./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../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 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU --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-4fc63b2 [2024-10-31 22:09:12,519 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:09:12,589 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:09:12,594 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:09:12,594 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:09:12,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:09:12,620 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:09:12,620 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:09:12,621 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:09:12,621 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:09:12,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:09:12,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:09:12,625 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:09:12,626 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:09:12,626 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:09:12,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:09:12,627 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:09:12,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:09:12,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:09:12,628 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:09:12,632 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:09:12,632 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:09:12,633 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:09:12,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:09:12,633 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:09:12,634 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:09:12,634 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:09:12,634 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:09:12,639 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:09:12,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:09:12,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:09:12,640 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:09:12,640 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:09:12,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:09:12,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:09:12,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:09:12,642 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:09:12,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:09:12,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:09:12,646 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:09:12,646 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:09:12,647 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:09:12,647 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 [2024-10-31 22:09:12,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:09:12,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:09:12,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:09:12,944 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:09:12,944 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:09:12,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i Unable to find full path for "g++" [2024-10-31 22:09:15,000 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:09:15,249 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:09:15,249 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2024-10-31 22:09:15,278 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/data/689758796/e3241fed875646f8b86d80a103205c69/FLAG2084f6961 [2024-10-31 22:09:15,578 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/data/689758796/e3241fed875646f8b86d80a103205c69 [2024-10-31 22:09:15,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:09:15,582 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:09:15,583 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:09:15,583 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:09:15,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:09:15,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:09:15" (1/1) ... [2024-10-31 22:09:15,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c3f01a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:15, skipping insertion in model container [2024-10-31 22:09:15,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:09:15" (1/1) ... [2024-10-31 22:09:15,665 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:09:16,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:09:16,167 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:09:16,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:09:16,318 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:09:16,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16 WrapperNode [2024-10-31 22:09:16,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:09:16,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:09:16,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:09:16,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:09:16,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,356 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,397 INFO L138 Inliner]: procedures = 172, calls = 61, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 157 [2024-10-31 22:09:16,397 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:09:16,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:09:16,398 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:09:16,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:09:16,414 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,420 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,447 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2024-10-31 22:09:16,448 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,448 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,472 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,487 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,499 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:09:16,500 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:09:16,500 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:09:16,500 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:09:16,505 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (1/1) ... [2024-10-31 22:09:16,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:09:16,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:16,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:09:16,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:09:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:09:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:09:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:09:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 22:09:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-31 22:09:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:09:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:09:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:09:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 22:09:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-31 22:09:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 22:09:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:09:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:09:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-31 22:09:16,611 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-31 22:09:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:09:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2024-10-31 22:09:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:09:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:09:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:09:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:09:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-31 22:09:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 22:09:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:09:16,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:09:16,616 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:09:16,838 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:09:16,842 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:09:17,364 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:09:17,367 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:09:17,626 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:09:17,627 INFO L316 CfgBuilder]: Removed 23 assume(true) statements. [2024-10-31 22:09:17,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:09:17 BoogieIcfgContainer [2024-10-31 22:09:17,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:09:17,633 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:09:17,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:09:17,637 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:09:17,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:09:15" (1/3) ... [2024-10-31 22:09:17,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b9474f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:09:17, skipping insertion in model container [2024-10-31 22:09:17,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:16" (2/3) ... [2024-10-31 22:09:17,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b9474f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:09:17, skipping insertion in model container [2024-10-31 22:09:17,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:09:17" (3/3) ... [2024-10-31 22:09:17,640 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2024-10-31 22:09:17,658 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:09:17,659 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-10-31 22:09:17,659 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:09:17,720 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-31 22:09:17,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 137 transitions, 281 flow [2024-10-31 22:09:17,837 INFO L124 PetriNetUnfolderBase]: 49/223 cut-off events. [2024-10-31 22:09:17,838 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:09:17,849 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. [2024-10-31 22:09:17,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 137 transitions, 281 flow [2024-10-31 22:09:17,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 137 transitions, 281 flow [2024-10-31 22:09:17,872 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:09:17,882 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;@5bbabfba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:09:17,883 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-31 22:09:17,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:09:17,887 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-31 22:09:17,888 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:09:17,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:17,889 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:09:17,889 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)] === [2024-10-31 22:09:17,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:17,895 INFO L85 PathProgramCache]: Analyzing trace with hash 617243, now seen corresponding path program 1 times [2024-10-31 22:09:17,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:17,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560721999] [2024-10-31 22:09:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:17,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560721999] [2024-10-31 22:09:18,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560721999] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:18,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:18,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:09:18,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167395479] [2024-10-31 22:09:18,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:18,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:09:18,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:09:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:09:18,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 137 [2024-10-31 22:09:18,312 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) [2024-10-31 22:09:18,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:18,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 137 [2024-10-31 22:09:18,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:18,966 INFO L124 PetriNetUnfolderBase]: 632/1936 cut-off events. [2024-10-31 22:09:18,966 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:09:18,974 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. [2024-10-31 22:09:18,983 INFO L140 encePairwiseOnDemand]: 104/137 looper letters, 71 selfloop transitions, 2 changer transitions 1/119 dead transitions. [2024-10-31 22:09:18,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 119 transitions, 393 flow [2024-10-31 22:09:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:09:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:09:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2024-10-31 22:09:19,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6131386861313869 [2024-10-31 22:09:19,005 INFO L175 Difference]: Start difference. First operand has 109 places, 137 transitions, 281 flow. Second operand 3 states and 252 transitions. [2024-10-31 22:09:19,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 119 transitions, 393 flow [2024-10-31 22:09:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 119 transitions, 393 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:09:19,015 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 213 flow [2024-10-31 22:09:19,018 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} [2024-10-31 22:09:19,024 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -4 predicate places. [2024-10-31 22:09:19,025 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 213 flow [2024-10-31 22:09:19,025 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) [2024-10-31 22:09:19,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:19,026 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:09:19,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:09:19,026 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)] === [2024-10-31 22:09:19,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash 617244, now seen corresponding path program 1 times [2024-10-31 22:09:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:19,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349350960] [2024-10-31 22:09:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:19,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:19,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349350960] [2024-10-31 22:09:19,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349350960] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:19,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:19,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:09:19,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020029119] [2024-10-31 22:09:19,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:19,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:09:19,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:19,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:09:19,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:09:19,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 137 [2024-10-31 22:09:19,316 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) [2024-10-31 22:09:19,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:19,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 137 [2024-10-31 22:09:19,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:19,764 INFO L124 PetriNetUnfolderBase]: 596/1804 cut-off events. [2024-10-31 22:09:19,765 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-31 22:09:19,769 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. [2024-10-31 22:09:19,777 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 71 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2024-10-31 22:09:19,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 119 transitions, 395 flow [2024-10-31 22:09:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:09:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:09:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-10-31 22:09:19,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5328467153284672 [2024-10-31 22:09:19,783 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 213 flow. Second operand 3 states and 219 transitions. [2024-10-31 22:09:19,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 119 transitions, 395 flow [2024-10-31 22:09:19,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 119 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:09:19,791 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 219 flow [2024-10-31 22:09:19,792 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} [2024-10-31 22:09:19,793 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -4 predicate places. [2024-10-31 22:09:19,794 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 219 flow [2024-10-31 22:09:19,795 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) [2024-10-31 22:09:19,796 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:19,796 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-31 22:09:19,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:09:19,798 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)] === [2024-10-31 22:09:19,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:19,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1172063688, now seen corresponding path program 1 times [2024-10-31 22:09:19,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:19,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21030350] [2024-10-31 22:09:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:19,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:20,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:20,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21030350] [2024-10-31 22:09:20,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21030350] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:20,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616655462] [2024-10-31 22:09:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:20,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:20,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:20,030 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:20,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:09:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:20,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:09:20,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:20,245 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 [2024-10-31 22:09:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:20,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:20,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616655462] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:09:20,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:09:20,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-31 22:09:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523034785] [2024-10-31 22:09:20,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:09:20,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:09:20,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:20,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:09:20,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:09:20,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 137 [2024-10-31 22:09:20,552 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) [2024-10-31 22:09:20,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:20,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 137 [2024-10-31 22:09:20,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:20,725 INFO L124 PetriNetUnfolderBase]: 51/184 cut-off events. [2024-10-31 22:09:20,726 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-31 22:09:20,726 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. [2024-10-31 22:09:20,727 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 39 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-10-31 22:09:20,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 208 flow [2024-10-31 22:09:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:09:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:09:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-10-31 22:09:20,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4215328467153285 [2024-10-31 22:09:20,731 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 219 flow. Second operand 4 states and 231 transitions. [2024-10-31 22:09:20,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 208 flow [2024-10-31 22:09:20,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:09:20,735 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 86 flow [2024-10-31 22:09:20,735 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} [2024-10-31 22:09:20,736 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -64 predicate places. [2024-10-31 22:09:20,736 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 86 flow [2024-10-31 22:09:20,737 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) [2024-10-31 22:09:20,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:20,738 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-31 22:09:20,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:09:20,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:20,942 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)] === [2024-10-31 22:09:20,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1974235283, now seen corresponding path program 1 times [2024-10-31 22:09:20,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:20,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987410579] [2024-10-31 22:09:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:20,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:09:20,980 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:09:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:09:21,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:09:21,036 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:09:21,039 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-10-31 22:09:21,041 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-10-31 22:09:21,042 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-10-31 22:09:21,042 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-10-31 22:09:21,045 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2024-10-31 22:09:21,046 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2024-10-31 22:09:21,046 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2024-10-31 22:09:21,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-10-31 22:09:21,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2024-10-31 22:09:21,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-10-31 22:09:21,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:09:21,048 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-31 22:09:21,051 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:09:21,052 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-31 22:09:21,088 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:09:21,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 184 transitions, 384 flow [2024-10-31 22:09:21,132 INFO L124 PetriNetUnfolderBase]: 81/368 cut-off events. [2024-10-31 22:09:21,132 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:09:21,135 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. [2024-10-31 22:09:21,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 184 transitions, 384 flow [2024-10-31 22:09:21,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 184 transitions, 384 flow [2024-10-31 22:09:21,141 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:09:21,142 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;@5bbabfba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:09:21,142 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-31 22:09:21,144 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:09:21,144 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-31 22:09:21,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:09:21,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:21,145 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:09:21,145 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)] === [2024-10-31 22:09:21,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:21,146 INFO L85 PathProgramCache]: Analyzing trace with hash 799955, now seen corresponding path program 1 times [2024-10-31 22:09:21,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:21,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892662844] [2024-10-31 22:09:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:21,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:21,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892662844] [2024-10-31 22:09:21,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892662844] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:21,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:21,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:09:21,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615708705] [2024-10-31 22:09:21,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:21,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:09:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:09:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:09:21,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 184 [2024-10-31 22:09:21,221 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) [2024-10-31 22:09:21,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:21,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 184 [2024-10-31 22:09:21,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:27,821 INFO L124 PetriNetUnfolderBase]: 23415/46871 cut-off events. [2024-10-31 22:09:27,822 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-10-31 22:09:27,910 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. [2024-10-31 22:09:28,212 INFO L140 encePairwiseOnDemand]: 139/184 looper letters, 107 selfloop transitions, 2 changer transitions 1/171 dead transitions. [2024-10-31 22:09:28,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 171 transitions, 578 flow [2024-10-31 22:09:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:09:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:09:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2024-10-31 22:09:28,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-10-31 22:09:28,217 INFO L175 Difference]: Start difference. First operand has 145 places, 184 transitions, 384 flow. Second operand 3 states and 360 transitions. [2024-10-31 22:09:28,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 171 transitions, 578 flow [2024-10-31 22:09:28,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 171 transitions, 578 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:09:28,225 INFO L231 Difference]: Finished difference. Result has 141 places, 136 transitions, 292 flow [2024-10-31 22:09:28,227 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} [2024-10-31 22:09:28,229 INFO L277 CegarLoopForPetriNet]: 145 programPoint places, -4 predicate places. [2024-10-31 22:09:28,229 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 292 flow [2024-10-31 22:09:28,230 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) [2024-10-31 22:09:28,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:28,231 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:09:28,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:09:28,231 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)] === [2024-10-31 22:09:28,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash 799956, now seen corresponding path program 1 times [2024-10-31 22:09:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:28,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344623845] [2024-10-31 22:09:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:28,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344623845] [2024-10-31 22:09:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344623845] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:28,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:09:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633847232] [2024-10-31 22:09:28,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:28,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:09:28,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:09:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:09:28,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 184 [2024-10-31 22:09:28,352 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) [2024-10-31 22:09:28,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:28,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 184 [2024-10-31 22:09:28,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:33,109 INFO L124 PetriNetUnfolderBase]: 22121/45112 cut-off events. [2024-10-31 22:09:33,109 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-10-31 22:09:33,184 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. [2024-10-31 22:09:33,342 INFO L140 encePairwiseOnDemand]: 180/184 looper letters, 91 selfloop transitions, 2 changer transitions 0/155 dead transitions. [2024-10-31 22:09:33,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 155 transitions, 516 flow [2024-10-31 22:09:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:09:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:09:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-10-31 22:09:33,344 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.519927536231884 [2024-10-31 22:09:33,345 INFO L175 Difference]: Start difference. First operand has 141 places, 136 transitions, 292 flow. Second operand 3 states and 287 transitions. [2024-10-31 22:09:33,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 155 transitions, 516 flow [2024-10-31 22:09:33,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 512 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:09:33,412 INFO L231 Difference]: Finished difference. Result has 141 places, 137 transitions, 302 flow [2024-10-31 22:09:33,413 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} [2024-10-31 22:09:33,418 INFO L277 CegarLoopForPetriNet]: 145 programPoint places, -4 predicate places. [2024-10-31 22:09:33,418 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 137 transitions, 302 flow [2024-10-31 22:09:33,419 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) [2024-10-31 22:09:33,419 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:33,419 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-31 22:09:33,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:09:33,420 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)] === [2024-10-31 22:09:33,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash 69585571, now seen corresponding path program 1 times [2024-10-31 22:09:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:33,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719873986] [2024-10-31 22:09:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:33,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:33,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:33,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719873986] [2024-10-31 22:09:33,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719873986] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:33,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694268317] [2024-10-31 22:09:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:33,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:33,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:33,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:33,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:09:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:33,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:09:33,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:33,713 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 [2024-10-31 22:09:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:33,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:33,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694268317] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:09:33,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:09:33,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-31 22:09:33,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252257192] [2024-10-31 22:09:33,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:09:33,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:09:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:09:33,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:09:33,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 184 [2024-10-31 22:09:33,942 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) [2024-10-31 22:09:33,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:33,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 184 [2024-10-31 22:09:33,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:34,783 INFO L124 PetriNetUnfolderBase]: 2193/4215 cut-off events. [2024-10-31 22:09:34,784 INFO L125 PetriNetUnfolderBase]: For 741/741 co-relation queries the response was YES. [2024-10-31 22:09:34,791 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. [2024-10-31 22:09:34,807 INFO L140 encePairwiseOnDemand]: 180/184 looper letters, 93 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2024-10-31 22:09:34,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 129 transitions, 468 flow [2024-10-31 22:09:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:09:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:09:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2024-10-31 22:09:34,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45108695652173914 [2024-10-31 22:09:34,810 INFO L175 Difference]: Start difference. First operand has 141 places, 137 transitions, 302 flow. Second operand 5 states and 415 transitions. [2024-10-31 22:09:34,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 129 transitions, 468 flow [2024-10-31 22:09:34,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 466 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:09:34,816 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 170 flow [2024-10-31 22:09:34,816 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} [2024-10-31 22:09:34,817 INFO L277 CegarLoopForPetriNet]: 145 programPoint places, -61 predicate places. [2024-10-31 22:09:34,817 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 170 flow [2024-10-31 22:09:34,818 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) [2024-10-31 22:09:34,818 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:34,818 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-10-31 22:09:34,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:09:35,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8249f92-ff87-4f9e-94c2-31a72556c455/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 22:09:35,023 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)] === [2024-10-31 22:09:35,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash -948414375, now seen corresponding path program 1 times [2024-10-31 22:09:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310174930] [2024-10-31 22:09:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:09:35,048 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:09:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:09:35,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:09:35,076 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:09:35,077 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-10-31 22:09:35,077 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-10-31 22:09:35,077 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-10-31 22:09:35,077 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-10-31 22:09:35,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2024-10-31 22:09:35,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2024-10-31 22:09:35,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2024-10-31 22:09:35,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-10-31 22:09:35,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2024-10-31 22:09:35,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-10-31 22:09:35,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:09:35,079 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-31 22:09:35,083 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:09:35,083 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-31 22:09:35,124 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:09:35,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 231 transitions, 489 flow [2024-10-31 22:09:35,196 INFO L124 PetriNetUnfolderBase]: 116/534 cut-off events. [2024-10-31 22:09:35,196 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-31 22:09:35,200 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. [2024-10-31 22:09:35,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 231 transitions, 489 flow [2024-10-31 22:09:35,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 231 transitions, 489 flow [2024-10-31 22:09:35,207 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:09:35,207 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;@5bbabfba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:09:35,208 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-31 22:09:35,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:09:35,210 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-31 22:09:35,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:09:35,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:35,210 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:09:35,210 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)] === [2024-10-31 22:09:35,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1029338, now seen corresponding path program 1 times [2024-10-31 22:09:35,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:35,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443613143] [2024-10-31 22:09:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:35,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:35,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:35,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443613143] [2024-10-31 22:09:35,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443613143] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:35,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:35,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:09:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166298540] [2024-10-31 22:09:35,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:35,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:09:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:09:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:09:35,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 231 [2024-10-31 22:09:35,260 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) [2024-10-31 22:09:35,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:35,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 231 [2024-10-31 22:09:35,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand