./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_08-cond_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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_08-cond_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 b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:01:54,483 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:01:54,536 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:01:54,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:01:54,544 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:01:54,573 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:01:54,574 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:01:54,575 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:01:54,576 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:01:54,577 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:01:54,577 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:01:54,577 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:01:54,578 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:01:54,578 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:01:54,580 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:01:54,580 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:01:54,581 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:01:54,581 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:01:54,581 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:01:54,581 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:01:54,582 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:01:54,586 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:01:54,587 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:01:54,587 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:01:54,587 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:01:54,587 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:01:54,587 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:01:54,588 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:01:54,588 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:01:54,588 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:01:54,588 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:01:54,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:01:54,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:01:54,589 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:01:54,589 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:01:54,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:01:54,590 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:01:54,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:01:54,590 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:01:54,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:01:54,591 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:01:54,592 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:01:54,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 [2024-10-13 07:01:54,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:01:54,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:01:54,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:01:54,885 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:01:54,885 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:01:54,887 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i [2024-10-13 07:01:56,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:01:56,409 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:01:56,410 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i [2024-10-13 07:01:56,425 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3caa77483/2153d6689f244d0aa6559dbfff6c59fd/FLAGaa67198c9 [2024-10-13 07:01:56,757 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3caa77483/2153d6689f244d0aa6559dbfff6c59fd [2024-10-13 07:01:56,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:01:56,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:01:56,761 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:01:56,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:01:56,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:01:56,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:56" (1/1) ... [2024-10-13 07:01:56,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7264bfa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:56, skipping insertion in model container [2024-10-13 07:01:56,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:56" (1/1) ... [2024-10-13 07:01:56,802 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:01:57,137 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_08-cond_racefree.i[41322,41335] [2024-10-13 07:01:57,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:01:57,179 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:01:57,223 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_08-cond_racefree.i[41322,41335] [2024-10-13 07:01:57,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:01:57,288 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:01:57,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57 WrapperNode [2024-10-13 07:01:57,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:01:57,291 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:01:57,291 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:01:57,292 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:01:57,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,316 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,337 INFO L138 Inliner]: procedures = 271, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2024-10-13 07:01:57,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:01:57,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:01:57,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:01:57,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:01:57,347 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,350 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,370 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]. [2024-10-13 07:01:57,371 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,371 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,385 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:01:57,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:01:57,401 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:01:57,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:01:57,402 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (1/1) ... [2024-10-13 07:01:57,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:01:57,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:01:57,439 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) [2024-10-13 07:01:57,441 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 [2024-10-13 07:01:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 07:01:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 07:01:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 07:01:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:01:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:01:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 07:01:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 07:01:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:01:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:01:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 07:01:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 07:01:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 07:01:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:01:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-13 07:01:57,478 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-13 07:01:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:01:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:01:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 07:01:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 07:01:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:01:57,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:01:57,482 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:01:57,610 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:01:57,612 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:01:57,864 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:01:57,864 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:01:57,985 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:01:57,985 INFO L314 CfgBuilder]: Removed 10 assume(true) statements. [2024-10-13 07:01:57,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:57 BoogieIcfgContainer [2024-10-13 07:01:57,986 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:01:57,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:01:57,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:01:57,992 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:01:57,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:01:56" (1/3) ... [2024-10-13 07:01:57,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173a1384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:57, skipping insertion in model container [2024-10-13 07:01:57,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:57" (2/3) ... [2024-10-13 07:01:57,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173a1384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:57, skipping insertion in model container [2024-10-13 07:01:57,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:57" (3/3) ... [2024-10-13 07:01:57,995 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2024-10-13 07:01:58,009 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:01:58,009 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:01:58,009 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:01:58,042 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-13 07:01:58,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 56 transitions, 119 flow [2024-10-13 07:01:58,107 INFO L124 PetriNetUnfolderBase]: 19/83 cut-off events. [2024-10-13 07:01:58,107 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 07:01:58,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 19/83 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 269 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2024-10-13 07:01:58,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 56 transitions, 119 flow [2024-10-13 07:01:58,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 54 transitions, 112 flow [2024-10-13 07:01:58,128 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:01:58,135 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;@73a68097, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:01:58,136 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-13 07:01:58,142 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:01:58,143 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-13 07:01:58,144 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 07:01:58,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:01:58,145 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-13 07:01:58,145 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:01:58,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:01:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1429700097, now seen corresponding path program 1 times [2024-10-13 07:01:58,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:01:58,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716528769] [2024-10-13 07:01:58,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:01:58,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:01:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 07:01:58,282 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 07:01:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 07:01:58,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 07:01:58,331 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 07:01:58,332 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-13 07:01:58,334 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-13 07:01:58,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:01:58,335 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-13 07:01:58,340 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 07:01:58,342 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 07:01:58,364 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:01:58,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 81 transitions, 178 flow [2024-10-13 07:01:58,394 INFO L124 PetriNetUnfolderBase]: 33/142 cut-off events. [2024-10-13 07:01:58,395 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-13 07:01:58,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 142 events. 33/142 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 566 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 87. Up to 9 conditions per place. [2024-10-13 07:01:58,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 81 transitions, 178 flow [2024-10-13 07:01:58,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 81 transitions, 178 flow [2024-10-13 07:01:58,400 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:01:58,401 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;@73a68097, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:01:58,401 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-13 07:01:58,415 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:01:58,416 INFO L124 PetriNetUnfolderBase]: 8/52 cut-off events. [2024-10-13 07:01:58,416 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:01:58,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:01:58,416 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-13 07:01:58,417 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:01:58,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:01:58,419 INFO L85 PathProgramCache]: Analyzing trace with hash 262338433, now seen corresponding path program 1 times [2024-10-13 07:01:58,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:01:58,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840650060] [2024-10-13 07:01:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:01:58,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:01:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 07:01:58,444 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 07:01:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 07:01:58,466 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 07:01:58,466 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 07:01:58,466 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-13 07:01:58,466 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-13 07:01:58,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:01:58,467 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-13 07:01:58,467 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 07:01:58,467 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 07:01:58,490 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-13 07:01:58,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 106 transitions, 239 flow [2024-10-13 07:01:58,547 INFO L124 PetriNetUnfolderBase]: 50/212 cut-off events. [2024-10-13 07:01:58,547 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-13 07:01:58,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 212 events. 50/212 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 906 event pairs, 1 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 153. Up to 12 conditions per place. [2024-10-13 07:01:58,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 106 transitions, 239 flow [2024-10-13 07:01:58,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 106 transitions, 239 flow [2024-10-13 07:01:58,551 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:01:58,552 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;@73a68097, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:01:58,552 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-13 07:01:58,557 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:01:58,558 INFO L124 PetriNetUnfolderBase]: 9/58 cut-off events. [2024-10-13 07:01:58,558 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:01:58,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:01:58,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:01:58,558 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:01:58,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:01:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1538963410, now seen corresponding path program 1 times [2024-10-13 07:01:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:01:58,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423767479] [2024-10-13 07:01:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:01:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:01:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:01:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:01:58,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:01:58,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423767479] [2024-10-13 07:01:58,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423767479] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:01:58,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:01:58,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:01:58,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159812603] [2024-10-13 07:01:58,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:01:58,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:01:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:01:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:01:58,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:01:58,706 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 106 [2024-10-13 07:01:58,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2024-10-13 07:01:58,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:01:58,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 106 [2024-10-13 07:01:58,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:02:04,506 INFO L124 PetriNetUnfolderBase]: 44900/72634 cut-off events. [2024-10-13 07:02:04,507 INFO L125 PetriNetUnfolderBase]: For 1369/1369 co-relation queries the response was YES. [2024-10-13 07:02:04,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134540 conditions, 72634 events. 44900/72634 cut-off events. For 1369/1369 co-relation queries the response was YES. Maximal size of possible extension queue 2008. Compared 637248 event pairs, 26352 based on Foata normal form. 20384/87864 useless extension candidates. Maximal degree in co-relation 10325. Up to 61095 conditions per place. [2024-10-13 07:02:04,872 INFO L140 encePairwiseOnDemand]: 82/106 looper letters, 49 selfloop transitions, 2 changer transitions 11/96 dead transitions. [2024-10-13 07:02:04,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 96 transitions, 337 flow [2024-10-13 07:02:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:02:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:02:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2024-10-13 07:02:04,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-10-13 07:02:04,891 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 239 flow. Second operand 3 states and 198 transitions. [2024-10-13 07:02:04,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 96 transitions, 337 flow [2024-10-13 07:02:04,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 96 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:02:04,907 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 178 flow [2024-10-13 07:02:04,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2024-10-13 07:02:04,914 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 3 predicate places. [2024-10-13 07:02:04,914 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 178 flow [2024-10-13 07:02:04,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2024-10-13 07:02:04,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:02:04,915 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-13 07:02:04,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:02:04,915 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:02:04,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:02:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1601493726, now seen corresponding path program 1 times [2024-10-13 07:02:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:02:04,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842312586] [2024-10-13 07:02:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:02:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:02:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 07:02:04,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 07:02:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 07:02:04,983 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 07:02:04,983 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 07:02:04,983 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-13 07:02:04,984 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-13 07:02:04,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:02:04,984 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-13 07:02:04,985 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 07:02:04,985 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-13 07:02:05,014 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 07:02:05,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 131 transitions, 302 flow [2024-10-13 07:02:05,046 INFO L124 PetriNetUnfolderBase]: 75/306 cut-off events. [2024-10-13 07:02:05,046 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-13 07:02:05,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 306 events. 75/306 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1368 event pairs, 6 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 236. Up to 32 conditions per place. [2024-10-13 07:02:05,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 131 transitions, 302 flow [2024-10-13 07:02:05,054 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 131 transitions, 302 flow [2024-10-13 07:02:05,054 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:02:05,056 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;@73a68097, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:02:05,056 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-13 07:02:05,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:02:05,061 INFO L124 PetriNetUnfolderBase]: 9/58 cut-off events. [2024-10-13 07:02:05,061 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:02:05,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:02:05,061 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:02:05,061 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:02:05,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:02:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1539847893, now seen corresponding path program 1 times [2024-10-13 07:02:05,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:02:05,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164700893] [2024-10-13 07:02:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:02:05,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:02:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:02:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:02:05,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:02:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164700893] [2024-10-13 07:02:05,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164700893] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:02:05,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:02:05,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:02:05,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223988531] [2024-10-13 07:02:05,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:02:05,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:02:05,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:02:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:02:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:02:05,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 131 [2024-10-13 07:02:05,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 131 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2024-10-13 07:02:05,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:02:05,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 131 [2024-10-13 07:02:05,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand