./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../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 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_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.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:18:35,280 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:18:35,316 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:18:35,321 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:18:35,322 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:18:35,346 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:18:35,347 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:18:35,347 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:18:35,347 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:18:35,348 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:18:35,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:18:35,348 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:18:35,349 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:18:35,349 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:18:35,349 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:18:35,349 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:18:35,350 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:18:35,350 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:18:35,350 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:18:35,350 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:18:35,353 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:18:35,354 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:18:35,354 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:18:35,354 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:18:35,354 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:18:35,354 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:18:35,354 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:18:35,354 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:18:35,355 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:18:35,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:18:35,355 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:18:35,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:18:35,355 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:18:35,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:18:35,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:18:35,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:18:35,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:18:35,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:18:35,356 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:18:35,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:18:35,356 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:18:35,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:18:35,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2024-11-12 16:18:35,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:18:35,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:18:35,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:18:35,570 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:18:35,570 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:18:35,571 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-11-12 16:18:36,810 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:18:36,993 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:18:36,993 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-11-12 16:18:37,007 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a9f48b35/e5aaf0f6720d4af4aa8995cf87e231cf/FLAGf52ee2d2e [2024-11-12 16:18:37,017 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a9f48b35/e5aaf0f6720d4af4aa8995cf87e231cf [2024-11-12 16:18:37,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:18:37,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:18:37,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:18:37,021 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:18:37,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:18:37,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13eec92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37, skipping insertion in model container [2024-11-12 16:18:37,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,104 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:18:37,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:18:37,406 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:18:37,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:18:37,484 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:18:37,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37 WrapperNode [2024-11-12 16:18:37,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:18:37,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:18:37,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:18:37,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:18:37,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,527 INFO L138 Inliner]: procedures = 170, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-11-12 16:18:37,528 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:18:37,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:18:37,529 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:18:37,529 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:18:37,537 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,544 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,561 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]. [2024-11-12 16:18:37,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,562 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,568 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,575 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,578 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:18:37,578 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:18:37,578 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:18:37,578 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:18:37,579 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (1/1) ... [2024-11-12 16:18:37,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:18:37,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:18:37,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 16:18:37,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 16:18:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:18:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:18:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:18:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-12 16:18:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:18:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:18:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:18:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-12 16:18:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 16:18:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:18:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-12 16:18:37,654 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-12 16:18:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:18:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:18:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:18:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-12 16:18:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 16:18:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:18:37,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:18:37,657 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:18:37,764 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:18:37,765 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:18:37,923 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:18:37,923 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:18:38,050 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:18:38,050 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-12 16:18:38,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:18:38 BoogieIcfgContainer [2024-11-12 16:18:38,050 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:18:38,052 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:18:38,052 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:18:38,056 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:18:38,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:18:37" (1/3) ... [2024-11-12 16:18:38,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2559df06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:18:38, skipping insertion in model container [2024-11-12 16:18:38,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:37" (2/3) ... [2024-11-12 16:18:38,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2559df06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:18:38, skipping insertion in model container [2024-11-12 16:18:38,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:18:38" (3/3) ... [2024-11-12 16:18:38,060 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2024-11-12 16:18:38,072 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:18:38,072 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-12 16:18:38,072 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:18:38,107 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:18:38,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 67 transitions, 138 flow [2024-11-12 16:18:38,174 INFO L124 PetriNetUnfolderBase]: 14/95 cut-off events. [2024-11-12 16:18:38,174 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:38,180 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. [2024-11-12 16:18:38,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 67 transitions, 138 flow [2024-11-12 16:18:38,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 67 transitions, 138 flow [2024-11-12 16:18:38,197 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:38,202 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;@59449b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:38,203 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-12 16:18:38,206 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:38,206 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-12 16:18:38,206 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:38,207 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:38,207 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:38,207 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)] === [2024-11-12 16:18:38,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:38,213 INFO L85 PathProgramCache]: Analyzing trace with hash 326786, now seen corresponding path program 1 times [2024-11-12 16:18:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:38,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579681813] [2024-11-12 16:18:38,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:38,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:38,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579681813] [2024-11-12 16:18:38,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579681813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:38,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:38,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:38,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479385863] [2024-11-12 16:18:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:38,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:38,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:38,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:38,503 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2024-11-12 16:18:38,505 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) [2024-11-12 16:18:38,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:38,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2024-11-12 16:18:38,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:38,646 INFO L124 PetriNetUnfolderBase]: 154/487 cut-off events. [2024-11-12 16:18:38,648 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:38,650 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. [2024-11-12 16:18:38,653 INFO L140 encePairwiseOnDemand]: 53/67 looper letters, 38 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-12 16:18:38,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 222 flow [2024-11-12 16:18:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-11-12 16:18:38,665 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7213930348258707 [2024-11-12 16:18:38,666 INFO L175 Difference]: Start difference. First operand has 60 places, 67 transitions, 138 flow. Second operand 3 states and 145 transitions. [2024-11-12 16:18:38,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 222 flow [2024-11-12 16:18:38,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:38,673 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 126 flow [2024-11-12 16:18:38,674 INFO L262 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} [2024-11-12 16:18:38,677 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-12 16:18:38,677 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 126 flow [2024-11-12 16:18:38,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:38,677 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:38,677 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:38,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:18:38,678 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)] === [2024-11-12 16:18:38,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1158310178, now seen corresponding path program 1 times [2024-11-12 16:18:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:38,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63486191] [2024-11-12 16:18:38,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:38,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:38,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:38,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63486191] [2024-11-12 16:18:38,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63486191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:38,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:38,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:18:38,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072505222] [2024-11-12 16:18:38,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:38,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:18:38,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:38,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:18:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:18:38,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2024-11-12 16:18:38,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:38,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:38,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2024-11-12 16:18:38,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:38,854 INFO L124 PetriNetUnfolderBase]: 33/114 cut-off events. [2024-11-12 16:18:38,856 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-12 16:18:38,856 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. [2024-11-12 16:18:38,857 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 27 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-11-12 16:18:38,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 164 flow [2024-11-12 16:18:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:18:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:18:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-11-12 16:18:38,859 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485074626865671 [2024-11-12 16:18:38,860 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 126 flow. Second operand 4 states and 147 transitions. [2024-11-12 16:18:38,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 164 flow [2024-11-12 16:18:38,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:18:38,862 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 78 flow [2024-11-12 16:18:38,862 INFO L262 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} [2024-11-12 16:18:38,863 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -19 predicate places. [2024-11-12 16:18:38,863 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 78 flow [2024-11-12 16:18:38,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:38,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:38,864 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-12 16:18:38,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:18:38,865 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)] === [2024-11-12 16:18:38,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1547877551, now seen corresponding path program 1 times [2024-11-12 16:18:38,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:38,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295247169] [2024-11-12 16:18:38,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:38,889 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:38,919 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:38,919 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:38,921 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2024-11-12 16:18:38,922 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (20 of 22 remaining) [2024-11-12 16:18:38,924 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2024-11-12 16:18:38,924 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2024-11-12 16:18:38,924 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (17 of 22 remaining) [2024-11-12 16:18:38,925 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (16 of 22 remaining) [2024-11-12 16:18:38,925 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2024-11-12 16:18:38,925 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2024-11-12 16:18:38,926 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2024-11-12 16:18:38,926 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2024-11-12 16:18:38,926 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2024-11-12 16:18:38,926 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2024-11-12 16:18:38,926 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2024-11-12 16:18:38,927 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2024-11-12 16:18:38,927 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2024-11-12 16:18:38,927 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2024-11-12 16:18:38,927 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2024-11-12 16:18:38,928 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2024-11-12 16:18:38,928 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2024-11-12 16:18:38,928 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2024-11-12 16:18:38,928 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2024-11-12 16:18:38,928 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2024-11-12 16:18:38,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:18:38,929 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-12 16:18:38,931 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:38,932 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-12 16:18:38,958 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:18:38,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 216 flow [2024-11-12 16:18:38,978 INFO L124 PetriNetUnfolderBase]: 24/160 cut-off events. [2024-11-12 16:18:38,978 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:18:38,979 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. [2024-11-12 16:18:38,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 216 flow [2024-11-12 16:18:38,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 103 transitions, 216 flow [2024-11-12 16:18:38,983 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:38,984 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;@59449b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:38,984 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-12 16:18:38,985 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:38,986 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-12 16:18:38,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:38,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:38,986 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:38,986 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)] === [2024-11-12 16:18:38,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:38,987 INFO L85 PathProgramCache]: Analyzing trace with hash 429065, now seen corresponding path program 1 times [2024-11-12 16:18:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:39,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767728698] [2024-11-12 16:18:39,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:39,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:39,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:39,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767728698] [2024-11-12 16:18:39,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767728698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:39,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:39,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:39,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132137648] [2024-11-12 16:18:39,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:39,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:39,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:39,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 103 [2024-11-12 16:18:39,041 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) [2024-11-12 16:18:39,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:39,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 103 [2024-11-12 16:18:39,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:39,758 INFO L124 PetriNetUnfolderBase]: 3982/8767 cut-off events. [2024-11-12 16:18:39,758 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-12 16:18:39,769 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. [2024-11-12 16:18:39,802 INFO L140 encePairwiseOnDemand]: 83/103 looper letters, 51 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2024-11-12 16:18:39,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 316 flow [2024-11-12 16:18:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2024-11-12 16:18:39,805 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7055016181229773 [2024-11-12 16:18:39,805 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 216 flow. Second operand 3 states and 218 transitions. [2024-11-12 16:18:39,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 316 flow [2024-11-12 16:18:39,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 100 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:39,807 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 196 flow [2024-11-12 16:18:39,807 INFO L262 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} [2024-11-12 16:18:39,808 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2024-11-12 16:18:39,808 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 196 flow [2024-11-12 16:18:39,808 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) [2024-11-12 16:18:39,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:39,809 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:39,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:18:39,809 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)] === [2024-11-12 16:18:39,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:39,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1130047462, now seen corresponding path program 1 times [2024-11-12 16:18:39,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:39,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669574957] [2024-11-12 16:18:39,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:39,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:39,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669574957] [2024-11-12 16:18:39,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669574957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:39,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:39,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:18:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632547500] [2024-11-12 16:18:39,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:39,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:18:39,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:18:39,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:18:39,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 103 [2024-11-12 16:18:39,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:39,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:39,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 103 [2024-11-12 16:18:39,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:40,551 INFO L124 PetriNetUnfolderBase]: 3861/8574 cut-off events. [2024-11-12 16:18:40,551 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2024-11-12 16:18:40,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15147 conditions, 8574 events. 3861/8574 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 74191 event pairs, 1716 based on Foata normal form. 24/8074 useless extension candidates. Maximal degree in co-relation 1287. Up to 5713 conditions per place. [2024-11-12 16:18:40,589 INFO L140 encePairwiseOnDemand]: 99/103 looper letters, 74 selfloop transitions, 3 changer transitions 0/124 dead transitions. [2024-11-12 16:18:40,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 124 transitions, 424 flow [2024-11-12 16:18:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:18:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:18:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 267 transitions. [2024-11-12 16:18:40,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6480582524271845 [2024-11-12 16:18:40,590 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 196 flow. Second operand 4 states and 267 transitions. [2024-11-12 16:18:40,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 124 transitions, 424 flow [2024-11-12 16:18:40,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 124 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:18:40,593 INFO L231 Difference]: Finished difference. Result has 97 places, 87 transitions, 206 flow [2024-11-12 16:18:40,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=97, PETRI_TRANSITIONS=87} [2024-11-12 16:18:40,594 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2024-11-12 16:18:40,594 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 206 flow [2024-11-12 16:18:40,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:40,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:40,594 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-11-12 16:18:40,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:18:40,594 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:40,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1360331170, now seen corresponding path program 1 times [2024-11-12 16:18:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:40,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245983441] [2024-11-12 16:18:40,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:40,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:40,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:40,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245983441] [2024-11-12 16:18:40,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245983441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:40,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:40,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:40,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900909472] [2024-11-12 16:18:40,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:40,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:18:40,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:18:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:18:40,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 103 [2024-11-12 16:18:40,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 87 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:40,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:40,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 103 [2024-11-12 16:18:40,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:40,832 INFO L124 PetriNetUnfolderBase]: 957/1962 cut-off events. [2024-11-12 16:18:40,832 INFO L125 PetriNetUnfolderBase]: For 777/777 co-relation queries the response was YES. [2024-11-12 16:18:40,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4049 conditions, 1962 events. 957/1962 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12823 event pairs, 0 based on Foata normal form. 288/2146 useless extension candidates. Maximal degree in co-relation 313. Up to 1224 conditions per place. [2024-11-12 16:18:40,838 INFO L140 encePairwiseOnDemand]: 99/103 looper letters, 63 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2024-11-12 16:18:40,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 362 flow [2024-11-12 16:18:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:18:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:18:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 303 transitions. [2024-11-12 16:18:40,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5883495145631068 [2024-11-12 16:18:40,840 INFO L175 Difference]: Start difference. First operand has 97 places, 87 transitions, 206 flow. Second operand 5 states and 303 transitions. [2024-11-12 16:18:40,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 362 flow [2024-11-12 16:18:40,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 103 transitions, 352 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-12 16:18:40,844 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 152 flow [2024-11-12 16:18:40,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-12 16:18:40,845 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -16 predicate places. [2024-11-12 16:18:40,845 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 152 flow [2024-11-12 16:18:40,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:40,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:40,845 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:18:40,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:18:40,846 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:40,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash -466746453, now seen corresponding path program 1 times [2024-11-12 16:18:40,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:40,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335978477] [2024-11-12 16:18:40,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:40,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:40,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335978477] [2024-11-12 16:18:40,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335978477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:40,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:40,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:40,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231335011] [2024-11-12 16:18:40,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:40,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:40,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 103 [2024-11-12 16:18:40,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 152 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) [2024-11-12 16:18:40,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:40,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 103 [2024-11-12 16:18:40,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:41,081 INFO L124 PetriNetUnfolderBase]: 957/2130 cut-off events. [2024-11-12 16:18:41,081 INFO L125 PetriNetUnfolderBase]: For 502/502 co-relation queries the response was YES. [2024-11-12 16:18:41,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3927 conditions, 2130 events. 957/2130 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 13773 event pairs, 957 based on Foata normal form. 0/2083 useless extension candidates. Maximal degree in co-relation 2695. Up to 1584 conditions per place. [2024-11-12 16:18:41,088 INFO L140 encePairwiseOnDemand]: 94/103 looper letters, 28 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2024-11-12 16:18:41,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 194 flow [2024-11-12 16:18:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-12 16:18:41,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5048543689320388 [2024-11-12 16:18:41,090 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 152 flow. Second operand 3 states and 156 transitions. [2024-11-12 16:18:41,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 194 flow [2024-11-12 16:18:41,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 189 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:18:41,091 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 133 flow [2024-11-12 16:18:41,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-11-12 16:18:41,092 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -25 predicate places. [2024-11-12 16:18:41,093 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 133 flow [2024-11-12 16:18:41,093 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) [2024-11-12 16:18:41,093 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:41,093 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:18:41,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:18:41,093 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:41,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash -466746452, now seen corresponding path program 1 times [2024-11-12 16:18:41,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:41,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149437795] [2024-11-12 16:18:41,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:41,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:41,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:41,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149437795] [2024-11-12 16:18:41,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149437795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:41,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:41,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:41,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542856744] [2024-11-12 16:18:41,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:41,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:41,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:41,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:41,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 103 [2024-11-12 16:18:41,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 133 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) [2024-11-12 16:18:41,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:41,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 103 [2024-11-12 16:18:41,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:41,355 INFO L124 PetriNetUnfolderBase]: 957/2016 cut-off events. [2024-11-12 16:18:41,355 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-11-12 16:18:41,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3801 conditions, 2016 events. 957/2016 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 12336 event pairs, 957 based on Foata normal form. 0/1965 useless extension candidates. Maximal degree in co-relation 3792. Up to 1584 conditions per place. [2024-11-12 16:18:41,363 INFO L140 encePairwiseOnDemand]: 94/103 looper letters, 28 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2024-11-12 16:18:41,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 175 flow [2024-11-12 16:18:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-12 16:18:41,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5048543689320388 [2024-11-12 16:18:41,364 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 133 flow. Second operand 3 states and 156 transitions. [2024-11-12 16:18:41,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 175 flow [2024-11-12 16:18:41,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 50 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:18:41,365 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 118 flow [2024-11-12 16:18:41,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-11-12 16:18:41,366 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -32 predicate places. [2024-11-12 16:18:41,366 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 118 flow [2024-11-12 16:18:41,366 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) [2024-11-12 16:18:41,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:41,367 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-12 16:18:41,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:18:41,367 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:41,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash -779406151, now seen corresponding path program 1 times [2024-11-12 16:18:41,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:41,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685809679] [2024-11-12 16:18:41,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:41,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:41,378 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:41,387 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:41,387 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:41,388 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (29 of 30 remaining) [2024-11-12 16:18:41,388 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (28 of 30 remaining) [2024-11-12 16:18:41,388 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 30 remaining) [2024-11-12 16:18:41,388 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 30 remaining) [2024-11-12 16:18:41,388 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (25 of 30 remaining) [2024-11-12 16:18:41,388 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (24 of 30 remaining) [2024-11-12 16:18:41,388 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 30 remaining) [2024-11-12 16:18:41,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 30 remaining) [2024-11-12 16:18:41,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 30 remaining) [2024-11-12 16:18:41,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 30 remaining) [2024-11-12 16:18:41,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 30 remaining) [2024-11-12 16:18:41,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 30 remaining) [2024-11-12 16:18:41,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 30 remaining) [2024-11-12 16:18:41,390 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 30 remaining) [2024-11-12 16:18:41,390 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 30 remaining) [2024-11-12 16:18:41,390 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 30 remaining) [2024-11-12 16:18:41,390 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 30 remaining) [2024-11-12 16:18:41,390 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 30 remaining) [2024-11-12 16:18:41,390 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 30 remaining) [2024-11-12 16:18:41,390 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 30 remaining) [2024-11-12 16:18:41,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 30 remaining) [2024-11-12 16:18:41,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 30 remaining) [2024-11-12 16:18:41,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 30 remaining) [2024-11-12 16:18:41,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 30 remaining) [2024-11-12 16:18:41,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 30 remaining) [2024-11-12 16:18:41,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 30 remaining) [2024-11-12 16:18:41,391 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 30 remaining) [2024-11-12 16:18:41,392 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 30 remaining) [2024-11-12 16:18:41,392 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 30 remaining) [2024-11-12 16:18:41,392 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 30 remaining) [2024-11-12 16:18:41,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:18:41,392 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-12 16:18:41,393 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:41,393 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-12 16:18:41,415 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:18:41,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 139 transitions, 296 flow [2024-11-12 16:18:41,434 INFO L124 PetriNetUnfolderBase]: 34/225 cut-off events. [2024-11-12 16:18:41,434 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-12 16:18:41,435 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. [2024-11-12 16:18:41,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 139 transitions, 296 flow [2024-11-12 16:18:41,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 139 transitions, 296 flow [2024-11-12 16:18:41,438 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:41,438 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;@59449b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:41,438 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-12 16:18:41,439 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:41,439 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-12 16:18:41,440 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:41,440 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:41,440 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:41,440 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)] === [2024-11-12 16:18:41,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash 567092, now seen corresponding path program 1 times [2024-11-12 16:18:41,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:41,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675215048] [2024-11-12 16:18:41,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:41,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:41,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:41,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675215048] [2024-11-12 16:18:41,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675215048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:41,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:41,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:41,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36606516] [2024-11-12 16:18:41,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:41,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:41,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:41,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 139 [2024-11-12 16:18:41,462 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) [2024-11-12 16:18:41,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:41,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 139 [2024-11-12 16:18:41,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:50,430 INFO L124 PetriNetUnfolderBase]: 73678/131731 cut-off events. [2024-11-12 16:18:50,431 INFO L125 PetriNetUnfolderBase]: For 1308/1308 co-relation queries the response was YES. [2024-11-12 16:18:50,657 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. [2024-11-12 16:18:51,163 INFO L140 encePairwiseOnDemand]: 113/139 looper letters, 63 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2024-11-12 16:18:51,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 130 transitions, 408 flow [2024-11-12 16:18:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2024-11-12 16:18:51,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6954436450839329 [2024-11-12 16:18:51,165 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 296 flow. Second operand 3 states and 290 transitions. [2024-11-12 16:18:51,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 130 transitions, 408 flow [2024-11-12 16:18:51,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 130 transitions, 406 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:51,168 INFO L231 Difference]: Finished difference. Result has 126 places, 117 transitions, 262 flow [2024-11-12 16:18:51,168 INFO L262 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} [2024-11-12 16:18:51,169 INFO L279 CegarLoopForPetriNet]: 124 programPoint places, 2 predicate places. [2024-11-12 16:18:51,169 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 117 transitions, 262 flow [2024-11-12 16:18:51,169 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) [2024-11-12 16:18:51,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:51,169 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:51,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:18:51,169 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)] === [2024-11-12 16:18:51,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash -242816690, now seen corresponding path program 1 times [2024-11-12 16:18:51,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:51,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401344155] [2024-11-12 16:18:51,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:51,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:18:51,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:51,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401344155] [2024-11-12 16:18:51,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401344155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:51,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:51,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:18:51,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894012345] [2024-11-12 16:18:51,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:51,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:18:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:51,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:18:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:18:51,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 139 [2024-11-12 16:18:51,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 117 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:51,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:51,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 139 [2024-11-12 16:18:51,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:59,909 INFO L124 PetriNetUnfolderBase]: 73557/130282 cut-off events. [2024-11-12 16:18:59,909 INFO L125 PetriNetUnfolderBase]: For 6125/6125 co-relation queries the response was YES. [2024-11-12 16:19:00,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238088 conditions, 130282 events. 73557/130282 cut-off events. For 6125/6125 co-relation queries the response was YES. Maximal size of possible extension queue 3111. Compared 1341868 event pairs, 47792 based on Foata normal form. 24/123979 useless extension candidates. Maximal degree in co-relation 217761. Up to 101329 conditions per place. [2024-11-12 16:19:00,798 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 87 selfloop transitions, 3 changer transitions 0/155 dead transitions. [2024-11-12 16:19:00,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 155 transitions, 520 flow [2024-11-12 16:19:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:19:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:19:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2024-11-12 16:19:00,799 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6330935251798561 [2024-11-12 16:19:00,800 INFO L175 Difference]: Start difference. First operand has 126 places, 117 transitions, 262 flow. Second operand 4 states and 352 transitions. [2024-11-12 16:19:00,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 155 transitions, 520 flow [2024-11-12 16:19:00,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 155 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:19:00,804 INFO L231 Difference]: Finished difference. Result has 129 places, 118 transitions, 278 flow [2024-11-12 16:19:00,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=129, PETRI_TRANSITIONS=118} [2024-11-12 16:19:00,805 INFO L279 CegarLoopForPetriNet]: 124 programPoint places, 5 predicate places. [2024-11-12 16:19:00,805 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 118 transitions, 278 flow [2024-11-12 16:19:00,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:19:00,806 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:00,806 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:19:00,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:19:00,806 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)] === [2024-11-12 16:19:00,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash 485415385, now seen corresponding path program 1 times [2024-11-12 16:19:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298313609] [2024-11-12 16:19:00,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:00,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:00,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298313609] [2024-11-12 16:19:00,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298313609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:00,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:00,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:19:00,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105121724] [2024-11-12 16:19:00,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:00,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:19:00,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:00,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:19:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:19:00,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 139 [2024-11-12 16:19:00,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 118 transitions, 278 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) [2024-11-12 16:19:00,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:00,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 139 [2024-11-12 16:19:00,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:08,893 INFO L124 PetriNetUnfolderBase]: 68541/116976 cut-off events. [2024-11-12 16:19:08,893 INFO L125 PetriNetUnfolderBase]: For 11737/11737 co-relation queries the response was YES. [2024-11-12 16:19:09,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220104 conditions, 116976 events. 68541/116976 cut-off events. For 11737/11737 co-relation queries the response was YES. Maximal size of possible extension queue 2647. Compared 1131562 event pairs, 68541 based on Foata normal form. 0/114499 useless extension candidates. Maximal degree in co-relation 163407. Up to 94800 conditions per place. [2024-11-12 16:19:09,531 INFO L140 encePairwiseOnDemand]: 126/139 looper letters, 51 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2024-11-12 16:19:09,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 106 transitions, 358 flow [2024-11-12 16:19:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:19:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:19:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-11-12 16:19:09,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5371702637889688 [2024-11-12 16:19:09,532 INFO L175 Difference]: Start difference. First operand has 129 places, 118 transitions, 278 flow. Second operand 3 states and 224 transitions. [2024-11-12 16:19:09,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 106 transitions, 358 flow [2024-11-12 16:19:09,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 106 transitions, 352 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-12 16:19:09,534 INFO L231 Difference]: Finished difference. Result has 117 places, 106 transitions, 250 flow [2024-11-12 16:19:09,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=115, 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=250, PETRI_PLACES=117, PETRI_TRANSITIONS=106} [2024-11-12 16:19:09,535 INFO L279 CegarLoopForPetriNet]: 124 programPoint places, -7 predicate places. [2024-11-12 16:19:09,535 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 106 transitions, 250 flow [2024-11-12 16:19:09,535 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) [2024-11-12 16:19:09,535 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:09,535 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-11-12 16:19:09,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:19:09,535 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:19:09,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1753021753, now seen corresponding path program 1 times [2024-11-12 16:19:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:09,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088817022] [2024-11-12 16:19:09,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:09,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:09,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088817022] [2024-11-12 16:19:09,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088817022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:09,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:09,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:19:09,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706816975] [2024-11-12 16:19:09,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:09,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:19:09,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:09,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:19:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:19:09,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 139 [2024-11-12 16:19:09,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 106 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:19:09,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:09,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 139 [2024-11-12 16:19:09,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand