./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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/goblint-regression/28-race_reach_37-indirect_racing.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 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:23:21,392 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:23:21,470 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:23:21,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:23:21,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:23:21,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:23:21,512 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:23:21,513 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:23:21,514 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:23:21,515 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:23:21,515 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:23:21,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:23:21,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:23:21,517 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:23:21,518 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:23:21,519 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:23:21,519 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:23:21,519 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:23:21,520 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:23:21,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:23:21,525 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:23:21,526 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:23:21,527 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:23:21,527 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:23:21,527 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:23:21,527 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:23:21,527 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:23:21,528 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:23:21,528 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:23:21,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:23:21,529 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:23:21,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:23:21,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:23:21,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:23:21,529 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:23:21,530 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:23:21,530 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:23:21,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:23:21,533 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:23:21,533 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:23:21,533 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:23:21,533 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:23:21,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 [2024-10-24 12:23:21,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:23:21,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:23:21,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:23:21,855 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:23:21,855 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:23:21,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2024-10-24 12:23:23,413 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:23:23,676 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:23:23,679 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2024-10-24 12:23:23,693 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc2614f7/e714a6aa8c194129965277c9be344059/FLAGc160cb4a5 [2024-10-24 12:23:23,707 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc2614f7/e714a6aa8c194129965277c9be344059 [2024-10-24 12:23:23,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:23:23,711 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:23:23,712 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:23:23,712 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:23:23,717 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:23:23,718 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:23:23" (1/1) ... [2024-10-24 12:23:23,719 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414102a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:23, skipping insertion in model container [2024-10-24 12:23:23,719 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:23:23" (1/1) ... [2024-10-24 12:23:23,775 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:23:24,158 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/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2024-10-24 12:23:24,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:23:24,202 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:23:24,241 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/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2024-10-24 12:23:24,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:23:24,325 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:23:24,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24 WrapperNode [2024-10-24 12:23:24,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:23:24,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:23:24,328 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:23:24,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:23:24,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,353 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,381 INFO L138 Inliner]: procedures = 171, calls = 40, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2024-10-24 12:23:24,382 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:23:24,383 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:23:24,383 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:23:24,383 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:23:24,394 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,397 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,417 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 6, 5, 2]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5, 0]. The 3 writes are split as follows [0, 0, 2, 0, 1]. [2024-10-24 12:23:24,417 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,426 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,429 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,435 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:23:24,441 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:23:24,441 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:23:24,441 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:23:24,442 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (1/1) ... [2024-10-24 12:23:24,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:23:24,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:23:24,490 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) [2024-10-24 12:23:24,494 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 [2024-10-24 12:23:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:23:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:23:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 12:23:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 12:23:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-24 12:23:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:23:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:23:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 12:23:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 12:23:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-24 12:23:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 12:23:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:23:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 12:23:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 12:23:24,553 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 12:23:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 12:23:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:23:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:23:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 12:23:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 12:23:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-24 12:23:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 12:23:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:23:24,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:23:24,558 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:23:24,733 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:23:24,736 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:23:24,981 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:23:24,982 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:23:25,173 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:23:25,173 INFO L314 CfgBuilder]: Removed 10 assume(true) statements. [2024-10-24 12:23:25,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:23:25 BoogieIcfgContainer [2024-10-24 12:23:25,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:23:25,178 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:23:25,178 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:23:25,182 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:23:25,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:23:23" (1/3) ... [2024-10-24 12:23:25,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f94df62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:23:25, skipping insertion in model container [2024-10-24 12:23:25,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24" (2/3) ... [2024-10-24 12:23:25,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f94df62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:23:25, skipping insertion in model container [2024-10-24 12:23:25,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:23:25" (3/3) ... [2024-10-24 12:23:25,185 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2024-10-24 12:23:25,202 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:23:25,203 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:23:25,203 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:23:25,252 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-24 12:23:25,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 46 transitions, 99 flow [2024-10-24 12:23:25,345 INFO L124 PetriNetUnfolderBase]: 13/63 cut-off events. [2024-10-24 12:23:25,345 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:23:25,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 63 events. 13/63 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 189 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2024-10-24 12:23:25,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 46 transitions, 99 flow [2024-10-24 12:23:25,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 44 transitions, 92 flow [2024-10-24 12:23:25,373 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:25,384 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;@434006c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:25,384 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:25,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:25,397 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-24 12:23:25,397 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:23:25,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:25,399 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-24 12:23:25,399 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:25,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:25,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1242857347, now seen corresponding path program 1 times [2024-10-24 12:23:25,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:25,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400288275] [2024-10-24 12:23:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:25,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:25,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:23:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:25,644 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:23:25,647 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:23:25,648 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-24 12:23:25,650 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-24 12:23:25,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:23:25,651 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-24 12:23:25,655 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:23:25,657 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 12:23:25,688 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 12:23:25,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 71 transitions, 158 flow [2024-10-24 12:23:25,730 INFO L124 PetriNetUnfolderBase]: 24/112 cut-off events. [2024-10-24 12:23:25,732 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2024-10-24 12:23:25,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 112 events. 24/112 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 434 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2024-10-24 12:23:25,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 71 transitions, 158 flow [2024-10-24 12:23:25,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 71 transitions, 158 flow [2024-10-24 12:23:25,738 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:25,742 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;@434006c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:25,742 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:25,752 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:25,752 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-10-24 12:23:25,753 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:23:25,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:25,753 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 12:23:25,753 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:25,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash -952723668, now seen corresponding path program 1 times [2024-10-24 12:23:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338328582] [2024-10-24 12:23:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:25,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:25,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:25,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338328582] [2024-10-24 12:23:25,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338328582] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:23:25,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:23:25,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:23:25,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371973811] [2024-10-24 12:23:25,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:23:25,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:23:25,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:25,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:23:25,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:23:25,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 71 [2024-10-24 12:23:25,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 71 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-10-24 12:23:25,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:25,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 71 [2024-10-24 12:23:25,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:23:26,715 INFO L124 PetriNetUnfolderBase]: 1858/3805 cut-off events. [2024-10-24 12:23:26,716 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-24 12:23:26,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6883 conditions, 3805 events. 1858/3805 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 27388 event pairs, 1723 based on Foata normal form. 1056/4534 useless extension candidates. Maximal degree in co-relation 5002. Up to 3009 conditions per place. [2024-10-24 12:23:26,750 INFO L140 encePairwiseOnDemand]: 53/71 looper letters, 35 selfloop transitions, 2 changer transitions 10/67 dead transitions. [2024-10-24 12:23:26,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 238 flow [2024-10-24 12:23:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:23:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:23:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-10-24 12:23:26,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6338028169014085 [2024-10-24 12:23:26,768 INFO L175 Difference]: Start difference. First operand has 59 places, 71 transitions, 158 flow. Second operand 3 states and 135 transitions. [2024-10-24 12:23:26,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 238 flow [2024-10-24 12:23:26,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 67 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:23:26,781 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 114 flow [2024-10-24 12:23:26,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2024-10-24 12:23:26,790 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2024-10-24 12:23:26,791 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 114 flow [2024-10-24 12:23:26,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-10-24 12:23:26,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:26,793 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-24 12:23:26,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:23:26,793 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:26,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:26,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1617157474, now seen corresponding path program 1 times [2024-10-24 12:23:26,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:26,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073759157] [2024-10-24 12:23:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:26,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:26,843 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:23:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:26,877 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:23:26,877 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:23:26,878 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-24 12:23:26,878 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-24 12:23:26,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:23:26,878 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-24 12:23:26,879 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:23:26,879 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 12:23:26,913 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 12:23:26,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 96 transitions, 219 flow [2024-10-24 12:23:26,936 INFO L124 PetriNetUnfolderBase]: 38/172 cut-off events. [2024-10-24 12:23:26,936 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2024-10-24 12:23:26,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 172 events. 38/172 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 723 event pairs, 1 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 123. Up to 12 conditions per place. [2024-10-24 12:23:26,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 96 transitions, 219 flow [2024-10-24 12:23:26,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 96 transitions, 219 flow [2024-10-24 12:23:26,944 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:26,946 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;@434006c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:26,946 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:26,950 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:26,951 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-10-24 12:23:26,951 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:23:26,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:26,951 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 12:23:26,951 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:26,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1887288108, now seen corresponding path program 1 times [2024-10-24 12:23:26,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:26,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218668023] [2024-10-24 12:23:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:27,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:27,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218668023] [2024-10-24 12:23:27,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218668023] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:23:27,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:23:27,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:23:27,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291096909] [2024-10-24 12:23:27,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:23:27,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:23:27,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:27,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:23:27,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:23:27,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-10-24 12:23:27,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 96 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2024-10-24 12:23:27,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:27,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-10-24 12:23:27,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:23:32,691 INFO L124 PetriNetUnfolderBase]: 29927/49891 cut-off events. [2024-10-24 12:23:32,692 INFO L125 PetriNetUnfolderBase]: For 1369/1369 co-relation queries the response was YES. [2024-10-24 12:23:32,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92784 conditions, 49891 events. 29927/49891 cut-off events. For 1369/1369 co-relation queries the response was YES. Maximal size of possible extension queue 1476. Compared 435637 event pairs, 19222 based on Foata normal form. 15616/61952 useless extension candidates. Maximal degree in co-relation 7041. Up to 42082 conditions per place. [2024-10-24 12:23:33,133 INFO L140 encePairwiseOnDemand]: 72/96 looper letters, 45 selfloop transitions, 2 changer transitions 11/86 dead transitions. [2024-10-24 12:23:33,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 86 transitions, 309 flow [2024-10-24 12:23:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:23:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:23:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2024-10-24 12:23:33,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-10-24 12:23:33,136 INFO L175 Difference]: Start difference. First operand has 79 places, 96 transitions, 219 flow. Second operand 3 states and 176 transitions. [2024-10-24 12:23:33,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 86 transitions, 309 flow [2024-10-24 12:23:33,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 309 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:23:33,142 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 158 flow [2024-10-24 12:23:33,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2024-10-24 12:23:33,144 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2024-10-24 12:23:33,145 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 158 flow [2024-10-24 12:23:33,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2024-10-24 12:23:33,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:33,145 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:23:33,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:23:33,146 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:33,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:33,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1843954143, now seen corresponding path program 1 times [2024-10-24 12:23:33,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:33,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827302029] [2024-10-24 12:23:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:33,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:33,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:33,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827302029] [2024-10-24 12:23:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827302029] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:23:33,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932925519] [2024-10-24 12:23:33,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:33,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:23:33,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:23:33,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:23:33,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:23:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:33,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 12:23:33,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:23:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:33,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:23:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:33,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932925519] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:23:33,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:23:33,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 12:23:33,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129683223] [2024-10-24 12:23:33,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:23:33,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:23:33,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:23:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:23:33,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-10-24 12:23:33,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 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) [2024-10-24 12:23:33,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:33,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-10-24 12:23:33,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:23:34,931 INFO L124 PetriNetUnfolderBase]: 7668/13138 cut-off events. [2024-10-24 12:23:34,931 INFO L125 PetriNetUnfolderBase]: For 3159/3159 co-relation queries the response was YES. [2024-10-24 12:23:34,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25698 conditions, 13138 events. 7668/13138 cut-off events. For 3159/3159 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 97528 event pairs, 1680 based on Foata normal form. 1110/14094 useless extension candidates. Maximal degree in co-relation 2631. Up to 7400 conditions per place. [2024-10-24 12:23:35,004 INFO L140 encePairwiseOnDemand]: 93/96 looper letters, 88 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-10-24 12:23:35,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 446 flow [2024-10-24 12:23:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:23:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:23:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 281 transitions. [2024-10-24 12:23:35,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4878472222222222 [2024-10-24 12:23:35,007 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 158 flow. Second operand 6 states and 281 transitions. [2024-10-24 12:23:35,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 446 flow [2024-10-24 12:23:35,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 442 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:23:35,012 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2024-10-24 12:23:35,012 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-10-24 12:23:35,013 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, -7 predicate places. [2024-10-24 12:23:35,013 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2024-10-24 12:23:35,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 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) [2024-10-24 12:23:35,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:35,014 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-24 12:23:35,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:23:35,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:23:35,217 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:35,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:35,219 INFO L85 PathProgramCache]: Analyzing trace with hash 261964418, now seen corresponding path program 1 times [2024-10-24 12:23:35,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:35,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272520673] [2024-10-24 12:23:35,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:35,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:35,252 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:23:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:35,283 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:23:35,284 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:23:35,284 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-24 12:23:35,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-24 12:23:35,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:23:35,285 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-24 12:23:35,286 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:23:35,286 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-24 12:23:35,315 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-24 12:23:35,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 121 transitions, 282 flow [2024-10-24 12:23:35,337 INFO L124 PetriNetUnfolderBase]: 60/256 cut-off events. [2024-10-24 12:23:35,338 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2024-10-24 12:23:35,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 256 events. 60/256 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1126 event pairs, 6 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 196. Up to 32 conditions per place. [2024-10-24 12:23:35,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 121 transitions, 282 flow [2024-10-24 12:23:35,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 121 transitions, 282 flow [2024-10-24 12:23:35,343 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:35,344 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;@434006c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:35,344 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:35,347 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:35,347 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-10-24 12:23:35,347 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:23:35,347 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:35,348 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 12:23:35,348 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:35,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:35,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1171918988, now seen corresponding path program 1 times [2024-10-24 12:23:35,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:35,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022470296] [2024-10-24 12:23:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:35,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:35,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:35,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022470296] [2024-10-24 12:23:35,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022470296] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:23:35,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:23:35,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:23:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630602861] [2024-10-24 12:23:35,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:23:35,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:23:35,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:35,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:23:35,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:23:35,381 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 121 [2024-10-24 12:23:35,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 121 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2024-10-24 12:23:35,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:35,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 121 [2024-10-24 12:23:35,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand