./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:11:37,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:11:37,506 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:11:37,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:11:37,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:11:37,534 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:11:37,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:11:37,536 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:11:37,537 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:11:37,537 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:11:37,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:11:37,538 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:11:37,538 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:11:37,540 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:11:37,540 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:11:37,540 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:11:37,540 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:11:37,541 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:11:37,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:11:37,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:11:37,541 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:11:37,542 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:11:37,544 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:11:37,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:11:37,544 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:11:37,544 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:11:37,545 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:11:37,545 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:11:37,545 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:11:37,545 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:11:37,545 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:11:37,545 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:11:37,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:11:37,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:11:37,546 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:11:37,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:11:37,546 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:11:37,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:11:37,546 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:11:37,547 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:11:37,547 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:11:37,548 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:11:37,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2024-10-24 19:11:37,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:11:37,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:11:37,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:11:37,753 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:11:37,753 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:11:37,754 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-10-24 19:11:38,902 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:11:39,147 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:11:39,147 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-10-24 19:11:39,165 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05807a2bf/03352e9300b44f15bc6f52cc98ef0a60/FLAGa2a28c965 [2024-10-24 19:11:39,179 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05807a2bf/03352e9300b44f15bc6f52cc98ef0a60 [2024-10-24 19:11:39,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:11:39,183 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:11:39,186 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:11:39,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:11:39,190 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:11:39,191 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,191 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f704f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39, skipping insertion in model container [2024-10-24 19:11:39,191 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,245 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:11:39,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:11:39,576 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:11:39,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:11:39,660 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:11:39,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39 WrapperNode [2024-10-24 19:11:39,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:11:39,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:11:39,662 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:11:39,662 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:11:39,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,698 INFO L138 Inliner]: procedures = 272, calls = 36, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 222 [2024-10-24 19:11:39,698 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:11:39,699 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:11:39,700 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:11:39,700 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:11:39,708 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,710 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,721 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 2, 5, 11]. 55 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0]. The 6 writes are split as follows [0, 1, 0, 5]. [2024-10-24 19:11:39,721 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,721 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,728 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,732 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,734 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,735 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,737 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:11:39,738 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:11:39,738 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:11:39,739 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:11:39,739 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (1/1) ... [2024-10-24 19:11:39,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:11:39,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:39,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:11:39,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:11:39,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 19:11:39,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 19:11:39,793 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 19:11:39,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:11:39,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 19:11:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 19:11:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:11:39,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:11:39,799 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:11:39,916 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:11:39,917 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:11:40,153 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:11:40,153 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:11:40,286 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:11:40,286 INFO L314 CfgBuilder]: Removed 25 assume(true) statements. [2024-10-24 19:11:40,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:11:40 BoogieIcfgContainer [2024-10-24 19:11:40,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:11:40,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:11:40,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:11:40,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:11:40,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:11:39" (1/3) ... [2024-10-24 19:11:40,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697dd09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:11:40, skipping insertion in model container [2024-10-24 19:11:40,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:11:39" (2/3) ... [2024-10-24 19:11:40,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697dd09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:11:40, skipping insertion in model container [2024-10-24 19:11:40,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:11:40" (3/3) ... [2024-10-24 19:11:40,301 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2024-10-24 19:11:40,326 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:11:40,326 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-10-24 19:11:40,326 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:11:40,392 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-24 19:11:40,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 141 transitions, 289 flow [2024-10-24 19:11:40,471 INFO L124 PetriNetUnfolderBase]: 44/213 cut-off events. [2024-10-24 19:11:40,471 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 19:11:40,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 213 events. 44/213 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1021 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2024-10-24 19:11:40,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 141 transitions, 289 flow [2024-10-24 19:11:40,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 141 transitions, 289 flow [2024-10-24 19:11:40,490 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:11:40,496 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;@40901cfc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:11:40,496 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-10-24 19:11:40,499 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:11:40,499 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-24 19:11:40,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:11:40,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:40,500 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-24 19:11:40,500 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:11:40,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash 18726794, now seen corresponding path program 1 times [2024-10-24 19:11:40,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:40,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851488494] [2024-10-24 19:11:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:40,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:40,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:40,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851488494] [2024-10-24 19:11:40,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851488494] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:40,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:40,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:11:40,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199942096] [2024-10-24 19:11:40,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:40,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:40,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:40,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:40,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-10-24 19:11:40,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:40,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:40,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-10-24 19:11:40,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:41,023 INFO L124 PetriNetUnfolderBase]: 625/2072 cut-off events. [2024-10-24 19:11:41,023 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2024-10-24 19:11:41,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3265 conditions, 2072 events. 625/2072 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15912 event pairs, 525 based on Foata normal form. 394/2156 useless extension candidates. Maximal degree in co-relation 3159. Up to 1187 conditions per place. [2024-10-24 19:11:41,039 INFO L140 encePairwiseOnDemand]: 114/141 looper letters, 53 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-10-24 19:11:41,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 116 transitions, 349 flow [2024-10-24 19:11:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-10-24 19:11:41,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-10-24 19:11:41,052 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 289 flow. Second operand 3 states and 263 transitions. [2024-10-24 19:11:41,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 116 transitions, 349 flow [2024-10-24 19:11:41,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:11:41,058 INFO L231 Difference]: Finished difference. Result has 115 places, 116 transitions, 249 flow [2024-10-24 19:11:41,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=115, PETRI_TRANSITIONS=116} [2024-10-24 19:11:41,062 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-10-24 19:11:41,062 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 116 transitions, 249 flow [2024-10-24 19:11:41,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:41,062 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:41,063 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:11:41,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:11:41,063 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:11:41,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash 580525473, now seen corresponding path program 1 times [2024-10-24 19:11:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:41,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028490445] [2024-10-24 19:11:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:41,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:41,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:41,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028490445] [2024-10-24 19:11:41,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028490445] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:41,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467957108] [2024-10-24 19:11:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:41,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:41,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:41,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:11:41,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 19:11:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:41,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:11:41,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:41,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:11:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:41,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467957108] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:11:41,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:11:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 19:11:41,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260394098] [2024-10-24 19:11:41,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:11:41,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:11:41,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:11:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:11:41,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-10-24 19:11:41,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 116 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:41,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:41,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-10-24 19:11:41,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:41,539 INFO L124 PetriNetUnfolderBase]: 625/2075 cut-off events. [2024-10-24 19:11:41,540 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2024-10-24 19:11:41,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 2075 events. 625/2075 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15930 event pairs, 525 based on Foata normal form. 0/1765 useless extension candidates. Maximal degree in co-relation 3269. Up to 1187 conditions per place. [2024-10-24 19:11:41,550 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-10-24 19:11:41,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 377 flow [2024-10-24 19:11:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:11:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:11:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2024-10-24 19:11:41,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5047281323877069 [2024-10-24 19:11:41,556 INFO L175 Difference]: Start difference. First operand has 115 places, 116 transitions, 249 flow. Second operand 6 states and 427 transitions. [2024-10-24 19:11:41,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 377 flow [2024-10-24 19:11:41,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 373 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:11:41,581 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 281 flow [2024-10-24 19:11:41,582 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2024-10-24 19:11:41,582 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2024-10-24 19:11:41,582 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 281 flow [2024-10-24 19:11:41,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:41,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:41,583 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:11:41,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 19:11:41,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:41,786 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:11:41,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:41,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1404070645, now seen corresponding path program 2 times [2024-10-24 19:11:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:41,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846592206] [2024-10-24 19:11:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:41,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846592206] [2024-10-24 19:11:41,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846592206] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:41,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474412090] [2024-10-24 19:11:41,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:11:41,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:41,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:41,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:11:41,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 19:11:41,965 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:11:41,965 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:11:41,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:11:41,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:42,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 19:11:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 19:11:42,027 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:11:42,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474412090] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:42,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 19:11:42,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2024-10-24 19:11:42,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724239568] [2024-10-24 19:11:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:42,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:42,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:42,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-24 19:11:42,053 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2024-10-24 19:11:42,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:42,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:42,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2024-10-24 19:11:42,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:42,240 INFO L124 PetriNetUnfolderBase]: 619/1982 cut-off events. [2024-10-24 19:11:42,241 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-24 19:11:42,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3212 conditions, 1982 events. 619/1982 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 15582 event pairs, 0 based on Foata normal form. 1/1672 useless extension candidates. Maximal degree in co-relation 3178. Up to 1177 conditions per place. [2024-10-24 19:11:42,248 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2024-10-24 19:11:42,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 142 transitions, 491 flow [2024-10-24 19:11:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2024-10-24 19:11:42,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6146572104018913 [2024-10-24 19:11:42,250 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 281 flow. Second operand 3 states and 260 transitions. [2024-10-24 19:11:42,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 142 transitions, 491 flow [2024-10-24 19:11:42,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 142 transitions, 477 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 19:11:42,255 INFO L231 Difference]: Finished difference. Result has 124 places, 119 transitions, 277 flow [2024-10-24 19:11:42,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=124, PETRI_TRANSITIONS=119} [2024-10-24 19:11:42,256 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 10 predicate places. [2024-10-24 19:11:42,256 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 119 transitions, 277 flow [2024-10-24 19:11:42,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:42,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:42,256 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:11:42,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 19:11:42,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-24 19:11:42,457 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:11:42,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1404070646, now seen corresponding path program 1 times [2024-10-24 19:11:42,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:42,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001091769] [2024-10-24 19:11:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 19:11:42,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:42,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001091769] [2024-10-24 19:11:42,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001091769] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:42,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:42,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:11:42,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236226686] [2024-10-24 19:11:42,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:42,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:42,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:42,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:42,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:42,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 141 [2024-10-24 19:11:42,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 119 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:42,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:42,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 141 [2024-10-24 19:11:42,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:42,750 INFO L124 PetriNetUnfolderBase]: 666/2129 cut-off events. [2024-10-24 19:11:42,751 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-10-24 19:11:42,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3479 conditions, 2129 events. 666/2129 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 16498 event pairs, 525 based on Foata normal form. 0/1858 useless extension candidates. Maximal degree in co-relation 3450. Up to 1161 conditions per place. [2024-10-24 19:11:42,758 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2024-10-24 19:11:42,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 139 transitions, 481 flow [2024-10-24 19:11:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2024-10-24 19:11:42,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933806146572104 [2024-10-24 19:11:42,760 INFO L175 Difference]: Start difference. First operand has 124 places, 119 transitions, 277 flow. Second operand 3 states and 251 transitions. [2024-10-24 19:11:42,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 139 transitions, 481 flow [2024-10-24 19:11:42,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 139 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:11:42,762 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 273 flow [2024-10-24 19:11:42,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2024-10-24 19:11:42,763 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2024-10-24 19:11:42,763 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 273 flow [2024-10-24 19:11:42,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:42,763 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:42,763 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 19:11:42,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 19:11:42,763 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:11:42,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 576466829, now seen corresponding path program 1 times [2024-10-24 19:11:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435433974] [2024-10-24 19:11:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:42,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:11:42,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:42,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435433974] [2024-10-24 19:11:42,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435433974] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:42,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373145231] [2024-10-24 19:11:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:42,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:42,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:42,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:11:42,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 19:11:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:42,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:11:42,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:11:42,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:11:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:11:42,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373145231] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:11:42,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:11:42,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 19:11:42,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968034303] [2024-10-24 19:11:42,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:11:42,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 19:11:42,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 19:11:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-24 19:11:42,969 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-10-24 19:11:42,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 273 flow. Second operand has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:42,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:42,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-10-24 19:11:42,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:43,218 INFO L124 PetriNetUnfolderBase]: 622/2038 cut-off events. [2024-10-24 19:11:43,218 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-10-24 19:11:43,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3317 conditions, 2038 events. 622/2038 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 15532 event pairs, 525 based on Foata normal form. 6/1772 useless extension candidates. Maximal degree in co-relation 3264. Up to 1164 conditions per place. [2024-10-24 19:11:43,226 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-10-24 19:11:43,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 123 transitions, 437 flow [2024-10-24 19:11:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:11:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:11:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 802 transitions. [2024-10-24 19:11:43,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4739952718676123 [2024-10-24 19:11:43,229 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 273 flow. Second operand 12 states and 802 transitions. [2024-10-24 19:11:43,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 123 transitions, 437 flow [2024-10-24 19:11:43,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 123 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:11:43,232 INFO L231 Difference]: Finished difference. Result has 137 places, 123 transitions, 353 flow [2024-10-24 19:11:43,232 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=353, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2024-10-24 19:11:43,233 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 23 predicate places. [2024-10-24 19:11:43,233 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 353 flow [2024-10-24 19:11:43,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:43,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:43,234 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 19:11:43,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 19:11:43,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:43,438 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:11:43,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2090981427, now seen corresponding path program 2 times [2024-10-24 19:11:43,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:43,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928112569] [2024-10-24 19:11:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:43,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:11:43,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:43,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928112569] [2024-10-24 19:11:43,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928112569] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:43,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838882454] [2024-10-24 19:11:43,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:11:43,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:43,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:43,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:11:43,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 19:11:43,621 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:11:43,622 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:11:43,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:11:43,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:43,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 19:11:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:11:43,713 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:11:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838882454] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:43,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 19:11:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2024-10-24 19:11:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906689968] [2024-10-24 19:11:43,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:43,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:11:43,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:11:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:11:43,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2024-10-24 19:11:43,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:43,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:43,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2024-10-24 19:11:43,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:44,053 INFO L124 PetriNetUnfolderBase]: 598/1923 cut-off events. [2024-10-24 19:11:44,053 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-24 19:11:44,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3196 conditions, 1923 events. 598/1923 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14970 event pairs, 0 based on Foata normal form. 22/1700 useless extension candidates. Maximal degree in co-relation 3119. Up to 1051 conditions per place. [2024-10-24 19:11:44,061 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 127 selfloop transitions, 4 changer transitions 0/189 dead transitions. [2024-10-24 19:11:44,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 745 flow [2024-10-24 19:11:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:11:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:11:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 422 transitions. [2024-10-24 19:11:44,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5985815602836879 [2024-10-24 19:11:44,064 INFO L175 Difference]: Start difference. First operand has 137 places, 123 transitions, 353 flow. Second operand 5 states and 422 transitions. [2024-10-24 19:11:44,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 745 flow [2024-10-24 19:11:44,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 189 transitions, 697 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-24 19:11:44,070 INFO L231 Difference]: Finished difference. Result has 136 places, 123 transitions, 316 flow [2024-10-24 19:11:44,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=136, PETRI_TRANSITIONS=123} [2024-10-24 19:11:44,070 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 22 predicate places. [2024-10-24 19:11:44,071 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 123 transitions, 316 flow [2024-10-24 19:11:44,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:44,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:44,072 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 19:11:44,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 19:11:44,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:44,273 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:11:44,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:44,273 INFO L85 PathProgramCache]: Analyzing trace with hash -395914107, now seen corresponding path program 1 times [2024-10-24 19:11:44,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:44,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201178509] [2024-10-24 19:11:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:44,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:11:44,294 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 19:11:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:11:44,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 19:11:44,324 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 19:11:44,325 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-10-24 19:11:44,326 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-10-24 19:11:44,326 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-10-24 19:11:44,326 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-10-24 19:11:44,327 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-10-24 19:11:44,327 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-10-24 19:11:44,327 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-10-24 19:11:44,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-10-24 19:11:44,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-10-24 19:11:44,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-10-24 19:11:44,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-10-24 19:11:44,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-10-24 19:11:44,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-10-24 19:11:44,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-10-24 19:11:44,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 19:11:44,332 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-24 19:11:44,336 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 19:11:44,336 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 19:11:44,372 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 19:11:44,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 204 transitions, 424 flow [2024-10-24 19:11:44,407 INFO L124 PetriNetUnfolderBase]: 74/360 cut-off events. [2024-10-24 19:11:44,408 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-24 19:11:44,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 360 events. 74/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2070 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 215. Up to 12 conditions per place. [2024-10-24 19:11:44,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 204 transitions, 424 flow [2024-10-24 19:11:44,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 204 transitions, 424 flow [2024-10-24 19:11:44,414 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:11:44,414 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;@40901cfc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:11:44,415 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-24 19:11:44,416 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:11:44,416 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-24 19:11:44,416 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:11:44,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:44,416 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-24 19:11:44,417 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-24 19:11:44,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash 25006730, now seen corresponding path program 1 times [2024-10-24 19:11:44,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:44,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241542653] [2024-10-24 19:11:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:44,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:44,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:44,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241542653] [2024-10-24 19:11:44,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241542653] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:44,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:44,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:11:44,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085545363] [2024-10-24 19:11:44,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:44,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:44,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:44,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-10-24 19:11:44,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 204 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:44,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:44,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-10-24 19:11:44,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:48,399 INFO L124 PetriNetUnfolderBase]: 27581/60837 cut-off events. [2024-10-24 19:11:48,399 INFO L125 PetriNetUnfolderBase]: For 195/200 co-relation queries the response was YES. [2024-10-24 19:11:48,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100897 conditions, 60837 events. 27581/60837 cut-off events. For 195/200 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679650 event pairs, 24192 based on Foata normal form. 13675/66308 useless extension candidates. Maximal degree in co-relation 93084. Up to 39942 conditions per place. [2024-10-24 19:11:48,728 INFO L140 encePairwiseOnDemand]: 165/204 looper letters, 77 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2024-10-24 19:11:48,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 166 transitions, 506 flow [2024-10-24 19:11:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-10-24 19:11:48,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6160130718954249 [2024-10-24 19:11:48,730 INFO L175 Difference]: Start difference. First operand has 164 places, 204 transitions, 424 flow. Second operand 3 states and 377 transitions. [2024-10-24 19:11:48,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 166 transitions, 506 flow [2024-10-24 19:11:48,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:11:48,732 INFO L231 Difference]: Finished difference. Result has 164 places, 166 transitions, 358 flow [2024-10-24 19:11:48,733 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=164, PETRI_TRANSITIONS=166} [2024-10-24 19:11:48,733 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 0 predicate places. [2024-10-24 19:11:48,733 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 166 transitions, 358 flow [2024-10-24 19:11:48,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:48,734 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:48,734 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:11:48,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 19:11:48,734 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-24 19:11:48,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:48,735 INFO L85 PathProgramCache]: Analyzing trace with hash 775203692, now seen corresponding path program 1 times [2024-10-24 19:11:48,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:48,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791401782] [2024-10-24 19:11:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:48,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:48,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791401782] [2024-10-24 19:11:48,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791401782] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035329071] [2024-10-24 19:11:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:48,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:48,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:48,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:11:48,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 19:11:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:48,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:11:48,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:48,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:11:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:48,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035329071] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:11:48,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:11:48,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 19:11:48,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930470219] [2024-10-24 19:11:48,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:11:48,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:11:48,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:48,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:11:48,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:11:48,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-10-24 19:11:48,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 166 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:48,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:48,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-10-24 19:11:48,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:53,226 INFO L124 PetriNetUnfolderBase]: 27581/60840 cut-off events. [2024-10-24 19:11:53,227 INFO L125 PetriNetUnfolderBase]: For 200/205 co-relation queries the response was YES. [2024-10-24 19:11:53,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100913 conditions, 60840 events. 27581/60840 cut-off events. For 200/205 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679806 event pairs, 24192 based on Foata normal form. 0/52636 useless extension candidates. Maximal degree in co-relation 100900. Up to 39942 conditions per place. [2024-10-24 19:11:53,588 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 77 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2024-10-24 19:11:53,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 169 transitions, 534 flow [2024-10-24 19:11:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:11:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:11:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 607 transitions. [2024-10-24 19:11:53,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4959150326797386 [2024-10-24 19:11:53,592 INFO L175 Difference]: Start difference. First operand has 164 places, 166 transitions, 358 flow. Second operand 6 states and 607 transitions. [2024-10-24 19:11:53,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 169 transitions, 534 flow [2024-10-24 19:11:53,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 169 transitions, 530 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:11:53,596 INFO L231 Difference]: Finished difference. Result has 171 places, 169 transitions, 390 flow [2024-10-24 19:11:53,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=171, PETRI_TRANSITIONS=169} [2024-10-24 19:11:53,598 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 7 predicate places. [2024-10-24 19:11:53,599 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 169 transitions, 390 flow [2024-10-24 19:11:53,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:53,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:53,599 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:11:53,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 19:11:53,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:53,800 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-24 19:11:53,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash 49134346, now seen corresponding path program 2 times [2024-10-24 19:11:53,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:53,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158408258] [2024-10-24 19:11:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 19:11:53,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:53,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158408258] [2024-10-24 19:11:53,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158408258] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:53,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:53,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:11:53,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834543593] [2024-10-24 19:11:53,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:53,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:53,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:53,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:53,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 204 [2024-10-24 19:11:53,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 169 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:53,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:53,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 204 [2024-10-24 19:11:53,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:57,666 INFO L124 PetriNetUnfolderBase]: 29604/64368 cut-off events. [2024-10-24 19:11:57,667 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2024-10-24 19:11:57,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107514 conditions, 64368 events. 29604/64368 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 1770. Compared 719455 event pairs, 24171 based on Foata normal form. 0/55924 useless extension candidates. Maximal degree in co-relation 107479. Up to 39895 conditions per place. [2024-10-24 19:11:57,999 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 126 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2024-10-24 19:11:57,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 730 flow [2024-10-24 19:11:58,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2024-10-24 19:11:58,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-10-24 19:11:58,000 INFO L175 Difference]: Start difference. First operand has 171 places, 169 transitions, 390 flow. Second operand 3 states and 375 transitions. [2024-10-24 19:11:58,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 730 flow [2024-10-24 19:11:58,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 211 transitions, 716 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 19:11:58,003 INFO L231 Difference]: Finished difference. Result has 170 places, 167 transitions, 376 flow [2024-10-24 19:11:58,003 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=170, PETRI_TRANSITIONS=167} [2024-10-24 19:11:58,004 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 6 predicate places. [2024-10-24 19:11:58,004 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 167 transitions, 376 flow [2024-10-24 19:11:58,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:58,004 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:58,004 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:11:58,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 19:11:58,004 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-24 19:11:58,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:58,005 INFO L85 PathProgramCache]: Analyzing trace with hash 49134347, now seen corresponding path program 1 times [2024-10-24 19:11:58,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:58,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954890148] [2024-10-24 19:11:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:58,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:58,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:58,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954890148] [2024-10-24 19:11:58,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954890148] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:58,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754321219] [2024-10-24 19:11:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:58,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:58,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:58,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:11:58,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 19:11:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:58,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:11:58,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:58,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:11:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:58,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754321219] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:11:58,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:11:58,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 19:11:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631179291] [2024-10-24 19:11:58,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:11:58,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 19:11:58,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 19:11:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-24 19:11:58,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-10-24 19:11:58,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 167 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:58,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:58,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-10-24 19:11:58,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:02,516 INFO L124 PetriNetUnfolderBase]: 27581/60830 cut-off events. [2024-10-24 19:12:02,516 INFO L125 PetriNetUnfolderBase]: For 765/770 co-relation queries the response was YES. [2024-10-24 19:12:02,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101458 conditions, 60830 events. 27581/60830 cut-off events. For 765/770 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679501 event pairs, 24192 based on Foata normal form. 6/52649 useless extension candidates. Maximal degree in co-relation 101405. Up to 39942 conditions per place. [2024-10-24 19:12:02,809 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 77 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2024-10-24 19:12:02,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 173 transitions, 588 flow [2024-10-24 19:12:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:12:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:12:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1138 transitions. [2024-10-24 19:12:02,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46486928104575165 [2024-10-24 19:12:02,812 INFO L175 Difference]: Start difference. First operand has 170 places, 167 transitions, 376 flow. Second operand 12 states and 1138 transitions. [2024-10-24 19:12:02,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 173 transitions, 588 flow [2024-10-24 19:12:02,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 173 transitions, 584 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:12:02,820 INFO L231 Difference]: Finished difference. Result has 185 places, 173 transitions, 456 flow [2024-10-24 19:12:02,821 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=456, PETRI_PLACES=185, PETRI_TRANSITIONS=173} [2024-10-24 19:12:02,821 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 21 predicate places. [2024-10-24 19:12:02,821 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 173 transitions, 456 flow [2024-10-24 19:12:02,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:12:02,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:02,822 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-24 19:12:02,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 19:12:03,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:12:03,023 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-24 19:12:03,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:03,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1741127733, now seen corresponding path program 2 times [2024-10-24 19:12:03,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:03,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720155855] [2024-10-24 19:12:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:03,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:03,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:03,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720155855] [2024-10-24 19:12:03,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720155855] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:03,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:03,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:12:03,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966317632] [2024-10-24 19:12:03,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:03,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:12:03,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:12:03,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:12:03,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 204 [2024-10-24 19:12:03,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 173 transitions, 456 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:12:03,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:03,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 204 [2024-10-24 19:12:03,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:07,270 INFO L124 PetriNetUnfolderBase]: 27992/60918 cut-off events. [2024-10-24 19:12:07,271 INFO L125 PetriNetUnfolderBase]: For 280/324 co-relation queries the response was YES. [2024-10-24 19:12:07,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102013 conditions, 60918 events. 27992/60918 cut-off events. For 280/324 co-relation queries the response was YES. Maximal size of possible extension queue 1737. Compared 681222 event pairs, 12096 based on Foata normal form. 1/52872 useless extension candidates. Maximal degree in co-relation 101936. Up to 40894 conditions per place. [2024-10-24 19:12:07,645 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 111 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2024-10-24 19:12:07,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 197 transitions, 730 flow [2024-10-24 19:12:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:12:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:12:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2024-10-24 19:12:07,646 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5931372549019608 [2024-10-24 19:12:07,646 INFO L175 Difference]: Start difference. First operand has 185 places, 173 transitions, 456 flow. Second operand 3 states and 363 transitions. [2024-10-24 19:12:07,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 197 transitions, 730 flow [2024-10-24 19:12:07,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 197 transitions, 682 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-24 19:12:07,650 INFO L231 Difference]: Finished difference. Result has 183 places, 174 transitions, 422 flow [2024-10-24 19:12:07,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=183, PETRI_TRANSITIONS=174} [2024-10-24 19:12:07,650 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 19 predicate places. [2024-10-24 19:12:07,651 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 174 transitions, 422 flow [2024-10-24 19:12:07,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:12:07,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:07,651 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 19:12:07,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-24 19:12:07,651 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-24 19:12:07,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:07,651 INFO L85 PathProgramCache]: Analyzing trace with hash -959625232, now seen corresponding path program 1 times [2024-10-24 19:12:07,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:07,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408720392] [2024-10-24 19:12:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:07,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:07,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:07,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408720392] [2024-10-24 19:12:07,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408720392] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:12:07,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271357774] [2024-10-24 19:12:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:07,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:12:07,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:12:07,753 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:12:07,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 19:12:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:07,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:12:07,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:12:07,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 19:12:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:07,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:12:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:07,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271357774] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:12:07,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:12:07,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 19:12:07,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635837845] [2024-10-24 19:12:07,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:12:07,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:12:07,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:12:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:12:08,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 204 [2024-10-24 19:12:08,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 174 transitions, 422 flow. Second operand has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:12:08,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:08,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 204 [2024-10-24 19:12:08,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:12,121 INFO L124 PetriNetUnfolderBase]: 27001/56866 cut-off events. [2024-10-24 19:12:12,122 INFO L125 PetriNetUnfolderBase]: For 1565/1565 co-relation queries the response was YES. [2024-10-24 19:12:12,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97797 conditions, 56866 events. 27001/56866 cut-off events. For 1565/1565 co-relation queries the response was YES. Maximal size of possible extension queue 1679. Compared 622244 event pairs, 981 based on Foata normal form. 528/50470 useless extension candidates. Maximal degree in co-relation 97743. Up to 34250 conditions per place. [2024-10-24 19:12:12,467 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 200 selfloop transitions, 4 changer transitions 0/287 dead transitions. [2024-10-24 19:12:12,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 287 transitions, 1054 flow [2024-10-24 19:12:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:12:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:12:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 622 transitions. [2024-10-24 19:12:12,469 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6098039215686275 [2024-10-24 19:12:12,469 INFO L175 Difference]: Start difference. First operand has 183 places, 174 transitions, 422 flow. Second operand 5 states and 622 transitions. [2024-10-24 19:12:12,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 287 transitions, 1054 flow [2024-10-24 19:12:12,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 287 transitions, 1052 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:12:12,476 INFO L231 Difference]: Finished difference. Result has 185 places, 173 transitions, 424 flow [2024-10-24 19:12:12,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=185, PETRI_TRANSITIONS=173} [2024-10-24 19:12:12,477 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 21 predicate places. [2024-10-24 19:12:12,477 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 173 transitions, 424 flow [2024-10-24 19:12:12,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:12:12,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:12,477 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-24 19:12:12,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 19:12:12,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:12:12,682 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-24 19:12:12,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:12,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1765103687, now seen corresponding path program 1 times [2024-10-24 19:12:12,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:12,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411399116] [2024-10-24 19:12:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:12,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:12:12,702 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 19:12:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:12:12,726 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 19:12:12,727 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 19:12:12,727 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-10-24 19:12:12,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-10-24 19:12:12,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-10-24 19:12:12,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-10-24 19:12:12,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-10-24 19:12:12,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-10-24 19:12:12,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-10-24 19:12:12,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-10-24 19:12:12,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-10-24 19:12:12,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-10-24 19:12:12,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-10-24 19:12:12,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-10-24 19:12:12,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-10-24 19:12:12,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-10-24 19:12:12,729 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-10-24 19:12:12,730 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-10-24 19:12:12,731 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-10-24 19:12:12,732 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-10-24 19:12:12,732 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-10-24 19:12:12,732 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-10-24 19:12:12,732 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-10-24 19:12:12,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-24 19:12:12,732 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-24 19:12:12,733 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 19:12:12,733 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 19:12:12,767 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 19:12:12,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 267 transitions, 561 flow [2024-10-24 19:12:12,802 INFO L124 PetriNetUnfolderBase]: 107/528 cut-off events. [2024-10-24 19:12:12,802 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-24 19:12:12,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 528 events. 107/528 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3258 event pairs, 1 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 369. Up to 16 conditions per place. [2024-10-24 19:12:12,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 267 transitions, 561 flow [2024-10-24 19:12:12,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 267 transitions, 561 flow [2024-10-24 19:12:12,814 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:12:12,815 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;@40901cfc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:12:12,815 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-10-24 19:12:12,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:12:12,816 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-24 19:12:12,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:12:12,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:12,816 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-24 19:12:12,816 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-10-24 19:12:12,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 33226058, now seen corresponding path program 1 times [2024-10-24 19:12:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:12,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172591505] [2024-10-24 19:12:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:12,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:12,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172591505] [2024-10-24 19:12:12,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172591505] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:12,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:12,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:12:12,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037142725] [2024-10-24 19:12:12,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:12,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:12:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:12,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:12:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:12:12,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 267 [2024-10-24 19:12:12,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 267 transitions, 561 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:12:12,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:12,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 267 [2024-10-24 19:12:12,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand