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:20:27,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273746451] [2024-10-14 14:20:27,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273746451] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:20:27,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:20:27,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:20:27,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149078459] [2024-10-14 14:20:27,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:20:27,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:20:27,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:20:27,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:20:27,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:20:27,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-14 14:20:27,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-10-14 14:20:27,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:20:27,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-14 14:20:27,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:20:31,893 INFO L124 PetriNetUnfolderBase]: 46272/59561 cut-off events. [2024-10-14 14:20:31,894 INFO L125 PetriNetUnfolderBase]: For 2522/2522 co-relation queries the response was YES. [2024-10-14 14:20:32,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118225 conditions, 59561 events. 46272/59561 cut-off events. For 2522/2522 co-relation queries the response was YES. Maximal size of possible extension queue 2078. Compared 330140 event pairs, 39531 based on Foata normal form. 13174/69258 useless extension candidates. Maximal degree in co-relation 118213. Up to 57099 conditions per place. [2024-10-14 14:20:32,255 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 39 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2024-10-14 14:20:32,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 195 flow [2024-10-14 14:20:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:20:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:20:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-10-14 14:20:32,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4292237442922374 [2024-10-14 14:20:32,257 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 125 flow. Second operand 3 states and 94 transitions. [2024-10-14 14:20:32,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 195 flow [2024-10-14 14:20:32,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 47 transitions, 192 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:20:32,263 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 114 flow [2024-10-14 14:20:32,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-10-14 14:20:32,264 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2024-10-14 14:20:32,265 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 114 flow [2024-10-14 14:20:32,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-10-14 14:20:32,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:20:32,265 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:20:32,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 14:20:32,266 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-14 14:20:32,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:20:32,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1051592257, now seen corresponding path program 1 times [2024-10-14 14:20:32,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:20:32,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991498575] [2024-10-14 14:20:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:20:32,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:20:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:20:32,279 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:20:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:20:32,290 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:20:32,290 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:20:32,291 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-10-14 14:20:32,291 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-10-14 14:20:32,291 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-10-14 14:20:32,291 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-14 14:20:32,292 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-14 14:20:32,292 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-14 14:20:32,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 14:20:32,292 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-14 14:20:32,293 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:20:32,293 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-14 14:20:32,383 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 14:20:32,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 95 transitions, 246 flow [2024-10-14 14:20:32,396 INFO L124 PetriNetUnfolderBase]: 6/75 cut-off events. [2024-10-14 14:20:32,397 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-14 14:20:32,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 75 events. 6/75 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 200 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 91. Up to 5 conditions per place. [2024-10-14 14:20:32,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 95 transitions, 246 flow [2024-10-14 14:20:32,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 159 flow [2024-10-14 14:20:32,399 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:20:32,400 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;@2abbc9e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:20:32,400 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-14 14:20:32,402 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:20:32,402 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-14 14:20:32,402 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:20:32,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:20:32,402 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:20:32,403 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:20:32,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:20:32,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1278326280, now seen corresponding path program 1 times [2024-10-14 14:20:32,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:20:32,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955328821] [2024-10-14 14:20:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:20:32,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:20:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:20:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:20:32,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:20:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955328821] [2024-10-14 14:20:32,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955328821] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:20:32,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:20:32,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:20:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543605209] [2024-10-14 14:20:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:20:32,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:20:32,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:20:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:20:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:20:32,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 95 [2024-10-14 14:20:32,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-10-14 14:20:32,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:20:32,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 95 [2024-10-14 14:20:32,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand