./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_41-trylock_racefree.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_41-trylock_racefree.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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:23:21,720 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:23:21,780 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:23:21,791 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:23:21,795 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:23:21,825 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:23:21,825 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:23:21,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:23:21,826 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:23:21,826 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:23:21,827 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:23:21,827 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:23:21,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:23:21,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:23:21,828 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:23:21,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:23:21,829 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:23:21,829 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:23:21,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:23:21,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:23:21,830 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:23:21,830 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:23:21,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:23:21,831 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:23:21,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:23:21,832 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:23:21,832 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:23:21,832 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:23:21,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:23:21,833 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:23:21,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:23:21,833 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:23:21,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:23:21,834 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:23:21,834 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:23:21,834 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:23:21,834 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:23:21,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:23:21,835 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:23:21,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:23:21,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:23:21,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:23:21,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2024-10-24 12:23:22,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:23:22,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:23:22,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:23:22,098 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:23:22,099 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:23:22,100 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2024-10-24 12:23:23,414 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:23:23,660 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:23:23,660 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2024-10-24 12:23:23,676 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27f90e706/7f5ac26c975e4748a82cb1c8d142cdc2/FLAGc17d44e41 [2024-10-24 12:23:23,694 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27f90e706/7f5ac26c975e4748a82cb1c8d142cdc2 [2024-10-24 12:23:23,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:23:23,699 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:23:23,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:23:23,706 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:23:23,712 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:23:23,713 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:23:23" (1/1) ... [2024-10-24 12:23:23,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a2dad24 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 12:23:23,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:23:23" (1/1) ... [2024-10-24 12:23:23,752 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:23:24,037 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_41-trylock_racefree.i[30176,30189] [2024-10-24 12:23:24,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:23:24,071 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:23:24,143 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_41-trylock_racefree.i[30176,30189] [2024-10-24 12:23:24,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:23:24,209 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:23:24,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:24 WrapperNode [2024-10-24 12:23:24,210 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:23:24,211 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:23:24,211 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:23:24,211 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:23:24,217 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 12:23:24,233 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 12:23:24,254 INFO L138 Inliner]: procedures = 172, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2024-10-24 12:23:24,255 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:23:24,256 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:23:24,256 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:23:24,256 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:23:24,265 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 12:23:24,265 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 12:23:24,268 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 12:23:24,278 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-10-24 12:23:24,279 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 12:23:24,279 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 12:23:24,283 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 12:23:24,287 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 12:23:24,288 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 12:23:24,289 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 12:23:24,291 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:23:24,292 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:23:24,292 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:23:24,292 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:23:24,296 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 12:23:24,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:23:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:23:24,332 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 12:23:24,335 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 12:23:24,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:23:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:23:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 12:23:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 12:23:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:23:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:23:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 12:23:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 12:23:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 12:23:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:23:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 12:23:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 12:23:24,385 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 12:23:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 12:23:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2024-10-24 12:23:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:23:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:23:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 12:23:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 12:23:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 12:23:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:23:24,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:23:24,388 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 12:23:24,508 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:23:24,510 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:23:24,676 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:23:24,676 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:23:24,798 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:23:24,799 INFO L314 CfgBuilder]: Removed 11 assume(true) statements. [2024-10-24 12:23:24,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:23:24 BoogieIcfgContainer [2024-10-24 12:23:24,799 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:23:24,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:23:24,802 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:23:24,805 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:23:24,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:23:23" (1/3) ... [2024-10-24 12:23:24,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9dc4fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:23:24, skipping insertion in model container [2024-10-24 12:23:24,806 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 12:23:24,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9dc4fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:23:24, skipping insertion in model container [2024-10-24 12:23:24,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:23:24" (3/3) ... [2024-10-24 12:23:24,808 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2024-10-24 12:23:24,823 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:23:24,824 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:23:24,824 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:23:24,855 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-24 12:23:24,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 51 transitions, 109 flow [2024-10-24 12:23:24,914 INFO L124 PetriNetUnfolderBase]: 17/73 cut-off events. [2024-10-24 12:23:24,914 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:23:24,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 73 events. 17/73 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 227 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 46. Up to 6 conditions per place. [2024-10-24 12:23:24,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 51 transitions, 109 flow [2024-10-24 12:23:24,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 49 transitions, 102 flow [2024-10-24 12:23:24,928 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:24,934 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;@38b33ed1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:24,934 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:24,941 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:24,942 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-24 12:23:24,942 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:23:24,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:24,943 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-24 12:23:24,943 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:24,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:24,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1424128212, now seen corresponding path program 1 times [2024-10-24 12:23:24,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:24,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056699579] [2024-10-24 12:23:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:25,084 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:23:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:25,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:23:25,133 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:23:25,134 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-24 12:23:25,135 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-24 12:23:25,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:23:25,136 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-24 12:23:25,139 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:23:25,139 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 12:23:25,164 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 12:23:25,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 76 transitions, 168 flow [2024-10-24 12:23:25,186 INFO L124 PetriNetUnfolderBase]: 30/127 cut-off events. [2024-10-24 12:23:25,186 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-24 12:23:25,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 127 events. 30/127 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 490 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 77. Up to 9 conditions per place. [2024-10-24 12:23:25,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 76 transitions, 168 flow [2024-10-24 12:23:25,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 76 transitions, 168 flow [2024-10-24 12:23:25,190 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:25,191 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;@38b33ed1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:25,191 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:25,197 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:25,197 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-10-24 12:23:25,197 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:23:25,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:25,197 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:23:25,198 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:25,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:25,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2137658440, now seen corresponding path program 1 times [2024-10-24 12:23:25,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:25,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336483542] [2024-10-24 12:23:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:25,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:25,309 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 12:23:25,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336483542] [2024-10-24 12:23:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336483542] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:23:25,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:23:25,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:23:25,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811538881] [2024-10-24 12:23:25,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:23:25,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:23:25,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:25,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:23:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:23:25,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 76 [2024-10-24 12:23:25,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:23:25,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:25,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 76 [2024-10-24 12:23:25,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:23:25,973 INFO L124 PetriNetUnfolderBase]: 2713/5239 cut-off events. [2024-10-24 12:23:25,974 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-24 12:23:25,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9606 conditions, 5239 events. 2713/5239 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 36670 event pairs, 2430 based on Foata normal form. 1371/6139 useless extension candidates. Maximal degree in co-relation 7056. Up to 4298 conditions per place. [2024-10-24 12:23:26,002 INFO L140 encePairwiseOnDemand]: 57/76 looper letters, 38 selfloop transitions, 2 changer transitions 11/71 dead transitions. [2024-10-24 12:23:26,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 256 flow [2024-10-24 12:23:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:23:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:23:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-10-24 12:23:26,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-10-24 12:23:26,017 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 168 flow. Second operand 3 states and 138 transitions. [2024-10-24 12:23:26,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 256 flow [2024-10-24 12:23:26,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 256 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:23:26,028 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 120 flow [2024-10-24 12:23:26,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2024-10-24 12:23:26,034 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2024-10-24 12:23:26,035 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 120 flow [2024-10-24 12:23:26,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:23:26,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:26,036 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-24 12:23:26,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:23:26,037 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:26,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash -183439161, now seen corresponding path program 1 times [2024-10-24 12:23:26,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:26,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323538053] [2024-10-24 12:23:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:26,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:26,076 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:23:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:26,092 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:23:26,092 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:23:26,092 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-24 12:23:26,093 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-24 12:23:26,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:23:26,093 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-24 12:23:26,093 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:23:26,094 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 12:23:26,110 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 12:23:26,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 101 transitions, 229 flow [2024-10-24 12:23:26,165 INFO L124 PetriNetUnfolderBase]: 46/192 cut-off events. [2024-10-24 12:23:26,167 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-24 12:23:26,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 192 events. 46/192 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 812 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 138. Up to 12 conditions per place. [2024-10-24 12:23:26,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 101 transitions, 229 flow [2024-10-24 12:23:26,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 101 transitions, 229 flow [2024-10-24 12:23:26,173 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:26,175 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;@38b33ed1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:26,175 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:26,178 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:26,178 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-10-24 12:23:26,179 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:23:26,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:26,179 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:23:26,179 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:26,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash 274178765, now seen corresponding path program 1 times [2024-10-24 12:23:26,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:26,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623850392] [2024-10-24 12:23:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:26,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:26,257 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 12:23:26,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:26,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623850392] [2024-10-24 12:23:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623850392] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:23:26,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:23:26,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:23:26,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357356225] [2024-10-24 12:23:26,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:23:26,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:23:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:26,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:23:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:23:26,259 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 101 [2024-10-24 12:23:26,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:23:26,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:26,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 101 [2024-10-24 12:23:26,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:23:31,479 INFO L124 PetriNetUnfolderBase]: 42400/68728 cut-off events. [2024-10-24 12:23:31,483 INFO L125 PetriNetUnfolderBase]: For 1141/1141 co-relation queries the response was YES. [2024-10-24 12:23:31,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128464 conditions, 68728 events. 42400/68728 cut-off events. For 1141/1141 co-relation queries the response was YES. Maximal size of possible extension queue 1716. Compared 583562 event pairs, 41149 based on Foata normal form. 20138/83678 useless extension candidates. Maximal degree in co-relation 74950. Up to 58925 conditions per place. [2024-10-24 12:23:31,815 INFO L140 encePairwiseOnDemand]: 76/101 looper letters, 48 selfloop transitions, 2 changer transitions 12/90 dead transitions. [2024-10-24 12:23:31,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 327 flow [2024-10-24 12:23:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:23:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:23:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-10-24 12:23:31,820 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5907590759075908 [2024-10-24 12:23:31,821 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 229 flow. Second operand 3 states and 179 transitions. [2024-10-24 12:23:31,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 327 flow [2024-10-24 12:23:31,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 327 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:23:31,827 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 164 flow [2024-10-24 12:23:31,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-10-24 12:23:31,829 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2024-10-24 12:23:31,829 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 164 flow [2024-10-24 12:23:31,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:23:31,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:31,830 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:23:31,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:23:31,831 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:31,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash 19170239, now seen corresponding path program 1 times [2024-10-24 12:23:31,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:31,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003097959] [2024-10-24 12:23:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:31,919 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 12:23:31,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:31,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003097959] [2024-10-24 12:23:31,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003097959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:23:31,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744188739] [2024-10-24 12:23:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:31,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:23:31,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:23:31,925 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 12:23:31,927 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 12:23:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:32,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 12:23:32,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:23:32,049 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 12:23:32,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:23:32,068 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 12:23:32,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744188739] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:23:32,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:23:32,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 12:23:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103830763] [2024-10-24 12:23:32,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:23:32,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:23:32,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:23:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:23:32,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 101 [2024-10-24 12:23:32,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 32.57142857142857) internal successors, (228), 7 states have internal predecessors, (228), 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 12:23:32,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:32,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 101 [2024-10-24 12:23:32,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:23:33,061 INFO L124 PetriNetUnfolderBase]: 7668/13178 cut-off events. [2024-10-24 12:23:33,061 INFO L125 PetriNetUnfolderBase]: For 3229/3229 co-relation queries the response was YES. [2024-10-24 12:23:33,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25738 conditions, 13178 events. 7668/13178 cut-off events. For 3229/3229 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 97880 event pairs, 1790 based on Foata normal form. 1110/14134 useless extension candidates. Maximal degree in co-relation 2635. Up to 7400 conditions per place. [2024-10-24 12:23:33,136 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 88 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-10-24 12:23:33,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 446 flow [2024-10-24 12:23:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:23:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:23:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 275 transitions. [2024-10-24 12:23:33,139 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4537953795379538 [2024-10-24 12:23:33,139 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 164 flow. Second operand 6 states and 275 transitions. [2024-10-24 12:23:33,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 446 flow [2024-10-24 12:23:33,143 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 12:23:33,145 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2024-10-24 12:23:33,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, 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 12:23:33,146 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, -10 predicate places. [2024-10-24 12:23:33,146 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2024-10-24 12:23:33,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.57142857142857) internal successors, (228), 7 states have internal predecessors, (228), 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 12:23:33,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:33,146 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-24 12:23:33,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 12:23:33,350 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 12:23:33,351 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:33,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2050232717, now seen corresponding path program 1 times [2024-10-24 12:23:33,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:33,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936395939] [2024-10-24 12:23:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:33,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:33,381 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:23:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:33,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:23:33,403 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:23:33,404 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-24 12:23:33,404 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-24 12:23:33,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:23:33,405 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-24 12:23:33,405 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:23:33,405 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-24 12:23:33,433 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-24 12:23:33,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 126 transitions, 292 flow [2024-10-24 12:23:33,453 INFO L124 PetriNetUnfolderBase]: 70/281 cut-off events. [2024-10-24 12:23:33,454 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-24 12:23:33,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 281 events. 70/281 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1243 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 216. Up to 32 conditions per place. [2024-10-24 12:23:33,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 126 transitions, 292 flow [2024-10-24 12:23:33,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 126 transitions, 292 flow [2024-10-24 12:23:33,460 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:33,463 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;@38b33ed1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:33,465 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:33,468 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:33,468 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-10-24 12:23:33,468 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 12:23:33,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:33,468 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:23:33,468 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:33,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash -136958965, now seen corresponding path program 1 times [2024-10-24 12:23:33,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:33,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569950288] [2024-10-24 12:23:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:33,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:33,504 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 12:23:33,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:33,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569950288] [2024-10-24 12:23:33,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569950288] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:23:33,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:23:33,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:23:33,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751844555] [2024-10-24 12:23:33,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:23:33,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:23:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:33,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:23:33,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:23:33,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 126 [2024-10-24 12:23:33,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:23:33,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:33,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 126 [2024-10-24 12:23:33,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand