./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12_variant.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12_variant.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 0ff08c0361e0fdb1af5d85b333c023f31932563eeba591605f3b3b9ddd16afc8 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:30:43,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:30:43,147 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:30:43,155 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:30:43,156 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:30:43,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:30:43,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:30:43,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:30:43,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:30:43,188 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:30:43,189 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:30:43,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:30:43,189 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:30:43,191 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:30:43,192 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:30:43,192 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:30:43,192 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:30:43,193 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:30:43,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:30:43,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:30:43,194 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:30:43,197 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:30:43,197 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:30:43,198 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:30:43,198 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:30:43,198 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:30:43,198 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:30:43,198 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:30:43,199 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:30:43,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:30:43,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:30:43,199 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:30:43,199 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:30:43,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:30:43,200 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:30:43,200 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:30:43,202 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:30:43,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:30:43,202 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:30:43,202 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:30:43,203 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:30:43,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:30:43,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ff08c0361e0fdb1af5d85b333c023f31932563eeba591605f3b3b9ddd16afc8 [2024-11-20 17:30:43,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:30:43,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:30:43,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:30:43,494 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:30:43,496 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:30:43,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12_variant.i [2024-11-20 17:30:44,915 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:30:45,213 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:30:45,214 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12_variant.i [2024-11-20 17:30:45,230 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f81386dd/287423875d0c4585abefe18bb31907b4/FLAG2a735db85 [2024-11-20 17:30:45,242 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f81386dd/287423875d0c4585abefe18bb31907b4 [2024-11-20 17:30:45,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:30:45,245 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:30:45,246 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:30:45,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:30:45,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:30:45,252 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:45,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@360d062e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45, skipping insertion in model container [2024-11-20 17:30:45,253 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:45,305 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:30:45,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:30:45,807 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:30:45,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:30:45,927 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:30:45,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45 WrapperNode [2024-11-20 17:30:45,927 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:30:45,928 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:30:45,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:30:45,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:30:45,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:45,950 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:45,972 INFO L138 Inliner]: procedures = 272, calls = 22, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2024-11-20 17:30:45,973 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:30:45,975 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:30:45,975 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:30:45,976 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:30:45,985 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:45,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:45,988 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:46,002 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 5, 3]. 50 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-11-20 17:30:46,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:46,003 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:46,009 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:46,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:46,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:46,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:46,018 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:30:46,019 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:30:46,019 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:30:46,019 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:30:46,020 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (1/1) ... [2024-11-20 17:30:46,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:30:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:30:46,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:30:46,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:30:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2024-11-20 17:30:46,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2024-11-20 17:30:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-20 17:30:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:30:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:30:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 17:30:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:30:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:30:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 17:30:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-20 17:30:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:30:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:30:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:30:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:30:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 17:30:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:30:46,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:30:46,103 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:30:46,266 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:30:46,268 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:30:46,513 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:30:46,513 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:30:46,684 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:30:46,686 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-20 17:30:46,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:30:46 BoogieIcfgContainer [2024-11-20 17:30:46,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:30:46,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:30:46,690 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:30:46,693 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:30:46,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:30:45" (1/3) ... [2024-11-20 17:30:46,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380f2166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:30:46, skipping insertion in model container [2024-11-20 17:30:46,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:45" (2/3) ... [2024-11-20 17:30:46,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380f2166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:30:46, skipping insertion in model container [2024-11-20 17:30:46,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:30:46" (3/3) ... [2024-11-20 17:30:46,697 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant.i [2024-11-20 17:30:46,716 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:30:46,716 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-11-20 17:30:46,716 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:30:46,762 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:30:46,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 32 transitions, 68 flow [2024-11-20 17:30:46,826 INFO L124 PetriNetUnfolderBase]: 3/36 cut-off events. [2024-11-20 17:30:46,827 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:30:46,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 3/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-20 17:30:46,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 32 transitions, 68 flow [2024-11-20 17:30:46,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 32 transitions, 68 flow [2024-11-20 17:30:46,844 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:30:46,853 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;@414e58a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:30:46,854 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-11-20 17:30:46,857 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:30:46,857 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:30:46,857 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:30:46,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:30:46,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:30:46,859 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-20 17:30:46,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:30:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash 265316, now seen corresponding path program 1 times [2024-11-20 17:30:46,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:30:46,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085711596] [2024-11-20 17:30:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:30:46,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:30:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:30:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:30:47,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:30:47,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085711596] [2024-11-20 17:30:47,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085711596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:30:47,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:30:47,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:30:47,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932500203] [2024-11-20 17:30:47,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:30:47,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 17:30:47,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:30:47,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 17:30:47,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 17:30:47,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 32 [2024-11-20 17:30:47,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 68 flow. Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:47,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:30:47,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 32 [2024-11-20 17:30:47,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:30:47,224 INFO L124 PetriNetUnfolderBase]: 17/84 cut-off events. [2024-11-20 17:30:47,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:30:47,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 84 events. 17/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 267 event pairs, 14 based on Foata normal form. 6/75 useless extension candidates. Maximal degree in co-relation 119. Up to 44 conditions per place. [2024-11-20 17:30:47,227 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 12 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2024-11-20 17:30:47,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 80 flow [2024-11-20 17:30:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 17:30:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 17:30:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 45 transitions. [2024-11-20 17:30:47,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.703125 [2024-11-20 17:30:47,239 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 68 flow. Second operand 2 states and 45 transitions. [2024-11-20 17:30:47,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 80 flow [2024-11-20 17:30:47,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:30:47,243 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 56 flow [2024-11-20 17:30:47,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-11-20 17:30:47,248 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2024-11-20 17:30:47,248 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 56 flow [2024-11-20 17:30:47,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:47,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:30:47,249 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-20 17:30:47,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:30:47,249 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-20 17:30:47,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:30:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -685598034, now seen corresponding path program 1 times [2024-11-20 17:30:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:30:47,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577900518] [2024-11-20 17:30:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:30:47,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:30:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:30:47,283 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:30:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:30:47,316 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:30:47,317 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:30:47,318 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-11-20 17:30:47,320 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (14 of 16 remaining) [2024-11-20 17:30:47,320 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2024-11-20 17:30:47,321 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2024-11-20 17:30:47,321 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-11-20 17:30:47,321 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-11-20 17:30:47,321 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2024-11-20 17:30:47,322 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-11-20 17:30:47,322 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (7 of 16 remaining) [2024-11-20 17:30:47,322 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2024-11-20 17:30:47,322 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-11-20 17:30:47,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-11-20 17:30:47,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2024-11-20 17:30:47,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2024-11-20 17:30:47,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2024-11-20 17:30:47,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-11-20 17:30:47,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:30:47,324 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-20 17:30:47,327 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:30:47,327 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-20 17:30:47,368 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:30:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 57 transitions, 124 flow [2024-11-20 17:30:47,392 INFO L124 PetriNetUnfolderBase]: 6/66 cut-off events. [2024-11-20 17:30:47,392 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:30:47,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 66 events. 6/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 174 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 53. Up to 3 conditions per place. [2024-11-20 17:30:47,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 57 transitions, 124 flow [2024-11-20 17:30:47,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 57 transitions, 124 flow [2024-11-20 17:30:47,400 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:30:47,403 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;@414e58a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:30:47,403 INFO L334 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2024-11-20 17:30:47,405 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:30:47,405 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:30:47,405 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:30:47,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:30:47,405 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:30:47,406 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-20 17:30:47,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:30:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash 321917, now seen corresponding path program 1 times [2024-11-20 17:30:47,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:30:47,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977033884] [2024-11-20 17:30:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:30:47,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:30:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:30:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:30:47,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:30:47,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977033884] [2024-11-20 17:30:47,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977033884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:30:47,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:30:47,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:30:47,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515194706] [2024-11-20 17:30:47,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:30:47,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 17:30:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:30:47,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 17:30:47,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 17:30:47,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 57 [2024-11-20 17:30:47,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:47,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:30:47,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 57 [2024-11-20 17:30:47,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:30:47,770 INFO L124 PetriNetUnfolderBase]: 409/1275 cut-off events. [2024-11-20 17:30:47,771 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-20 17:30:47,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1956 conditions, 1275 events. 409/1275 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8914 event pairs, 325 based on Foata normal form. 114/1104 useless extension candidates. Maximal degree in co-relation 1448. Up to 652 conditions per place. [2024-11-20 17:30:47,788 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 21 selfloop transitions, 0 changer transitions 0/48 dead transitions. [2024-11-20 17:30:47,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 148 flow [2024-11-20 17:30:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 17:30:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 17:30:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 82 transitions. [2024-11-20 17:30:47,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7192982456140351 [2024-11-20 17:30:47,792 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 124 flow. Second operand 2 states and 82 transitions. [2024-11-20 17:30:47,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 148 flow [2024-11-20 17:30:47,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:30:47,794 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 106 flow [2024-11-20 17:30:47,796 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-11-20 17:30:47,796 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2024-11-20 17:30:47,797 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 106 flow [2024-11-20 17:30:47,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:47,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:30:47,798 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-20 17:30:47,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:30:47,798 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-20 17:30:47,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:30:47,799 INFO L85 PathProgramCache]: Analyzing trace with hash -910682474, now seen corresponding path program 1 times [2024-11-20 17:30:47,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:30:47,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493844814] [2024-11-20 17:30:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:30:47,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:30:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:30:47,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:30:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:30:47,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:30:47,861 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:30:47,862 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2024-11-20 17:30:47,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (21 of 23 remaining) [2024-11-20 17:30:47,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2024-11-20 17:30:47,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2024-11-20 17:30:47,863 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2024-11-20 17:30:47,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2024-11-20 17:30:47,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2024-11-20 17:30:47,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2024-11-20 17:30:47,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (14 of 23 remaining) [2024-11-20 17:30:47,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2024-11-20 17:30:47,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2024-11-20 17:30:47,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2024-11-20 17:30:47,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2024-11-20 17:30:47,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2024-11-20 17:30:47,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2024-11-20 17:30:47,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2024-11-20 17:30:47,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2024-11-20 17:30:47,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2024-11-20 17:30:47,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2024-11-20 17:30:47,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2024-11-20 17:30:47,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2024-11-20 17:30:47,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2024-11-20 17:30:47,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 23 remaining) [2024-11-20 17:30:47,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:30:47,871 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-20 17:30:47,871 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:30:47,872 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-20 17:30:47,913 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:30:47,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 82 transitions, 182 flow [2024-11-20 17:30:47,930 INFO L124 PetriNetUnfolderBase]: 9/96 cut-off events. [2024-11-20 17:30:47,931 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-20 17:30:47,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 9/96 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 323 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2024-11-20 17:30:47,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 82 transitions, 182 flow [2024-11-20 17:30:47,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 82 transitions, 182 flow [2024-11-20 17:30:47,936 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:30:47,938 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;@414e58a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:30:47,938 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-20 17:30:47,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:30:47,940 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:30:47,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:30:47,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:30:47,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:30:47,941 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-20 17:30:47,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:30:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash 403343, now seen corresponding path program 1 times [2024-11-20 17:30:47,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:30:47,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756624110] [2024-11-20 17:30:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:30:47,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:30:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:30:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:30:47,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:30:47,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756624110] [2024-11-20 17:30:47,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756624110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:30:47,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:30:47,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:30:47,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473841666] [2024-11-20 17:30:47,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:30:47,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 17:30:47,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:30:47,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 17:30:47,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 17:30:47,980 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 82 [2024-11-20 17:30:47,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:47,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:30:47,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 82 [2024-11-20 17:30:47,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:30:49,573 INFO L124 PetriNetUnfolderBase]: 6301/15930 cut-off events. [2024-11-20 17:30:49,574 INFO L125 PetriNetUnfolderBase]: For 506/506 co-relation queries the response was YES. [2024-11-20 17:30:49,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24790 conditions, 15930 events. 6301/15930 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 165879 event pairs, 4948 based on Foata normal form. 1572/13856 useless extension candidates. Maximal degree in co-relation 7164. Up to 8542 conditions per place. [2024-11-20 17:30:49,707 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 30 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2024-11-20 17:30:49,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 218 flow [2024-11-20 17:30:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 17:30:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 17:30:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 119 transitions. [2024-11-20 17:30:49,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.725609756097561 [2024-11-20 17:30:49,709 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 182 flow. Second operand 2 states and 119 transitions. [2024-11-20 17:30:49,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 218 flow [2024-11-20 17:30:49,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 216 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-20 17:30:49,712 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 156 flow [2024-11-20 17:30:49,712 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-11-20 17:30:49,713 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2024-11-20 17:30:49,713 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 156 flow [2024-11-20 17:30:49,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:49,714 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:30:49,714 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:30:49,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:30:49,714 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-20 17:30:49,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:30:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash -581813182, now seen corresponding path program 1 times [2024-11-20 17:30:49,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:30:49,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431555227] [2024-11-20 17:30:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:30:49,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:30:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:30:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:30:49,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:30:49,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431555227] [2024-11-20 17:30:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431555227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:30:49,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:30:49,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:30:49,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445651245] [2024-11-20 17:30:49,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:30:49,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:30:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:30:49,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:30:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:30:49,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 82 [2024-11-20 17:30:49,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:49,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:30:49,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 82 [2024-11-20 17:30:49,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:30:51,687 INFO L124 PetriNetUnfolderBase]: 11513/20722 cut-off events. [2024-11-20 17:30:51,687 INFO L125 PetriNetUnfolderBase]: For 419/419 co-relation queries the response was YES. [2024-11-20 17:30:51,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36718 conditions, 20722 events. 11513/20722 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 168427 event pairs, 9521 based on Foata normal form. 0/20537 useless extension candidates. Maximal degree in co-relation 36712. Up to 15622 conditions per place. [2024-11-20 17:30:51,824 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 35 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2024-11-20 17:30:51,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 210 flow [2024-11-20 17:30:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:30:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:30:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-11-20 17:30:51,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-20 17:30:51,829 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 156 flow. Second operand 3 states and 123 transitions. [2024-11-20 17:30:51,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 210 flow [2024-11-20 17:30:51,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:30:51,834 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 140 flow [2024-11-20 17:30:51,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-11-20 17:30:51,835 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -12 predicate places. [2024-11-20 17:30:51,835 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 140 flow [2024-11-20 17:30:51,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:51,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:30:51,836 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:30:51,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:30:51,837 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-20 17:30:51,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:30:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash -581813181, now seen corresponding path program 1 times [2024-11-20 17:30:51,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:30:51,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754233186] [2024-11-20 17:30:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:30:51,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:30:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:30:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:30:52,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:30:52,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754233186] [2024-11-20 17:30:52,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754233186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:30:52,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:30:52,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:30:52,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839928012] [2024-11-20 17:30:52,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:30:52,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:30:52,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:30:52,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:30:52,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:30:52,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 82 [2024-11-20 17:30:52,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 36.5) internal successors, (219), 6 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:52,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:30:52,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 82 [2024-11-20 17:30:52,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:30:54,137 INFO L124 PetriNetUnfolderBase]: 11575/22683 cut-off events. [2024-11-20 17:30:54,137 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-11-20 17:30:54,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38908 conditions, 22683 events. 11575/22683 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 206922 event pairs, 2206 based on Foata normal form. 0/19812 useless extension candidates. Maximal degree in co-relation 38901. Up to 6074 conditions per place. [2024-11-20 17:30:54,278 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 89 selfloop transitions, 12 changer transitions 0/126 dead transitions. [2024-11-20 17:30:54,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 126 transitions, 512 flow [2024-11-20 17:30:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:30:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:30:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 314 transitions. [2024-11-20 17:30:54,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-11-20 17:30:54,280 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 140 flow. Second operand 6 states and 314 transitions. [2024-11-20 17:30:54,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 126 transitions, 512 flow [2024-11-20 17:30:54,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 126 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:30:54,286 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 213 flow [2024-11-20 17:30:54,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2024-11-20 17:30:54,287 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2024-11-20 17:30:54,287 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 213 flow [2024-11-20 17:30:54,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.5) internal successors, (219), 6 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:54,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:30:54,288 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-11-20 17:30:54,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:30:54,288 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-20 17:30:54,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:30:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash -802830355, now seen corresponding path program 1 times [2024-11-20 17:30:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:30:54,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50869323] [2024-11-20 17:30:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:30:54,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:30:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:30:54,306 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:30:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:30:54,327 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:30:54,328 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:30:54,328 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (29 of 30 remaining) [2024-11-20 17:30:54,328 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (28 of 30 remaining) [2024-11-20 17:30:54,328 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 30 remaining) [2024-11-20 17:30:54,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 30 remaining) [2024-11-20 17:30:54,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 30 remaining) [2024-11-20 17:30:54,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 30 remaining) [2024-11-20 17:30:54,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 30 remaining) [2024-11-20 17:30:54,329 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 30 remaining) [2024-11-20 17:30:54,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (21 of 30 remaining) [2024-11-20 17:30:54,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 30 remaining) [2024-11-20 17:30:54,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 30 remaining) [2024-11-20 17:30:54,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 30 remaining) [2024-11-20 17:30:54,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 30 remaining) [2024-11-20 17:30:54,330 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 30 remaining) [2024-11-20 17:30:54,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 30 remaining) [2024-11-20 17:30:54,331 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (14 of 30 remaining) [2024-11-20 17:30:54,333 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 30 remaining) [2024-11-20 17:30:54,333 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 30 remaining) [2024-11-20 17:30:54,333 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 30 remaining) [2024-11-20 17:30:54,333 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 30 remaining) [2024-11-20 17:30:54,333 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 30 remaining) [2024-11-20 17:30:54,333 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 30 remaining) [2024-11-20 17:30:54,333 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (7 of 30 remaining) [2024-11-20 17:30:54,334 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 30 remaining) [2024-11-20 17:30:54,334 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 30 remaining) [2024-11-20 17:30:54,334 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 30 remaining) [2024-11-20 17:30:54,334 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 30 remaining) [2024-11-20 17:30:54,334 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 30 remaining) [2024-11-20 17:30:54,334 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 30 remaining) [2024-11-20 17:30:54,334 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 30 remaining) [2024-11-20 17:30:54,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:30:54,335 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-20 17:30:54,335 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:30:54,335 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-20 17:30:54,381 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:30:54,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 107 transitions, 242 flow [2024-11-20 17:30:54,395 INFO L124 PetriNetUnfolderBase]: 12/126 cut-off events. [2024-11-20 17:30:54,395 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-20 17:30:54,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 126 events. 12/126 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 462 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 108. Up to 5 conditions per place. [2024-11-20 17:30:54,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 107 transitions, 242 flow [2024-11-20 17:30:54,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 107 transitions, 242 flow [2024-11-20 17:30:54,399 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:30:54,401 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;@414e58a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:30:54,402 INFO L334 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2024-11-20 17:30:54,403 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:30:54,403 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:30:54,403 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:30:54,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:30:54,403 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:30:54,404 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-20 17:30:54,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:30:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash 509594, now seen corresponding path program 1 times [2024-11-20 17:30:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:30:54,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822798619] [2024-11-20 17:30:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:30:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:30:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:30:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:30:54,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:30:54,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822798619] [2024-11-20 17:30:54,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822798619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:30:54,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:30:54,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:30:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693000904] [2024-11-20 17:30:54,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:30:54,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 17:30:54,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:30:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 17:30:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 17:30:54,418 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-20 17:30:54,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 107 transitions, 242 flow. Second operand has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:30:54,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:30:54,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-20 17:30:54,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:31:06,618 INFO L124 PetriNetUnfolderBase]: 79731/172664 cut-off events. [2024-11-20 17:31:06,618 INFO L125 PetriNetUnfolderBase]: For 7903/7903 co-relation queries the response was YES. [2024-11-20 17:31:06,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276351 conditions, 172664 events. 79731/172664 cut-off events. For 7903/7903 co-relation queries the response was YES. Maximal size of possible extension queue 5970. Compared 2223909 event pairs, 62793 based on Foata normal form. 18627/154596 useless extension candidates. Maximal degree in co-relation 26460. Up to 100038 conditions per place. [2024-11-20 17:31:08,124 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 39 selfloop transitions, 0 changer transitions 0/92 dead transitions. [2024-11-20 17:31:08,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 290 flow [2024-11-20 17:31:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 17:31:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 17:31:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2024-11-20 17:31:08,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7289719626168224 [2024-11-20 17:31:08,125 INFO L175 Difference]: Start difference. First operand has 104 places, 107 transitions, 242 flow. Second operand 2 states and 156 transitions. [2024-11-20 17:31:08,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 290 flow [2024-11-20 17:31:08,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 284 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-20 17:31:08,132 INFO L231 Difference]: Finished difference. Result has 98 places, 92 transitions, 206 flow [2024-11-20 17:31:08,132 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=206, PETRI_PLACES=98, PETRI_TRANSITIONS=92} [2024-11-20 17:31:08,133 INFO L277 CegarLoopForPetriNet]: 104 programPoint places, -6 predicate places. [2024-11-20 17:31:08,133 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 92 transitions, 206 flow [2024-11-20 17:31:08,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:31:08,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:31:08,134 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:31:08,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:31:08,134 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-20 17:31:08,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:31:08,135 INFO L85 PathProgramCache]: Analyzing trace with hash -239057910, now seen corresponding path program 1 times [2024-11-20 17:31:08,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:31:08,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085390593] [2024-11-20 17:31:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:31:08,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:31:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:31:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:31:08,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:31:08,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085390593] [2024-11-20 17:31:08,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085390593] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:31:08,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:31:08,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:31:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418422819] [2024-11-20 17:31:08,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:31:08,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:31:08,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:31:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:31:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:31:08,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 107 [2024-11-20 17:31:08,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 92 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:31:08,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:31:08,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 107 [2024-11-20 17:31:08,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:31:26,936 INFO L124 PetriNetUnfolderBase]: 176287/279039 cut-off events. [2024-11-20 17:31:26,936 INFO L125 PetriNetUnfolderBase]: For 5065/5065 co-relation queries the response was YES. [2024-11-20 17:31:27,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504744 conditions, 279039 events. 176287/279039 cut-off events. For 5065/5065 co-relation queries the response was YES. Maximal size of possible extension queue 7436. Compared 2643228 event pairs, 146047 based on Foata normal form. 0/276827 useless extension candidates. Maximal degree in co-relation 504737. Up to 221589 conditions per place. [2024-11-20 17:31:28,581 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 46 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2024-11-20 17:31:28,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 80 transitions, 276 flow [2024-11-20 17:31:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:31:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:31:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-11-20 17:31:28,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5015576323987538 [2024-11-20 17:31:28,583 INFO L175 Difference]: Start difference. First operand has 98 places, 92 transitions, 206 flow. Second operand 3 states and 161 transitions. [2024-11-20 17:31:28,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 80 transitions, 276 flow [2024-11-20 17:31:28,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 80 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:31:28,597 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 184 flow [2024-11-20 17:31:28,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2024-11-20 17:31:28,598 INFO L277 CegarLoopForPetriNet]: 104 programPoint places, -16 predicate places. [2024-11-20 17:31:28,599 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 184 flow [2024-11-20 17:31:28,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:31:28,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:31:28,599 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:31:28,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 17:31:28,599 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2024-11-20 17:31:28,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:31:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash -239057909, now seen corresponding path program 1 times [2024-11-20 17:31:28,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:31:28,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689690259] [2024-11-20 17:31:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:31:28,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:31:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:31:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:31:28,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:31:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689690259] [2024-11-20 17:31:28,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689690259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:31:28,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:31:28,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:31:28,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186982665] [2024-11-20 17:31:28,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:31:28,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:31:28,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:31:28,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:31:28,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:31:29,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 107 [2024-11-20 17:31:29,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 51.5) internal successors, (309), 6 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:31:29,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:31:29,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 107 [2024-11-20 17:31:29,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand