./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:35:40,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:35:40,684 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:35:40,691 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:35:40,691 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:35:40,722 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:35:40,723 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:35:40,723 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:35:40,724 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:35:40,724 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:35:40,725 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:35:40,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:35:40,726 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:35:40,728 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:35:40,728 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:35:40,729 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:35:40,729 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:35:40,729 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:35:40,729 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:35:40,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:35:40,730 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:35:40,734 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:35:40,734 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:35:40,734 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:35:40,734 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:35:40,735 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:35:40,735 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:35:40,735 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:35:40,735 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:35:40,736 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:35:40,736 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:35:40,736 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:35:40,736 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:35:40,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:35:40,737 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:35:40,737 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:35:40,737 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:35:40,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:35:40,737 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:35:40,738 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:35:40,738 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:35:40,739 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:35:40,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2024-11-20 17:35:40,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:35:40,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:35:40,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:35:40,991 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:35:40,991 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:35:40,992 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-11-20 17:35:42,413 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:35:42,684 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:35:42,685 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-11-20 17:35:42,705 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1581ab37f/25ab261852b24b829e990278ef217ad8/FLAG6f916125c [2024-11-20 17:35:42,724 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1581ab37f/25ab261852b24b829e990278ef217ad8 [2024-11-20 17:35:42,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:35:42,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:35:42,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:35:42,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:35:42,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:35:42,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:35:42" (1/1) ... [2024-11-20 17:35:42,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678f902b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:42, skipping insertion in model container [2024-11-20 17:35:42,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:35:42" (1/1) ... [2024-11-20 17:35:42,785 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:35:43,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:35:43,227 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:35:43,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:35:43,317 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:35:43,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43 WrapperNode [2024-11-20 17:35:43,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:35:43,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:35:43,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:35:43,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:35:43,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,373 INFO L138 Inliner]: procedures = 170, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-11-20 17:35:43,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:35:43,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:35:43,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:35:43,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:35:43,385 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,387 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,408 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 6, 5]. 33 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-11-20 17:35:43,411 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,411 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,426 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,431 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,432 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,439 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:35:43,440 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:35:43,440 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:35:43,440 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:35:43,441 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (1/1) ... [2024-11-20 17:35:43,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:35:43,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:35:43,477 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) [2024-11-20 17:35:43,484 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 [2024-11-20 17:35:43,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:35:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:35:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 17:35:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-20 17:35:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:35:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:35:43,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 17:35:43,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-20 17:35:43,530 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-20 17:35:43,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:35:43,530 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-20 17:35:43,532 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-20 17:35:43,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:35:43,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:35:43,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 17:35:43,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-20 17:35:43,533 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-20 17:35:43,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:35:43,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:35:43,535 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:35:43,669 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:35:43,673 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:35:43,899 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:35:43,900 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:35:44,060 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:35:44,060 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-20 17:35:44,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:35:44 BoogieIcfgContainer [2024-11-20 17:35:44,062 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:35:44,064 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:35:44,065 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:35:44,068 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:35:44,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:35:42" (1/3) ... [2024-11-20 17:35:44,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12eba661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:35:44, skipping insertion in model container [2024-11-20 17:35:44,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:43" (2/3) ... [2024-11-20 17:35:44,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12eba661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:35:44, skipping insertion in model container [2024-11-20 17:35:44,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:35:44" (3/3) ... [2024-11-20 17:35:44,071 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2024-11-20 17:35:44,087 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:35:44,088 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-20 17:35:44,088 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:35:44,131 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:35:44,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 67 transitions, 138 flow [2024-11-20 17:35:44,219 INFO L124 PetriNetUnfolderBase]: 14/95 cut-off events. [2024-11-20 17:35:44,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:35:44,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 95 events. 14/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 362 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2024-11-20 17:35:44,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 67 transitions, 138 flow [2024-11-20 17:35:44,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 67 transitions, 138 flow [2024-11-20 17:35:44,245 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:35:44,255 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;@12397bdb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:35:44,256 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-20 17:35:44,260 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:35:44,260 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-20 17:35:44,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:35:44,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:44,261 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:35:44,262 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:35:44,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:44,267 INFO L85 PathProgramCache]: Analyzing trace with hash 326786, now seen corresponding path program 1 times [2024-11-20 17:35:44,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:44,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087341626] [2024-11-20 17:35:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:44,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:44,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087341626] [2024-11-20 17:35:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087341626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:44,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:44,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:44,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399423389] [2024-11-20 17:35:44,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:44,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:44,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:44,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:44,619 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2024-11-20 17:35:44,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 67 transitions, 138 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) [2024-11-20 17:35:44,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:44,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2024-11-20 17:35:44,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:44,866 INFO L124 PetriNetUnfolderBase]: 154/487 cut-off events. [2024-11-20 17:35:44,867 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:35:44,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 487 events. 154/487 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2770 event pairs, 0 based on Foata normal form. 94/532 useless extension candidates. Maximal degree in co-relation 804. Up to 323 conditions per place. [2024-11-20 17:35:44,876 INFO L140 encePairwiseOnDemand]: 53/67 looper letters, 38 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-20 17:35:44,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 222 flow [2024-11-20 17:35:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:35:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:35:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-11-20 17:35:44,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7213930348258707 [2024-11-20 17:35:44,888 INFO L175 Difference]: Start difference. First operand has 60 places, 67 transitions, 138 flow. Second operand 3 states and 145 transitions. [2024-11-20 17:35:44,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 222 flow [2024-11-20 17:35:44,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:35:44,895 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 126 flow [2024-11-20 17:35:44,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-11-20 17:35:44,902 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-20 17:35:44,904 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 126 flow [2024-11-20 17:35:44,905 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) [2024-11-20 17:35:44,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:44,905 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-20 17:35:44,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:35:44,907 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:35:44,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:44,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1158310178, now seen corresponding path program 1 times [2024-11-20 17:35:44,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:44,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502606076] [2024-11-20 17:35:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:44,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:45,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:45,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502606076] [2024-11-20 17:35:45,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502606076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:35:45,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811014504] [2024-11-20 17:35:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:45,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:35:45,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:35:45,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:35:45,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:35:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:45,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 17:35:45,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:35:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:45,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:35:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:45,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811014504] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:35:45,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:35:45,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-20 17:35:45,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738286558] [2024-11-20 17:35:45,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:35:45,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:35:45,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:35:45,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:35:45,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2024-11-20 17:35:45,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 126 flow. Second operand has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 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) [2024-11-20 17:35:45,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:45,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2024-11-20 17:35:45,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:45,347 INFO L124 PetriNetUnfolderBase]: 33/114 cut-off events. [2024-11-20 17:35:45,349 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-20 17:35:45,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 114 events. 33/114 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 326 event pairs, 0 based on Foata normal form. 24/130 useless extension candidates. Maximal degree in co-relation 202. Up to 69 conditions per place. [2024-11-20 17:35:45,352 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 27 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-11-20 17:35:45,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 164 flow [2024-11-20 17:35:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:35:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:35:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-11-20 17:35:45,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5485074626865671 [2024-11-20 17:35:45,355 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 126 flow. Second operand 4 states and 147 transitions. [2024-11-20 17:35:45,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 164 flow [2024-11-20 17:35:45,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:35:45,357 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 78 flow [2024-11-20 17:35:45,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-11-20 17:35:45,360 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -19 predicate places. [2024-11-20 17:35:45,360 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 78 flow [2024-11-20 17:35:45,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 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) [2024-11-20 17:35:45,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:45,361 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-20 17:35:45,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:35:45,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:35:45,563 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-20 17:35:45,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1547877551, now seen corresponding path program 1 times [2024-11-20 17:35:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:45,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095412062] [2024-11-20 17:35:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:35:45,592 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:35:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:35:45,617 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:35:45,618 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:35:45,619 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2024-11-20 17:35:45,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (20 of 22 remaining) [2024-11-20 17:35:45,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2024-11-20 17:35:45,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2024-11-20 17:35:45,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (17 of 22 remaining) [2024-11-20 17:35:45,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (16 of 22 remaining) [2024-11-20 17:35:45,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2024-11-20 17:35:45,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2024-11-20 17:35:45,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2024-11-20 17:35:45,623 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2024-11-20 17:35:45,623 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2024-11-20 17:35:45,623 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2024-11-20 17:35:45,623 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2024-11-20 17:35:45,623 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2024-11-20 17:35:45,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2024-11-20 17:35:45,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2024-11-20 17:35:45,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2024-11-20 17:35:45,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2024-11-20 17:35:45,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2024-11-20 17:35:45,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2024-11-20 17:35:45,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2024-11-20 17:35:45,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2024-11-20 17:35:45,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:35:45,627 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-20 17:35:45,630 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:35:45,630 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-20 17:35:45,665 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:35:45,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 216 flow [2024-11-20 17:35:45,688 INFO L124 PetriNetUnfolderBase]: 24/160 cut-off events. [2024-11-20 17:35:45,688 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:35:45,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 160 events. 24/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 727 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 99. Up to 6 conditions per place. [2024-11-20 17:35:45,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 216 flow [2024-11-20 17:35:45,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 103 transitions, 216 flow [2024-11-20 17:35:45,695 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:35:45,699 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;@12397bdb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:35:45,699 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-20 17:35:45,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:35:45,701 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-20 17:35:45,701 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:35:45,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:45,701 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:35:45,701 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-20 17:35:45,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:45,702 INFO L85 PathProgramCache]: Analyzing trace with hash 429065, now seen corresponding path program 1 times [2024-11-20 17:35:45,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:45,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105839440] [2024-11-20 17:35:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:45,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:45,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:45,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105839440] [2024-11-20 17:35:45,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105839440] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:45,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:45,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:45,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346534381] [2024-11-20 17:35:45,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:45,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:45,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:45,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 103 [2024-11-20 17:35:45,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2024-11-20 17:35:45,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:45,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 103 [2024-11-20 17:35:45,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:46,773 INFO L124 PetriNetUnfolderBase]: 3982/8767 cut-off events. [2024-11-20 17:35:46,773 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-20 17:35:46,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15134 conditions, 8767 events. 3982/8767 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 76087 event pairs, 1848 based on Foata normal form. 1954/9916 useless extension candidates. Maximal degree in co-relation 1217. Up to 6311 conditions per place. [2024-11-20 17:35:46,838 INFO L140 encePairwiseOnDemand]: 83/103 looper letters, 51 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2024-11-20 17:35:46,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 316 flow [2024-11-20 17:35:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:35:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:35:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2024-11-20 17:35:46,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7055016181229773 [2024-11-20 17:35:46,844 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 216 flow. Second operand 3 states and 218 transitions. [2024-11-20 17:35:46,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 316 flow [2024-11-20 17:35:46,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 100 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:35:46,847 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 196 flow [2024-11-20 17:35:46,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, 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=196, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-11-20 17:35:46,849 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2024-11-20 17:35:46,850 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 196 flow [2024-11-20 17:35:46,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2024-11-20 17:35:46,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:46,851 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-20 17:35:46,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:35:46,851 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-20 17:35:46,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:46,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1130047462, now seen corresponding path program 1 times [2024-11-20 17:35:46,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:46,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915667107] [2024-11-20 17:35:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:46,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:46,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915667107] [2024-11-20 17:35:46,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915667107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:35:46,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011993441] [2024-11-20 17:35:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:46,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:35:46,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:35:46,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:35:46,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:35:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:46,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 17:35:46,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:35:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:47,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:35:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:47,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011993441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:35:47,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:35:47,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-20 17:35:47,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852605164] [2024-11-20 17:35:47,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:35:47,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:35:47,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:47,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:35:47,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:35:47,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 103 [2024-11-20 17:35:47,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 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) [2024-11-20 17:35:47,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:47,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 103 [2024-11-20 17:35:47,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:48,051 INFO L124 PetriNetUnfolderBase]: 3597/8118 cut-off events. [2024-11-20 17:35:48,051 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2024-11-20 17:35:48,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14139 conditions, 8118 events. 3597/8118 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 70269 event pairs, 1344 based on Foata normal form. 168/7774 useless extension candidates. Maximal degree in co-relation 1201. Up to 4081 conditions per place. [2024-11-20 17:35:48,116 INFO L140 encePairwiseOnDemand]: 99/103 looper letters, 94 selfloop transitions, 4 changer transitions 0/145 dead transitions. [2024-11-20 17:35:48,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 145 transitions, 506 flow [2024-11-20 17:35:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:35:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:35:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2024-11-20 17:35:48,119 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6524271844660194 [2024-11-20 17:35:48,120 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 196 flow. Second operand 5 states and 336 transitions. [2024-11-20 17:35:48,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 145 transitions, 506 flow [2024-11-20 17:35:48,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 145 transitions, 504 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:35:48,123 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 198 flow [2024-11-20 17:35:48,123 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2024-11-20 17:35:48,124 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 4 predicate places. [2024-11-20 17:35:48,124 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 198 flow [2024-11-20 17:35:48,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 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) [2024-11-20 17:35:48,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:48,125 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:35:48,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:35:48,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:35:48,329 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-20 17:35:48,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:48,330 INFO L85 PathProgramCache]: Analyzing trace with hash -466746453, now seen corresponding path program 1 times [2024-11-20 17:35:48,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:48,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044601806] [2024-11-20 17:35:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:48,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:48,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:48,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044601806] [2024-11-20 17:35:48,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044601806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:48,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:48,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:48,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265735132] [2024-11-20 17:35:48,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:48,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:48,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 103 [2024-11-20 17:35:48,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2024-11-20 17:35:48,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:48,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 103 [2024-11-20 17:35:48,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:49,138 INFO L124 PetriNetUnfolderBase]: 3597/7448 cut-off events. [2024-11-20 17:35:49,138 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2024-11-20 17:35:49,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13758 conditions, 7448 events. 3597/7448 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 59601 event pairs, 3597 based on Foata normal form. 0/7260 useless extension candidates. Maximal degree in co-relation 9975. Up to 5664 conditions per place. [2024-11-20 17:35:49,182 INFO L140 encePairwiseOnDemand]: 94/103 looper letters, 38 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2024-11-20 17:35:49,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 78 transitions, 260 flow [2024-11-20 17:35:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:35:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:35:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2024-11-20 17:35:49,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5372168284789643 [2024-11-20 17:35:49,186 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 198 flow. Second operand 3 states and 166 transitions. [2024-11-20 17:35:49,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 78 transitions, 260 flow [2024-11-20 17:35:49,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 78 transitions, 250 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-20 17:35:49,193 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 174 flow [2024-11-20 17:35:49,193 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2024-11-20 17:35:49,194 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2024-11-20 17:35:49,194 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 174 flow [2024-11-20 17:35:49,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2024-11-20 17:35:49,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:49,194 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:35:49,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:35:49,195 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-20 17:35:49,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash -466746452, now seen corresponding path program 1 times [2024-11-20 17:35:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:49,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993534957] [2024-11-20 17:35:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:49,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:49,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:49,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993534957] [2024-11-20 17:35:49,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993534957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:49,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:49,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:49,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572407450] [2024-11-20 17:35:49,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:49,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:49,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:49,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 103 [2024-11-20 17:35:49,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2024-11-20 17:35:49,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:49,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 103 [2024-11-20 17:35:49,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:35:49,988 INFO L124 PetriNetUnfolderBase]: 3597/7198 cut-off events. [2024-11-20 17:35:49,989 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2024-11-20 17:35:50,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13063 conditions, 7198 events. 3597/7198 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 55486 event pairs, 3597 based on Foata normal form. 0/7010 useless extension candidates. Maximal degree in co-relation 13054. Up to 5664 conditions per place. [2024-11-20 17:35:50,032 INFO L140 encePairwiseOnDemand]: 94/103 looper letters, 37 selfloop transitions, 1 changer transitions 1/70 dead transitions. [2024-11-20 17:35:50,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 70 transitions, 236 flow [2024-11-20 17:35:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:35:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:35:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2024-11-20 17:35:50,034 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5372168284789643 [2024-11-20 17:35:50,034 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 174 flow. Second operand 3 states and 166 transitions. [2024-11-20 17:35:50,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 70 transitions, 236 flow [2024-11-20 17:35:50,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 70 transitions, 235 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:35:50,035 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 157 flow [2024-11-20 17:35:50,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2024-11-20 17:35:50,038 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -12 predicate places. [2024-11-20 17:35:50,038 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 157 flow [2024-11-20 17:35:50,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2024-11-20 17:35:50,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:50,039 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-20 17:35:50,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:35:50,041 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-20 17:35:50,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash -779406151, now seen corresponding path program 1 times [2024-11-20 17:35:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:50,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377876040] [2024-11-20 17:35:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:50,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:35:50,059 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:35:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:35:50,074 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:35:50,077 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:35:50,078 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (29 of 30 remaining) [2024-11-20 17:35:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (28 of 30 remaining) [2024-11-20 17:35:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 30 remaining) [2024-11-20 17:35:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 30 remaining) [2024-11-20 17:35:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (25 of 30 remaining) [2024-11-20 17:35:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (24 of 30 remaining) [2024-11-20 17:35:50,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 30 remaining) [2024-11-20 17:35:50,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 30 remaining) [2024-11-20 17:35:50,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 30 remaining) [2024-11-20 17:35:50,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 30 remaining) [2024-11-20 17:35:50,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 30 remaining) [2024-11-20 17:35:50,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 30 remaining) [2024-11-20 17:35:50,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 30 remaining) [2024-11-20 17:35:50,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 30 remaining) [2024-11-20 17:35:50,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 30 remaining) [2024-11-20 17:35:50,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 30 remaining) [2024-11-20 17:35:50,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 30 remaining) [2024-11-20 17:35:50,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 30 remaining) [2024-11-20 17:35:50,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 30 remaining) [2024-11-20 17:35:50,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 30 remaining) [2024-11-20 17:35:50,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 30 remaining) [2024-11-20 17:35:50,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:35:50,082 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-20 17:35:50,084 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:35:50,086 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-20 17:35:50,112 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:35:50,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 139 transitions, 296 flow [2024-11-20 17:35:50,138 INFO L124 PetriNetUnfolderBase]: 34/225 cut-off events. [2024-11-20 17:35:50,139 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-20 17:35:50,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 225 events. 34/225 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1097 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 167. Up to 8 conditions per place. [2024-11-20 17:35:50,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 139 transitions, 296 flow [2024-11-20 17:35:50,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 139 transitions, 296 flow [2024-11-20 17:35:50,145 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:35:50,146 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;@12397bdb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:35:50,146 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-20 17:35:50,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:35:50,147 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-20 17:35:50,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:35:50,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:35:50,148 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:35:50,148 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:35:50,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:35:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash 567092, now seen corresponding path program 1 times [2024-11-20 17:35:50,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:35:50,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660296517] [2024-11-20 17:35:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:35:50,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:35:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:35:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:35:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:35:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660296517] [2024-11-20 17:35:50,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660296517] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:35:50,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:35:50,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:35:50,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566313091] [2024-11-20 17:35:50,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:35:50,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:35:50,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:35:50,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:35:50,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:35:50,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 139 [2024-11-20 17:35:50,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-11-20 17:35:50,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:35:50,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 139 [2024-11-20 17:35:50,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:01,102 INFO L124 PetriNetUnfolderBase]: 73678/131731 cut-off events. [2024-11-20 17:36:01,103 INFO L125 PetriNetUnfolderBase]: For 1308/1308 co-relation queries the response was YES. [2024-11-20 17:36:01,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234291 conditions, 131731 events. 73678/131731 cut-off events. For 1308/1308 co-relation queries the response was YES. Maximal size of possible extension queue 3133. Compared 1375690 event pairs, 47784 based on Foata normal form. 32590/153880 useless extension candidates. Maximal degree in co-relation 15204. Up to 101927 conditions per place. [2024-11-20 17:36:02,293 INFO L140 encePairwiseOnDemand]: 113/139 looper letters, 63 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2024-11-20 17:36:02,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 130 transitions, 408 flow [2024-11-20 17:36:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:36:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:36:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2024-11-20 17:36:02,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6954436450839329 [2024-11-20 17:36:02,295 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 296 flow. Second operand 3 states and 290 transitions. [2024-11-20 17:36:02,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 130 transitions, 408 flow [2024-11-20 17:36:02,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 130 transitions, 406 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-20 17:36:02,299 INFO L231 Difference]: Finished difference. Result has 126 places, 117 transitions, 262 flow [2024-11-20 17:36:02,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=126, PETRI_TRANSITIONS=117} [2024-11-20 17:36:02,300 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 2 predicate places. [2024-11-20 17:36:02,300 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 117 transitions, 262 flow [2024-11-20 17:36:02,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-11-20 17:36:02,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:02,301 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-20 17:36:02,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:36:02,301 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:36:02,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash -242816690, now seen corresponding path program 1 times [2024-11-20 17:36:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:02,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902216721] [2024-11-20 17:36:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:02,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:02,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:02,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902216721] [2024-11-20 17:36:02,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902216721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:36:02,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116619324] [2024-11-20 17:36:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:02,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:02,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:36:02,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:36:02,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:36:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:02,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 17:36:02,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:36:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:02,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:36:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:02,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116619324] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:36:02,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:36:02,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-20 17:36:02,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117763727] [2024-11-20 17:36:02,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:36:02,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:36:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:36:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:36:02,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 139 [2024-11-20 17:36:02,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 117 transitions, 262 flow. Second operand has 7 states, 7 states have (on average 67.42857142857143) internal successors, (472), 7 states have internal predecessors, (472), 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) [2024-11-20 17:36:02,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:02,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 139 [2024-11-20 17:36:02,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:11,651 INFO L124 PetriNetUnfolderBase]: 68541/123270 cut-off events. [2024-11-20 17:36:11,651 INFO L125 PetriNetUnfolderBase]: For 7331/7331 co-relation queries the response was YES. [2024-11-20 17:36:12,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222316 conditions, 123270 events. 68541/123270 cut-off events. For 7331/7331 co-relation queries the response was YES. Maximal size of possible extension queue 2966. Compared 1301105 event pairs, 5016 based on Foata normal form. 1896/120334 useless extension candidates. Maximal degree in co-relation 18885. Up to 68881 conditions per place. [2024-11-20 17:36:12,597 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 152 selfloop transitions, 6 changer transitions 0/223 dead transitions. [2024-11-20 17:36:12,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 223 transitions, 792 flow [2024-11-20 17:36:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:36:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:36:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 552 transitions. [2024-11-20 17:36:12,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6618705035971223 [2024-11-20 17:36:12,600 INFO L175 Difference]: Start difference. First operand has 126 places, 117 transitions, 262 flow. Second operand 6 states and 552 transitions. [2024-11-20 17:36:12,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 223 transitions, 792 flow [2024-11-20 17:36:12,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 223 transitions, 790 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:36:12,610 INFO L231 Difference]: Finished difference. Result has 129 places, 118 transitions, 276 flow [2024-11-20 17:36:12,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=276, PETRI_PLACES=129, PETRI_TRANSITIONS=118} [2024-11-20 17:36:12,611 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 5 predicate places. [2024-11-20 17:36:12,613 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 118 transitions, 276 flow [2024-11-20 17:36:12,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.42857142857143) internal successors, (472), 7 states have internal predecessors, (472), 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) [2024-11-20 17:36:12,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:12,614 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:36:12,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 17:36:12,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:36:12,815 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:36:12,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 485415385, now seen corresponding path program 1 times [2024-11-20 17:36:12,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:12,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985495444] [2024-11-20 17:36:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:12,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:12,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985495444] [2024-11-20 17:36:12,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985495444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:12,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:36:12,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:36:12,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53344288] [2024-11-20 17:36:12,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:12,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:36:12,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:12,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:36:12,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:36:12,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 139 [2024-11-20 17:36:12,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 118 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2024-11-20 17:36:12,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:12,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 139 [2024-11-20 17:36:12,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:36:21,559 INFO L124 PetriNetUnfolderBase]: 68541/116720 cut-off events. [2024-11-20 17:36:21,559 INFO L125 PetriNetUnfolderBase]: For 11606/11606 co-relation queries the response was YES. [2024-11-20 17:36:21,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219511 conditions, 116720 events. 68541/116720 cut-off events. For 11606/11606 co-relation queries the response was YES. Maximal size of possible extension queue 2644. Compared 1127994 event pairs, 68541 based on Foata normal form. 0/114279 useless extension candidates. Maximal degree in co-relation 163031. Up to 94800 conditions per place. [2024-11-20 17:36:22,288 INFO L140 encePairwiseOnDemand]: 126/139 looper letters, 52 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2024-11-20 17:36:22,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 106 transitions, 358 flow [2024-11-20 17:36:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:36:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:36:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-11-20 17:36:22,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5371702637889688 [2024-11-20 17:36:22,290 INFO L175 Difference]: Start difference. First operand has 129 places, 118 transitions, 276 flow. Second operand 3 states and 224 transitions. [2024-11-20 17:36:22,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 106 transitions, 358 flow [2024-11-20 17:36:22,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 106 transitions, 343 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-20 17:36:22,296 INFO L231 Difference]: Finished difference. Result has 116 places, 106 transitions, 239 flow [2024-11-20 17:36:22,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=116, PETRI_TRANSITIONS=106} [2024-11-20 17:36:22,297 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, -8 predicate places. [2024-11-20 17:36:22,297 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 106 transitions, 239 flow [2024-11-20 17:36:22,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2024-11-20 17:36:22,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:36:22,298 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:36:22,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:36:22,298 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:36:22,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:36:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash 485415386, now seen corresponding path program 1 times [2024-11-20 17:36:22,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:36:22,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109691798] [2024-11-20 17:36:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:36:22,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:36:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:36:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:36:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:36:22,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109691798] [2024-11-20 17:36:22,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109691798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:36:22,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:36:22,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:36:22,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511671028] [2024-11-20 17:36:22,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:36:22,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:36:22,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:36:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:36:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:36:22,403 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 139 [2024-11-20 17:36:22,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 106 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2024-11-20 17:36:22,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:36:22,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 139 [2024-11-20 17:36:22,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand