./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.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 a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:18:16,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:18:16,761 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:18:16,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:18:16,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:18:16,794 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:18:16,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:18:16,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:18:16,796 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:18:16,797 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:18:16,798 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:18:16,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:18:16,798 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:18:16,799 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:18:16,799 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:18:16,801 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:18:16,801 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:18:16,802 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:18:16,802 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:18:16,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:18:16,802 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:18:16,802 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:18:16,803 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:18:16,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:18:16,803 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:18:16,803 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:18:16,803 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:18:16,803 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:18:16,804 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:18:16,804 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:18:16,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:18:16,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:18:16,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:18:16,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:18:16,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:18:16,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:18:16,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:18:16,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:18:16,805 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:18:16,805 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:18:16,805 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:18:16,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:18:16,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2024-11-12 16:18:17,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:18:17,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:18:17,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:18:17,038 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:18:17,039 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:18:17,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2024-11-12 16:18:18,382 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:18:18,542 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:18:18,542 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2024-11-12 16:18:18,551 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/036825f95/b0efdc38b49446e38a5a4d0114736969/FLAG2068ec29e [2024-11-12 16:18:18,929 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/036825f95/b0efdc38b49446e38a5a4d0114736969 [2024-11-12 16:18:18,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:18:18,932 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:18:18,934 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:18:18,935 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:18:18,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:18:18,939 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:18:18" (1/1) ... [2024-11-12 16:18:18,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cef027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:18, skipping insertion in model container [2024-11-12 16:18:18,941 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:18:18" (1/1) ... [2024-11-12 16:18:18,978 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:18:19,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:18:19,274 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:18:19,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:18:19,339 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:18:19,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19 WrapperNode [2024-11-12 16:18:19,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:18:19,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:18:19,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:18:19,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:18:19,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,360 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,388 INFO L138 Inliner]: procedures = 174, calls = 45, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 149 [2024-11-12 16:18:19,388 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:18:19,389 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:18:19,389 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:18:19,389 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:18:19,397 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,400 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,410 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]. [2024-11-12 16:18:19,410 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,410 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,446 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,458 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:18:19,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:18:19,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:18:19,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:18:19,461 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (1/1) ... [2024-11-12 16:18:19,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:18:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:18:19,514 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) [2024-11-12 16:18:19,522 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 [2024-11-12 16:18:19,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:18:19,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:18:19,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:18:19,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-12 16:18:19,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-12 16:18:19,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:18:19,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:18:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:18:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-12 16:18:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-12 16:18:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 16:18:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:18:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-12 16:18:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-12 16:18:19,561 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-12 16:18:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-12 16:18:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:18:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:18:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:18:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-12 16:18:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-12 16:18:19,562 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 16:18:19,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:18:19,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:18:19,563 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:18:19,698 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:18:19,700 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:18:19,922 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:18:19,923 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:18:20,071 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:18:20,072 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-12 16:18:20,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:18:20 BoogieIcfgContainer [2024-11-12 16:18:20,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:18:20,074 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:18:20,074 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:18:20,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:18:20,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:18:18" (1/3) ... [2024-11-12 16:18:20,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3464b476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:18:20, skipping insertion in model container [2024-11-12 16:18:20,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:19" (2/3) ... [2024-11-12 16:18:20,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3464b476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:18:20, skipping insertion in model container [2024-11-12 16:18:20,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:18:20" (3/3) ... [2024-11-12 16:18:20,079 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2024-11-12 16:18:20,091 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:18:20,092 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-12 16:18:20,092 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:18:20,124 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-12 16:18:20,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 65 transitions, 137 flow [2024-11-12 16:18:20,201 INFO L124 PetriNetUnfolderBase]: 21/104 cut-off events. [2024-11-12 16:18:20,201 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:18:20,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 104 events. 21/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 384 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2024-11-12 16:18:20,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 65 transitions, 137 flow [2024-11-12 16:18:20,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 65 transitions, 137 flow [2024-11-12 16:18:20,230 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:20,241 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;@d822125, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:20,241 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-12 16:18:20,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:20,245 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:18:20,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:20,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:20,245 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:20,246 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-12 16:18:20,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash 421347, now seen corresponding path program 1 times [2024-11-12 16:18:20,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:20,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423373031] [2024-11-12 16:18:20,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:20,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:20,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:20,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423373031] [2024-11-12 16:18:20,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423373031] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:20,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:20,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:20,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024073553] [2024-11-12 16:18:20,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:20,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:20,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:20,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:20,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:20,581 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 65 [2024-11-12 16:18:20,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 65 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-12 16:18:20,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:20,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 65 [2024-11-12 16:18:20,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:20,721 INFO L124 PetriNetUnfolderBase]: 173/517 cut-off events. [2024-11-12 16:18:20,722 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:18:20,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 517 events. 173/517 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2797 event pairs, 136 based on Foata normal form. 97/576 useless extension candidates. Maximal degree in co-relation 828. Up to 337 conditions per place. [2024-11-12 16:18:20,727 INFO L140 encePairwiseOnDemand]: 51/65 looper letters, 39 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-11-12 16:18:20,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 209 flow [2024-11-12 16:18:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-12 16:18:20,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-11-12 16:18:20,744 INFO L175 Difference]: Start difference. First operand has 55 places, 65 transitions, 137 flow. Second operand 3 states and 114 transitions. [2024-11-12 16:18:20,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 209 flow [2024-11-12 16:18:20,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:20,748 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 115 flow [2024-11-12 16:18:20,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-11-12 16:18:20,752 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-11-12 16:18:20,752 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 115 flow [2024-11-12 16:18:20,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-12 16:18:20,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:20,753 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:20,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:18:20,753 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-12 16:18:20,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:20,754 INFO L85 PathProgramCache]: Analyzing trace with hash 421348, now seen corresponding path program 1 times [2024-11-12 16:18:20,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:20,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170277297] [2024-11-12 16:18:20,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:20,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:20,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:20,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170277297] [2024-11-12 16:18:20,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170277297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:20,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:20,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:20,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391344125] [2024-11-12 16:18:20,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:20,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:20,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:20,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:20,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:20,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 65 [2024-11-12 16:18:20,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-12 16:18:20,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:20,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 65 [2024-11-12 16:18:20,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:21,121 INFO L124 PetriNetUnfolderBase]: 162/477 cut-off events. [2024-11-12 16:18:21,121 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 16:18:21,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 477 events. 162/477 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2423 event pairs, 136 based on Foata normal form. 1/439 useless extension candidates. Maximal degree in co-relation 805. Up to 329 conditions per place. [2024-11-12 16:18:21,126 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 39 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-11-12 16:18:21,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 215 flow [2024-11-12 16:18:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-11-12 16:18:21,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-11-12 16:18:21,129 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 115 flow. Second operand 3 states and 109 transitions. [2024-11-12 16:18:21,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 215 flow [2024-11-12 16:18:21,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 211 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:18:21,132 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 121 flow [2024-11-12 16:18:21,132 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-11-12 16:18:21,133 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-11-12 16:18:21,134 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 121 flow [2024-11-12 16:18:21,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-12 16:18:21,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:21,135 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:21,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:18:21,137 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-12 16:18:21,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1706404823, now seen corresponding path program 1 times [2024-11-12 16:18:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:21,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960189084] [2024-11-12 16:18:21,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:21,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:21,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:21,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960189084] [2024-11-12 16:18:21,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960189084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:21,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:21,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:21,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513131754] [2024-11-12 16:18:21,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:21,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:18:21,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:18:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:18:21,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 65 [2024-11-12 16:18:21,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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) [2024-11-12 16:18:21,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:21,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 65 [2024-11-12 16:18:21,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:21,381 INFO L124 PetriNetUnfolderBase]: 24/90 cut-off events. [2024-11-12 16:18:21,381 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-12 16:18:21,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 90 events. 24/90 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 257 event pairs, 16 based on Foata normal form. 18/107 useless extension candidates. Maximal degree in co-relation 160. Up to 51 conditions per place. [2024-11-12 16:18:21,382 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 21 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-12 16:18:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 118 flow [2024-11-12 16:18:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:18:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:18:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-11-12 16:18:21,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41923076923076924 [2024-11-12 16:18:21,385 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 121 flow. Second operand 4 states and 109 transitions. [2024-11-12 16:18:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 118 flow [2024-11-12 16:18:21,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:18:21,386 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 50 flow [2024-11-12 16:18:21,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2024-11-12 16:18:21,386 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, -28 predicate places. [2024-11-12 16:18:21,386 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 50 flow [2024-11-12 16:18:21,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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) [2024-11-12 16:18:21,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:21,387 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-12 16:18:21,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:18:21,387 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-12 16:18:21,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1358941576, now seen corresponding path program 1 times [2024-11-12 16:18:21,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:21,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914183] [2024-11-12 16:18:21,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:21,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:21,412 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:21,442 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:21,442 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:21,443 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-12 16:18:21,447 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-11-12 16:18:21,447 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-11-12 16:18:21,447 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2024-11-12 16:18:21,447 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2024-11-12 16:18:21,448 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2024-11-12 16:18:21,449 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2024-11-12 16:18:21,449 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-11-12 16:18:21,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:18:21,449 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-12 16:18:21,453 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:21,453 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-12 16:18:21,471 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:18:21,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 87 transitions, 190 flow [2024-11-12 16:18:21,486 INFO L124 PetriNetUnfolderBase]: 35/177 cut-off events. [2024-11-12 16:18:21,486 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2024-11-12 16:18:21,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 177 events. 35/177 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 763 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 108. Up to 9 conditions per place. [2024-11-12 16:18:21,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 87 transitions, 190 flow [2024-11-12 16:18:21,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 87 transitions, 190 flow [2024-11-12 16:18:21,492 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:21,494 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;@d822125, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:21,494 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-12 16:18:21,495 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:21,496 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:18:21,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:21,496 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:21,496 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:21,497 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 16:18:21,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash 507738, now seen corresponding path program 1 times [2024-11-12 16:18:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:21,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625838639] [2024-11-12 16:18:21,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:21,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:21,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625838639] [2024-11-12 16:18:21,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625838639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:21,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:21,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:21,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576716274] [2024-11-12 16:18:21,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:21,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:21,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:21,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:21,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2024-11-12 16:18:21,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2024-11-12 16:18:21,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:21,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2024-11-12 16:18:21,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:22,146 INFO L124 PetriNetUnfolderBase]: 3201/6416 cut-off events. [2024-11-12 16:18:22,147 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-12 16:18:22,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11544 conditions, 6416 events. 3201/6416 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 49988 event pairs, 2688 based on Foata normal form. 1446/7476 useless extension candidates. Maximal degree in co-relation 8154. Up to 4555 conditions per place. [2024-11-12 16:18:22,179 INFO L140 encePairwiseOnDemand]: 69/87 looper letters, 57 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2024-11-12 16:18:22,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 304 flow [2024-11-12 16:18:22,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-11-12 16:18:22,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6168582375478927 [2024-11-12 16:18:22,183 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 190 flow. Second operand 3 states and 161 transitions. [2024-11-12 16:18:22,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 304 flow [2024-11-12 16:18:22,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:22,186 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 158 flow [2024-11-12 16:18:22,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-11-12 16:18:22,187 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2024-11-12 16:18:22,188 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 158 flow [2024-11-12 16:18:22,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2024-11-12 16:18:22,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:22,188 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:22,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:18:22,188 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 16:18:22,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:22,189 INFO L85 PathProgramCache]: Analyzing trace with hash 507739, now seen corresponding path program 1 times [2024-11-12 16:18:22,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:22,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73499395] [2024-11-12 16:18:22,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:22,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:22,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:22,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73499395] [2024-11-12 16:18:22,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73499395] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:22,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:22,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:22,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507393525] [2024-11-12 16:18:22,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:22,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:22,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:22,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 87 [2024-11-12 16:18:22,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2024-11-12 16:18:22,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:22,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 87 [2024-11-12 16:18:22,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:22,737 INFO L124 PetriNetUnfolderBase]: 3038/6160 cut-off events. [2024-11-12 16:18:22,737 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-11-12 16:18:22,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11114 conditions, 6160 events. 3038/6160 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 47393 event pairs, 2651 based on Foata normal form. 1/5757 useless extension candidates. Maximal degree in co-relation 9820. Up to 4789 conditions per place. [2024-11-12 16:18:22,761 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 50 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-11-12 16:18:22,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 282 flow [2024-11-12 16:18:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-11-12 16:18:22,763 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-11-12 16:18:22,763 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 158 flow. Second operand 3 states and 141 transitions. [2024-11-12 16:18:22,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 282 flow [2024-11-12 16:18:22,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:18:22,766 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 168 flow [2024-11-12 16:18:22,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-11-12 16:18:22,767 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-12 16:18:22,767 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 168 flow [2024-11-12 16:18:22,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2024-11-12 16:18:22,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:22,767 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:22,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:18:22,767 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 16:18:22,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash 771360588, now seen corresponding path program 1 times [2024-11-12 16:18:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:22,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805797603] [2024-11-12 16:18:22,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:22,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:22,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:22,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805797603] [2024-11-12 16:18:22,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805797603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:22,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:22,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:22,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837918150] [2024-11-12 16:18:22,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:22,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:18:22,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:22,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:18:22,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:18:22,868 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 87 [2024-11-12 16:18:22,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 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) [2024-11-12 16:18:22,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:22,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 87 [2024-11-12 16:18:22,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:23,318 INFO L124 PetriNetUnfolderBase]: 2915/5738 cut-off events. [2024-11-12 16:18:23,318 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2024-11-12 16:18:23,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10543 conditions, 5738 events. 2915/5738 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 43512 event pairs, 348 based on Foata normal form. 99/5566 useless extension candidates. Maximal degree in co-relation 9289. Up to 3679 conditions per place. [2024-11-12 16:18:23,345 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 81 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2024-11-12 16:18:23,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 422 flow [2024-11-12 16:18:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:18:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:18:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-11-12 16:18:23,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5241379310344828 [2024-11-12 16:18:23,347 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 168 flow. Second operand 5 states and 228 transitions. [2024-11-12 16:18:23,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 422 flow [2024-11-12 16:18:23,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:18:23,349 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 179 flow [2024-11-12 16:18:23,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-11-12 16:18:23,350 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2024-11-12 16:18:23,350 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 179 flow [2024-11-12 16:18:23,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 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) [2024-11-12 16:18:23,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:23,350 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:18:23,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:18:23,351 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 16:18:23,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash -865737477, now seen corresponding path program 1 times [2024-11-12 16:18:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:23,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038023903] [2024-11-12 16:18:23,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:23,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:23,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038023903] [2024-11-12 16:18:23,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038023903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:23,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:23,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:23,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701228888] [2024-11-12 16:18:23,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:23,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:18:23,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:23,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:18:23,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:18:23,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 87 [2024-11-12 16:18:23,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-12 16:18:23,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:23,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 87 [2024-11-12 16:18:23,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:24,117 INFO L124 PetriNetUnfolderBase]: 4741/9210 cut-off events. [2024-11-12 16:18:24,117 INFO L125 PetriNetUnfolderBase]: For 932/932 co-relation queries the response was YES. [2024-11-12 16:18:24,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17272 conditions, 9210 events. 4741/9210 cut-off events. For 932/932 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 69286 event pairs, 1594 based on Foata normal form. 0/8461 useless extension candidates. Maximal degree in co-relation 13274. Up to 3661 conditions per place. [2024-11-12 16:18:24,166 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 119 selfloop transitions, 7 changer transitions 0/152 dead transitions. [2024-11-12 16:18:24,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 152 transitions, 631 flow [2024-11-12 16:18:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:18:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:18:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 269 transitions. [2024-11-12 16:18:24,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6183908045977011 [2024-11-12 16:18:24,167 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 179 flow. Second operand 5 states and 269 transitions. [2024-11-12 16:18:24,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 152 transitions, 631 flow [2024-11-12 16:18:24,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 152 transitions, 614 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-12 16:18:24,250 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 219 flow [2024-11-12 16:18:24,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-11-12 16:18:24,252 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 7 predicate places. [2024-11-12 16:18:24,253 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 219 flow [2024-11-12 16:18:24,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-12 16:18:24,253 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:24,253 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-12 16:18:24,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:18:24,253 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 16:18:24,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash 234291792, now seen corresponding path program 1 times [2024-11-12 16:18:24,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:24,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260021656] [2024-11-12 16:18:24,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:24,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:24,276 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:24,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:24,295 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:24,296 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-11-12 16:18:24,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2024-11-12 16:18:24,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2024-11-12 16:18:24,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2024-11-12 16:18:24,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2024-11-12 16:18:24,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2024-11-12 16:18:24,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2024-11-12 16:18:24,297 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2024-11-12 16:18:24,297 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2024-11-12 16:18:24,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:18:24,298 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-12 16:18:24,299 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:24,299 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-12 16:18:24,323 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:18:24,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 109 transitions, 245 flow [2024-11-12 16:18:24,342 INFO L124 PetriNetUnfolderBase]: 52/271 cut-off events. [2024-11-12 16:18:24,342 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2024-11-12 16:18:24,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 271 events. 52/271 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1253 event pairs, 1 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 188. Up to 12 conditions per place. [2024-11-12 16:18:24,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 109 transitions, 245 flow [2024-11-12 16:18:24,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 109 transitions, 245 flow [2024-11-12 16:18:24,347 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:24,347 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;@d822125, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:24,347 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-12 16:18:24,350 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:24,350 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:18:24,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:24,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:24,350 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:24,350 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-11-12 16:18:24,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:24,351 INFO L85 PathProgramCache]: Analyzing trace with hash 615975, now seen corresponding path program 1 times [2024-11-12 16:18:24,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:24,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737404100] [2024-11-12 16:18:24,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:24,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:24,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:24,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737404100] [2024-11-12 16:18:24,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737404100] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:24,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:24,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823869844] [2024-11-12 16:18:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:24,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:24,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 109 [2024-11-12 16:18:24,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 109 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2024-11-12 16:18:24,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:24,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 109 [2024-11-12 16:18:24,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:29,382 INFO L124 PetriNetUnfolderBase]: 44624/74164 cut-off events. [2024-11-12 16:18:29,383 INFO L125 PetriNetUnfolderBase]: For 1078/1078 co-relation queries the response was YES. [2024-11-12 16:18:29,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136836 conditions, 74164 events. 44624/74164 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 2207. Compared 672218 event pairs, 38073 based on Foata normal form. 18973/89419 useless extension candidates. Maximal degree in co-relation 42401. Up to 55214 conditions per place. [2024-11-12 16:18:29,801 INFO L140 encePairwiseOnDemand]: 87/109 looper letters, 75 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2024-11-12 16:18:29,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 110 transitions, 401 flow [2024-11-12 16:18:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2024-11-12 16:18:29,803 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.636085626911315 [2024-11-12 16:18:29,803 INFO L175 Difference]: Start difference. First operand has 93 places, 109 transitions, 245 flow. Second operand 3 states and 208 transitions. [2024-11-12 16:18:29,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 110 transitions, 401 flow [2024-11-12 16:18:29,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 110 transitions, 401 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:29,807 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 203 flow [2024-11-12 16:18:29,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2024-11-12 16:18:29,809 INFO L279 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2024-11-12 16:18:29,810 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 203 flow [2024-11-12 16:18:29,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2024-11-12 16:18:29,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:29,810 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:29,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:18:29,810 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-11-12 16:18:29,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:29,811 INFO L85 PathProgramCache]: Analyzing trace with hash 615976, now seen corresponding path program 1 times [2024-11-12 16:18:29,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:29,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838432640] [2024-11-12 16:18:29,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:29,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:29,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:29,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838432640] [2024-11-12 16:18:29,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838432640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:29,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:29,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:29,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571586979] [2024-11-12 16:18:29,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:29,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:29,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:29,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:29,869 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 109 [2024-11-12 16:18:29,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2024-11-12 16:18:29,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:29,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 109 [2024-11-12 16:18:29,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:33,867 INFO L124 PetriNetUnfolderBase]: 42221/71131 cut-off events. [2024-11-12 16:18:33,867 INFO L125 PetriNetUnfolderBase]: For 2055/2065 co-relation queries the response was YES. [2024-11-12 16:18:34,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131389 conditions, 71131 events. 42221/71131 cut-off events. For 2055/2065 co-relation queries the response was YES. Maximal size of possible extension queue 2097. Compared 648351 event pairs, 26281 based on Foata normal form. 1/67430 useless extension candidates. Maximal degree in co-relation 115412. Up to 58588 conditions per place. [2024-11-12 16:18:34,294 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 60 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-11-12 16:18:34,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 347 flow [2024-11-12 16:18:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2024-11-12 16:18:34,296 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5259938837920489 [2024-11-12 16:18:34,296 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 203 flow. Second operand 3 states and 172 transitions. [2024-11-12 16:18:34,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 347 flow [2024-11-12 16:18:34,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 343 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:18:34,356 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 213 flow [2024-11-12 16:18:34,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2024-11-12 16:18:34,357 INFO L279 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2024-11-12 16:18:34,357 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 213 flow [2024-11-12 16:18:34,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2024-11-12 16:18:34,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:34,357 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:34,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:18:34,358 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-11-12 16:18:34,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1950206533, now seen corresponding path program 1 times [2024-11-12 16:18:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:34,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94768351] [2024-11-12 16:18:34,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:34,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:34,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94768351] [2024-11-12 16:18:34,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94768351] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:34,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:34,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:34,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461443889] [2024-11-12 16:18:34,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:34,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:18:34,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:18:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:18:34,479 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 109 [2024-11-12 16:18:34,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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) [2024-11-12 16:18:34,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:34,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 109 [2024-11-12 16:18:34,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:38,705 INFO L124 PetriNetUnfolderBase]: 42098/70270 cut-off events. [2024-11-12 16:18:38,705 INFO L125 PetriNetUnfolderBase]: For 3786/3786 co-relation queries the response was YES. [2024-11-12 16:18:38,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130937 conditions, 70270 events. 42098/70270 cut-off events. For 3786/3786 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 640023 event pairs, 4607 based on Foata normal form. 828/68169 useless extension candidates. Maximal degree in co-relation 130861. Up to 47434 conditions per place. [2024-11-12 16:18:39,080 INFO L140 encePairwiseOnDemand]: 104/109 looper letters, 107 selfloop transitions, 5 changer transitions 0/145 dead transitions. [2024-11-12 16:18:39,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 145 transitions, 551 flow [2024-11-12 16:18:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:18:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:18:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 289 transitions. [2024-11-12 16:18:39,081 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5302752293577981 [2024-11-12 16:18:39,081 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 213 flow. Second operand 5 states and 289 transitions. [2024-11-12 16:18:39,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 145 transitions, 551 flow [2024-11-12 16:18:39,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 145 transitions, 549 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:18:39,086 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 224 flow [2024-11-12 16:18:39,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-11-12 16:18:39,087 INFO L279 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2024-11-12 16:18:39,087 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 224 flow [2024-11-12 16:18:39,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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) [2024-11-12 16:18:39,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:39,087 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:18:39,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:18:39,087 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-11-12 16:18:39,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2029379279, now seen corresponding path program 1 times [2024-11-12 16:18:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:39,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342386619] [2024-11-12 16:18:39,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:39,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:39,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342386619] [2024-11-12 16:18:39,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342386619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:39,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:39,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:39,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973303165] [2024-11-12 16:18:39,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:39,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:18:39,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:39,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:18:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:18:39,145 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 109 [2024-11-12 16:18:39,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2024-11-12 16:18:39,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:39,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 109 [2024-11-12 16:18:39,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:46,547 INFO L124 PetriNetUnfolderBase]: 68744/113395 cut-off events. [2024-11-12 16:18:46,547 INFO L125 PetriNetUnfolderBase]: For 10132/10132 co-relation queries the response was YES. [2024-11-12 16:18:47,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215219 conditions, 113395 events. 68744/113395 cut-off events. For 10132/10132 co-relation queries the response was YES. Maximal size of possible extension queue 2173. Compared 1024840 event pairs, 22552 based on Foata normal form. 0/105976 useless extension candidates. Maximal degree in co-relation 61470. Up to 47254 conditions per place. [2024-11-12 16:18:47,345 INFO L140 encePairwiseOnDemand]: 103/109 looper letters, 157 selfloop transitions, 7 changer transitions 0/197 dead transitions. [2024-11-12 16:18:47,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 197 transitions, 824 flow [2024-11-12 16:18:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:18:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:18:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2024-11-12 16:18:47,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6275229357798165 [2024-11-12 16:18:47,347 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 224 flow. Second operand 5 states and 342 transitions. [2024-11-12 16:18:47,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 197 transitions, 824 flow [2024-11-12 16:18:47,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 197 transitions, 807 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-12 16:18:47,358 INFO L231 Difference]: Finished difference. Result has 99 places, 92 transitions, 264 flow [2024-11-12 16:18:47,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=99, PETRI_TRANSITIONS=92} [2024-11-12 16:18:47,362 INFO L279 CegarLoopForPetriNet]: 93 programPoint places, 6 predicate places. [2024-11-12 16:18:47,362 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 92 transitions, 264 flow [2024-11-12 16:18:47,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2024-11-12 16:18:47,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:47,363 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:18:47,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:18:47,364 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-11-12 16:18:47,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash -937932884, now seen corresponding path program 1 times [2024-11-12 16:18:47,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:47,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807374274] [2024-11-12 16:18:47,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:47,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:47,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:47,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807374274] [2024-11-12 16:18:47,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807374274] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:47,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:47,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:47,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799852354] [2024-11-12 16:18:47,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:47,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:47,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:47,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:47,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 109 [2024-11-12 16:18:47,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 92 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-11-12 16:18:47,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:47,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 109 [2024-11-12 16:18:47,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:56,772 INFO L124 PetriNetUnfolderBase]: 89926/148738 cut-off events. [2024-11-12 16:18:56,773 INFO L125 PetriNetUnfolderBase]: For 36429/38526 co-relation queries the response was YES. [2024-11-12 16:18:57,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303616 conditions, 148738 events. 89926/148738 cut-off events. For 36429/38526 co-relation queries the response was YES. Maximal size of possible extension queue 3411. Compared 1424605 event pairs, 55844 based on Foata normal form. 0/141612 useless extension candidates. Maximal degree in co-relation 250442. Up to 86569 conditions per place. [2024-11-12 16:18:57,865 INFO L140 encePairwiseOnDemand]: 106/109 looper letters, 95 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2024-11-12 16:18:57,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 132 transitions, 564 flow [2024-11-12 16:18:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-11-12 16:18:57,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6116207951070336 [2024-11-12 16:18:57,867 INFO L175 Difference]: Start difference. First operand has 99 places, 92 transitions, 264 flow. Second operand 3 states and 200 transitions. [2024-11-12 16:18:57,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 132 transitions, 564 flow [2024-11-12 16:18:57,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 132 transitions, 564 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:57,924 INFO L231 Difference]: Finished difference. Result has 102 places, 93 transitions, 276 flow [2024-11-12 16:18:57,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2024-11-12 16:18:57,924 INFO L279 CegarLoopForPetriNet]: 93 programPoint places, 9 predicate places. [2024-11-12 16:18:57,925 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 276 flow [2024-11-12 16:18:57,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-11-12 16:18:57,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:57,925 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-12 16:18:57,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-12 16:18:57,925 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2024-11-12 16:18:57,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash -317673135, now seen corresponding path program 1 times [2024-11-12 16:18:57,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:57,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236962088] [2024-11-12 16:18:57,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:57,938 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:57,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:57,950 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:57,950 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-11-12 16:18:57,951 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-11-12 16:18:57,951 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-11-12 16:18:57,951 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2024-11-12 16:18:57,951 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2024-11-12 16:18:57,951 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2024-11-12 16:18:57,951 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2024-11-12 16:18:57,952 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2024-11-12 16:18:57,952 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2024-11-12 16:18:57,952 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-11-12 16:18:57,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:18:57,952 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-12 16:18:57,953 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:57,953 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-12 16:18:57,973 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-12 16:18:57,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 131 transitions, 302 flow [2024-11-12 16:18:57,997 INFO L124 PetriNetUnfolderBase]: 77/409 cut-off events. [2024-11-12 16:18:57,997 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2024-11-12 16:18:58,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 409 events. 77/409 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2087 event pairs, 6 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 295. Up to 32 conditions per place. [2024-11-12 16:18:58,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 131 transitions, 302 flow [2024-11-12 16:18:58,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 131 transitions, 302 flow [2024-11-12 16:18:58,004 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:58,004 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;@d822125, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:58,004 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-12 16:18:58,005 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:58,005 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:18:58,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:58,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:58,006 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:58,006 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-12 16:18:58,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:58,006 INFO L85 PathProgramCache]: Analyzing trace with hash 746058, now seen corresponding path program 1 times [2024-11-12 16:18:58,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:58,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558077681] [2024-11-12 16:18:58,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:58,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:58,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558077681] [2024-11-12 16:18:58,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558077681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:58,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:58,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:58,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134815779] [2024-11-12 16:18:58,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:58,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:58,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:58,046 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 131 [2024-11-12 16:18:58,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2024-11-12 16:18:58,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:58,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 131 [2024-11-12 16:18:58,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand