./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:11:18,246 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:11:18,302 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:11:18,305 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:11:18,306 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:11:18,326 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:11:18,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:11:18,330 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:11:18,330 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:11:18,331 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:11:18,331 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:11:18,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:11:18,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:11:18,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:11:18,332 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:11:18,332 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:11:18,333 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:11:18,333 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:11:18,333 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:11:18,333 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:11:18,334 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:11:18,334 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:11:18,335 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:11:18,335 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:11:18,335 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:11:18,335 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:11:18,335 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:11:18,336 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:11:18,336 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:11:18,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:11:18,337 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:11:18,337 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:11:18,337 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:11:18,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:11:18,338 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:11:18,338 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:11:18,338 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:11:18,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:11:18,338 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:11:18,339 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:11:18,339 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:11:18,339 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:11:18,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 [2024-10-24 19:11:18,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:11:18,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:11:18,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:11:18,595 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:11:18,595 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:11:18,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2024-10-24 19:11:20,104 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:11:20,310 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:11:20,311 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2024-10-24 19:11:20,326 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/936ce1f04/a8295290ed774412b89deeefc6250091/FLAG234cbad86 [2024-10-24 19:11:20,343 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/936ce1f04/a8295290ed774412b89deeefc6250091 [2024-10-24 19:11:20,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:11:20,347 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:11:20,350 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:11:20,350 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:11:20,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:11:20,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d573e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20, skipping insertion in model container [2024-10-24 19:11:20,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,401 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:11:20,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:11:20,706 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:11:20,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:11:20,807 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:11:20,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20 WrapperNode [2024-10-24 19:11:20,808 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:11:20,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:11:20,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:11:20,809 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:11:20,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,856 INFO L138 Inliner]: procedures = 172, calls = 61, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 157 [2024-10-24 19:11:20,857 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:11:20,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:11:20,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:11:20,858 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:11:20,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,870 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,891 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 2, 5, 5]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 0, 5, 5]. The 1 writes are split as follows [0, 0, 1, 0, 0]. [2024-10-24 19:11:20,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,902 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,909 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:11:20,923 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:11:20,923 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:11:20,923 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:11:20,924 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (1/1) ... [2024-10-24 19:11:20,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:11:20,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:20,964 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 19:11:20,972 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 19:11:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:11:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:11:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 19:11:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 19:11:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-24 19:11:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:11:21,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:11:21,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 19:11:21,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 19:11:21,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-24 19:11:21,016 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 19:11:21,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:11:21,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 19:11:21,016 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 19:11:21,017 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 19:11:21,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 19:11:21,017 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2024-10-24 19:11:21,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 19:11:21,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 19:11:21,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 19:11:21,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 19:11:21,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-24 19:11:21,018 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 19:11:21,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:11:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:11:21,021 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 19:11:21,228 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:11:21,230 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:11:21,495 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:11:21,496 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:11:21,643 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:11:21,646 INFO L314 CfgBuilder]: Removed 23 assume(true) statements. [2024-10-24 19:11:21,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:11:21 BoogieIcfgContainer [2024-10-24 19:11:21,646 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:11:21,648 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:11:21,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:11:21,651 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:11:21,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:11:20" (1/3) ... [2024-10-24 19:11:21,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616957db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:11:21, skipping insertion in model container [2024-10-24 19:11:21,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:20" (2/3) ... [2024-10-24 19:11:21,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616957db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:11:21, skipping insertion in model container [2024-10-24 19:11:21,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:11:21" (3/3) ... [2024-10-24 19:11:21,655 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2024-10-24 19:11:21,668 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:11:21,668 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-10-24 19:11:21,668 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:11:21,706 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-24 19:11:21,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 137 transitions, 281 flow [2024-10-24 19:11:21,780 INFO L124 PetriNetUnfolderBase]: 49/223 cut-off events. [2024-10-24 19:11:21,780 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 19:11:21,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 223 events. 49/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1081 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2024-10-24 19:11:21,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 137 transitions, 281 flow [2024-10-24 19:11:21,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 137 transitions, 281 flow [2024-10-24 19:11:21,804 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:11:21,809 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=None, 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;@49a0fd49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:11:21,809 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-24 19:11:21,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:11:21,811 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-24 19:11:21,812 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:11:21,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:21,812 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:11:21,812 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-24 19:11:21,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash 617243, now seen corresponding path program 1 times [2024-10-24 19:11:21,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:21,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796567911] [2024-10-24 19:11:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:21,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:22,039 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 19:11:22,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:22,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796567911] [2024-10-24 19:11:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796567911] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:22,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:22,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083623909] [2024-10-24 19:11:22,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:22,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:22,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 137 [2024-10-24 19:11:22,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 137 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 19:11:22,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:22,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 137 [2024-10-24 19:11:22,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:22,509 INFO L124 PetriNetUnfolderBase]: 632/1936 cut-off events. [2024-10-24 19:11:22,509 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 19:11:22,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3273 conditions, 1936 events. 632/1936 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 12517 event pairs, 578 based on Foata normal form. 513/2386 useless extension candidates. Maximal degree in co-relation 3158. Up to 1259 conditions per place. [2024-10-24 19:11:22,525 INFO L140 encePairwiseOnDemand]: 104/137 looper letters, 71 selfloop transitions, 2 changer transitions 1/119 dead transitions. [2024-10-24 19:11:22,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 119 transitions, 393 flow [2024-10-24 19:11:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2024-10-24 19:11:22,535 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6131386861313869 [2024-10-24 19:11:22,537 INFO L175 Difference]: Start difference. First operand has 109 places, 137 transitions, 281 flow. Second operand 3 states and 252 transitions. [2024-10-24 19:11:22,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 119 transitions, 393 flow [2024-10-24 19:11:22,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 119 transitions, 393 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:11:22,543 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 213 flow [2024-10-24 19:11:22,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2024-10-24 19:11:22,547 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -4 predicate places. [2024-10-24 19:11:22,547 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 213 flow [2024-10-24 19:11:22,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 19:11:22,548 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:22,548 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:11:22,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:11:22,548 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-24 19:11:22,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash 617244, now seen corresponding path program 1 times [2024-10-24 19:11:22,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:22,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124362803] [2024-10-24 19:11:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:22,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:22,691 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 19:11:22,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:22,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124362803] [2024-10-24 19:11:22,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124362803] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:22,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:22,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:22,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321139863] [2024-10-24 19:11:22,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:22,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:22,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:22,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 137 [2024-10-24 19:11:22,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 19:11:22,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:22,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 137 [2024-10-24 19:11:22,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:22,967 INFO L124 PetriNetUnfolderBase]: 596/1804 cut-off events. [2024-10-24 19:11:22,967 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 19:11:22,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1804 events. 596/1804 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 11379 event pairs, 528 based on Foata normal form. 1/1728 useless extension candidates. Maximal degree in co-relation 3027. Up to 1206 conditions per place. [2024-10-24 19:11:22,974 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 71 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2024-10-24 19:11:22,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 119 transitions, 395 flow [2024-10-24 19:11:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-10-24 19:11:22,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5328467153284672 [2024-10-24 19:11:22,976 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 213 flow. Second operand 3 states and 219 transitions. [2024-10-24 19:11:22,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 119 transitions, 395 flow [2024-10-24 19:11:22,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 119 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:11:22,980 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 219 flow [2024-10-24 19:11:22,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2024-10-24 19:11:22,981 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -4 predicate places. [2024-10-24 19:11:22,981 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 219 flow [2024-10-24 19:11:22,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 19:11:22,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:22,981 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-24 19:11:22,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 19:11:22,982 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-24 19:11:22,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:22,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1172063688, now seen corresponding path program 1 times [2024-10-24 19:11:22,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:22,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706804825] [2024-10-24 19:11:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:22,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:23,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:23,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706804825] [2024-10-24 19:11:23,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706804825] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:23,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425291904] [2024-10-24 19:11:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:23,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:23,125 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 19:11:23,127 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 19:11:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:23,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:11:23,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:23,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 19:11:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:23,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:11:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:23,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425291904] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:11:23,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:11:23,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-24 19:11:23,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909436560] [2024-10-24 19:11:23,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:11:23,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:11:23,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:11:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:11:23,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 137 [2024-10-24 19:11:23,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 219 flow. Second operand has 9 states, 9 states have (on average 49.333333333333336) internal successors, (444), 9 states have internal predecessors, (444), 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 19:11:23,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:23,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 137 [2024-10-24 19:11:23,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:23,570 INFO L124 PetriNetUnfolderBase]: 51/184 cut-off events. [2024-10-24 19:11:23,570 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-24 19:11:23,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 184 events. 51/184 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 433 event pairs, 32 based on Foata normal form. 36/219 useless extension candidates. Maximal degree in co-relation 335. Up to 105 conditions per place. [2024-10-24 19:11:23,571 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 39 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-10-24 19:11:23,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 208 flow [2024-10-24 19:11:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:11:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:11:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-10-24 19:11:23,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4215328467153285 [2024-10-24 19:11:23,572 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 219 flow. Second operand 4 states and 231 transitions. [2024-10-24 19:11:23,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 208 flow [2024-10-24 19:11:23,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:11:23,574 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 86 flow [2024-10-24 19:11:23,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-10-24 19:11:23,574 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -64 predicate places. [2024-10-24 19:11:23,574 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 86 flow [2024-10-24 19:11:23,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 49.333333333333336) internal successors, (444), 9 states have internal predecessors, (444), 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 19:11:23,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:23,575 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-24 19:11:23,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 19:11:23,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:23,780 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-24 19:11:23,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:23,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1974235283, now seen corresponding path program 1 times [2024-10-24 19:11:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:23,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045064833] [2024-10-24 19:11:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:11:23,801 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 19:11:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:11:23,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 19:11:23,829 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 19:11:23,830 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-10-24 19:11:23,831 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-10-24 19:11:23,831 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-10-24 19:11:23,831 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-10-24 19:11:23,831 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2024-10-24 19:11:23,832 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2024-10-24 19:11:23,832 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2024-10-24 19:11:23,832 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-10-24 19:11:23,832 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2024-10-24 19:11:23,832 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-10-24 19:11:23,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 19:11:23,832 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-24 19:11:23,834 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 19:11:23,834 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 19:11:23,855 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 19:11:23,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 184 transitions, 384 flow [2024-10-24 19:11:23,875 INFO L124 PetriNetUnfolderBase]: 81/368 cut-off events. [2024-10-24 19:11:23,876 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-24 19:11:23,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 368 events. 81/368 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2003 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 227. Up to 9 conditions per place. [2024-10-24 19:11:23,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 184 transitions, 384 flow [2024-10-24 19:11:23,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 184 transitions, 384 flow [2024-10-24 19:11:23,881 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:11:23,882 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=None, 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;@49a0fd49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:11:23,882 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-24 19:11:23,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:11:23,883 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-24 19:11:23,883 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:11:23,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:23,883 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:11:23,883 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-24 19:11:23,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:23,884 INFO L85 PathProgramCache]: Analyzing trace with hash 799955, now seen corresponding path program 1 times [2024-10-24 19:11:23,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:23,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55236212] [2024-10-24 19:11:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:23,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:23,903 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 19:11:23,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:23,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55236212] [2024-10-24 19:11:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55236212] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:23,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:23,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:23,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667393925] [2024-10-24 19:11:23,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:23,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:23,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 184 [2024-10-24 19:11:23,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 184 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 19:11:23,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:23,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 184 [2024-10-24 19:11:23,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:27,659 INFO L124 PetriNetUnfolderBase]: 23415/46871 cut-off events. [2024-10-24 19:11:27,660 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-10-24 19:11:27,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83170 conditions, 46871 events. 23415/46871 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 444308 event pairs, 21760 based on Foata normal form. 14736/60095 useless extension candidates. Maximal degree in co-relation 70699. Up to 34187 conditions per place. [2024-10-24 19:11:27,952 INFO L140 encePairwiseOnDemand]: 139/184 looper letters, 107 selfloop transitions, 2 changer transitions 1/171 dead transitions. [2024-10-24 19:11:27,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 171 transitions, 578 flow [2024-10-24 19:11:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2024-10-24 19:11:27,956 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-10-24 19:11:27,956 INFO L175 Difference]: Start difference. First operand has 145 places, 184 transitions, 384 flow. Second operand 3 states and 360 transitions. [2024-10-24 19:11:27,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 171 transitions, 578 flow [2024-10-24 19:11:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 171 transitions, 578 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:11:27,961 INFO L231 Difference]: Finished difference. Result has 141 places, 136 transitions, 292 flow [2024-10-24 19:11:27,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2024-10-24 19:11:27,966 INFO L277 CegarLoopForPetriNet]: 145 programPoint places, -4 predicate places. [2024-10-24 19:11:27,966 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 292 flow [2024-10-24 19:11:27,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 19:11:27,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:27,967 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:11:27,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 19:11:27,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-24 19:11:27,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash 799956, now seen corresponding path program 1 times [2024-10-24 19:11:27,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:27,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52465198] [2024-10-24 19:11:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:27,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:28,039 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 19:11:28,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:28,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52465198] [2024-10-24 19:11:28,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52465198] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:28,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:28,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488037949] [2024-10-24 19:11:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:28,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:28,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 184 [2024-10-24 19:11:28,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 19:11:28,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:28,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 184 [2024-10-24 19:11:28,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:31,269 INFO L124 PetriNetUnfolderBase]: 22121/45112 cut-off events. [2024-10-24 19:11:31,269 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-10-24 19:11:31,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79717 conditions, 45112 events. 22121/45112 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 432040 event pairs, 21743 based on Foata normal form. 1/43317 useless extension candidates. Maximal degree in co-relation 76973. Up to 34125 conditions per place. [2024-10-24 19:11:31,480 INFO L140 encePairwiseOnDemand]: 180/184 looper letters, 91 selfloop transitions, 2 changer transitions 0/155 dead transitions. [2024-10-24 19:11:31,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 155 transitions, 516 flow [2024-10-24 19:11:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-10-24 19:11:31,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.519927536231884 [2024-10-24 19:11:31,482 INFO L175 Difference]: Start difference. First operand has 141 places, 136 transitions, 292 flow. Second operand 3 states and 287 transitions. [2024-10-24 19:11:31,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 155 transitions, 516 flow [2024-10-24 19:11:31,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 512 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:11:31,521 INFO L231 Difference]: Finished difference. Result has 141 places, 137 transitions, 302 flow [2024-10-24 19:11:31,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=141, PETRI_TRANSITIONS=137} [2024-10-24 19:11:31,524 INFO L277 CegarLoopForPetriNet]: 145 programPoint places, -4 predicate places. [2024-10-24 19:11:31,524 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 137 transitions, 302 flow [2024-10-24 19:11:31,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 19:11:31,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:31,525 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-24 19:11:31,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 19:11:31,525 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-24 19:11:31,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:31,526 INFO L85 PathProgramCache]: Analyzing trace with hash 69585571, now seen corresponding path program 1 times [2024-10-24 19:11:31,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:31,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134419254] [2024-10-24 19:11:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:31,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:31,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134419254] [2024-10-24 19:11:31,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134419254] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:31,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389256443] [2024-10-24 19:11:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:31,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:31,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:31,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:11:31,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 19:11:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:31,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:11:31,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:31,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 19:11:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:31,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:11:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:31,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389256443] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:11:31,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:11:31,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-24 19:11:31,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055332065] [2024-10-24 19:11:31,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:11:31,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:11:31,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:31,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:11:31,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:11:31,894 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 184 [2024-10-24 19:11:31,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 137 transitions, 302 flow. Second operand has 9 states, 9 states have (on average 65.33333333333333) internal successors, (588), 9 states have internal predecessors, (588), 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 19:11:31,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:31,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 184 [2024-10-24 19:11:31,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:32,482 INFO L124 PetriNetUnfolderBase]: 2193/4215 cut-off events. [2024-10-24 19:11:32,483 INFO L125 PetriNetUnfolderBase]: For 741/741 co-relation queries the response was YES. [2024-10-24 19:11:32,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8202 conditions, 4215 events. 2193/4215 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 28219 event pairs, 320 based on Foata normal form. 684/4710 useless extension candidates. Maximal degree in co-relation 7610. Up to 2808 conditions per place. [2024-10-24 19:11:32,496 INFO L140 encePairwiseOnDemand]: 180/184 looper letters, 93 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2024-10-24 19:11:32,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 129 transitions, 468 flow [2024-10-24 19:11:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:11:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:11:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2024-10-24 19:11:32,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45108695652173914 [2024-10-24 19:11:32,504 INFO L175 Difference]: Start difference. First operand has 141 places, 137 transitions, 302 flow. Second operand 5 states and 415 transitions. [2024-10-24 19:11:32,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 129 transitions, 468 flow [2024-10-24 19:11:32,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 466 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:11:32,508 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 170 flow [2024-10-24 19:11:32,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-10-24 19:11:32,508 INFO L277 CegarLoopForPetriNet]: 145 programPoint places, -61 predicate places. [2024-10-24 19:11:32,509 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 170 flow [2024-10-24 19:11:32,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 65.33333333333333) internal successors, (588), 9 states have internal predecessors, (588), 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 19:11:32,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:32,510 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-10-24 19:11:32,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 19:11:32,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-24 19:11:32,711 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-24 19:11:32,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:32,711 INFO L85 PathProgramCache]: Analyzing trace with hash -948414375, now seen corresponding path program 1 times [2024-10-24 19:11:32,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:32,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450030991] [2024-10-24 19:11:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:32,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:11:32,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 19:11:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:11:32,750 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 19:11:32,753 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 19:11:32,753 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-10-24 19:11:32,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-10-24 19:11:32,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-10-24 19:11:32,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-10-24 19:11:32,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2024-10-24 19:11:32,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2024-10-24 19:11:32,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2024-10-24 19:11:32,756 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-10-24 19:11:32,756 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2024-10-24 19:11:32,756 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-10-24 19:11:32,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 19:11:32,756 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-24 19:11:32,757 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 19:11:32,758 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 19:11:32,784 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 19:11:32,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 231 transitions, 489 flow [2024-10-24 19:11:32,812 INFO L124 PetriNetUnfolderBase]: 116/534 cut-off events. [2024-10-24 19:11:32,812 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-24 19:11:32,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 534 events. 116/534 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3055 event pairs, 1 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 379. Up to 12 conditions per place. [2024-10-24 19:11:32,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 231 transitions, 489 flow [2024-10-24 19:11:32,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 231 transitions, 489 flow [2024-10-24 19:11:32,820 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:11:32,821 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=None, 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;@49a0fd49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:11:32,821 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-24 19:11:32,822 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:11:32,822 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-24 19:11:32,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:11:32,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:32,822 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:11:32,822 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-24 19:11:32,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:32,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1029338, now seen corresponding path program 1 times [2024-10-24 19:11:32,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:32,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738736886] [2024-10-24 19:11:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:32,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:32,840 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 19:11:32,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:32,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738736886] [2024-10-24 19:11:32,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738736886] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:32,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:32,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937985126] [2024-10-24 19:11:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:32,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:32,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:32,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 231 [2024-10-24 19:11:32,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 489 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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 19:11:32,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:32,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 231 [2024-10-24 19:11:32,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand