./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-ext/09_fmaxsym-zero.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym-zero.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 41cf9d90b654ba629ed26494b45977a61fd5035aced9f092d4e43a94133522bd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 18:52:26,119 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 18:52:26,171 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 18:52:26,174 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 18:52:26,174 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 18:52:26,193 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 18:52:26,195 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 18:52:26,196 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 18:52:26,196 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 18:52:26,197 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 18:52:26,197 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 18:52:26,197 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 18:52:26,198 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 18:52:26,198 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 18:52:26,198 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 18:52:26,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 18:52:26,199 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 18:52:26,199 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 18:52:26,199 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 18:52:26,200 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 18:52:26,200 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 18:52:26,200 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 18:52:26,201 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 18:52:26,201 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 18:52:26,201 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 18:52:26,201 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 18:52:26,202 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 18:52:26,202 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 18:52:26,202 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 18:52:26,202 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 18:52:26,202 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 18:52:26,203 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 18:52:26,203 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 18:52:26,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 18:52:26,203 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 18:52:26,204 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 18:52:26,204 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 18:52:26,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 18:52:26,204 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 18:52:26,204 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 18:52:26,204 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 18:52:26,205 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 18:52:26,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41cf9d90b654ba629ed26494b45977a61fd5035aced9f092d4e43a94133522bd [2024-10-24 18:52:26,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 18:52:26,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 18:52:26,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 18:52:26,524 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 18:52:26,525 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 18:52:26,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym-zero.i [2024-10-24 18:52:27,946 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 18:52:28,206 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 18:52:28,207 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym-zero.i [2024-10-24 18:52:28,222 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a2035626/94fa05e95e034138863e57b1f91cc6a1/FLAGfa831a47e [2024-10-24 18:52:28,235 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a2035626/94fa05e95e034138863e57b1f91cc6a1 [2024-10-24 18:52:28,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 18:52:28,238 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 18:52:28,241 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 18:52:28,241 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 18:52:28,245 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 18:52:28,246 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b612e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28, skipping insertion in model container [2024-10-24 18:52:28,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,290 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 18:52:28,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 18:52:28,637 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 18:52:28,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 18:52:28,707 INFO L204 MainTranslator]: Completed translation [2024-10-24 18:52:28,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28 WrapperNode [2024-10-24 18:52:28,708 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 18:52:28,708 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 18:52:28,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 18:52:28,709 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 18:52:28,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,730 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,748 INFO L138 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-10-24 18:52:28,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 18:52:28,749 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 18:52:28,749 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 18:52:28,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 18:52:28,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,768 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,788 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 0 writes are split as follows [0, 0, 0]. [2024-10-24 18:52:28,789 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,789 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 18:52:28,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 18:52:28,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 18:52:28,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 18:52:28,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (1/1) ... [2024-10-24 18:52:28,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 18:52:28,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:52:28,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 18:52:28,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 18:52:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 18:52:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 18:52:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 18:52:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-24 18:52:28,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-24 18:52:28,898 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 18:52:28,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 18:52:28,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 18:52:28,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 18:52:28,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 18:52:28,899 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 18:52:28,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 18:52:28,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 18:52:28,902 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 18:52:28,993 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 18:52:28,995 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 18:52:29,101 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 18:52:29,101 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 18:52:29,209 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 18:52:29,210 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 18:52:29,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:52:29 BoogieIcfgContainer [2024-10-24 18:52:29,210 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 18:52:29,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 18:52:29,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 18:52:29,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 18:52:29,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:52:28" (1/3) ... [2024-10-24 18:52:29,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af77608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:52:29, skipping insertion in model container [2024-10-24 18:52:29,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:52:28" (2/3) ... [2024-10-24 18:52:29,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af77608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:52:29, skipping insertion in model container [2024-10-24 18:52:29,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:52:29" (3/3) ... [2024-10-24 18:52:29,218 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym-zero.i [2024-10-24 18:52:29,231 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 18:52:29,231 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-10-24 18:52:29,231 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 18:52:29,271 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 18:52:29,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 26 transitions, 56 flow [2024-10-24 18:52:29,319 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2024-10-24 18:52:29,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 18:52:29,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 30 events. 3/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 46 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-10-24 18:52:29,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 26 transitions, 56 flow [2024-10-24 18:52:29,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 26 transitions, 56 flow [2024-10-24 18:52:29,330 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 18:52:29,334 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;@25297f12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 18:52:29,334 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-24 18:52:29,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 18:52:29,337 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-24 18:52:29,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 18:52:29,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:29,338 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 18:52:29,338 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2024-10-24 18:52:29,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash 244804, now seen corresponding path program 1 times [2024-10-24 18:52:29,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:29,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538339199] [2024-10-24 18:52:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:29,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:29,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538339199] [2024-10-24 18:52:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538339199] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:29,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:29,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 18:52:29,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858124088] [2024-10-24 18:52:29,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:29,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 18:52:29,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:29,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 18:52:29,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 18:52:29,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2024-10-24 18:52:29,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:29,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:29,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2024-10-24 18:52:29,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:29,537 INFO L124 PetriNetUnfolderBase]: 17/61 cut-off events. [2024-10-24 18:52:29,537 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 18:52:29,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 61 events. 17/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 143 event pairs, 14 based on Foata normal form. 6/65 useless extension candidates. Maximal degree in co-relation 95. Up to 44 conditions per place. [2024-10-24 18:52:29,569 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 12 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2024-10-24 18:52:29,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 20 transitions, 68 flow [2024-10-24 18:52:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 18:52:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-24 18:52:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 33 transitions. [2024-10-24 18:52:29,580 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-10-24 18:52:29,581 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 56 flow. Second operand 2 states and 33 transitions. [2024-10-24 18:52:29,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 20 transitions, 68 flow [2024-10-24 18:52:29,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 68 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 18:52:29,585 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 44 flow [2024-10-24 18:52:29,586 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-10-24 18:52:29,589 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2024-10-24 18:52:29,589 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 44 flow [2024-10-24 18:52:29,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:29,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:29,590 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-24 18:52:29,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 18:52:29,590 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2024-10-24 18:52:29,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:29,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1296805901, now seen corresponding path program 1 times [2024-10-24 18:52:29,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:29,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894760639] [2024-10-24 18:52:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:29,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 18:52:29,613 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 18:52:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 18:52:29,638 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 18:52:29,638 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 18:52:29,639 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-10-24 18:52:29,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-10-24 18:52:29,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-10-24 18:52:29,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2024-10-24 18:52:29,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2024-10-24 18:52:29,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2024-10-24 18:52:29,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2024-10-24 18:52:29,642 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-10-24 18:52:29,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 18:52:29,642 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-24 18:52:29,644 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 18:52:29,644 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 18:52:29,664 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 18:52:29,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 45 transitions, 100 flow [2024-10-24 18:52:29,674 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2024-10-24 18:52:29,674 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 18:52:29,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 54 events. 6/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 119 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 41. Up to 3 conditions per place. [2024-10-24 18:52:29,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 45 transitions, 100 flow [2024-10-24 18:52:29,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 45 transitions, 100 flow [2024-10-24 18:52:29,677 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 18:52:29,678 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;@25297f12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 18:52:29,678 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-10-24 18:52:29,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 18:52:29,679 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-24 18:52:29,680 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 18:52:29,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:29,680 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 18:52:29,680 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-10-24 18:52:29,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash 289489, now seen corresponding path program 1 times [2024-10-24 18:52:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:29,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627568728] [2024-10-24 18:52:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:29,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:29,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627568728] [2024-10-24 18:52:29,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627568728] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:29,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:29,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 18:52:29,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037933461] [2024-10-24 18:52:29,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:29,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 18:52:29,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 18:52:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 18:52:29,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-10-24 18:52:29,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 100 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:29,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:29,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-10-24 18:52:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:29,841 INFO L124 PetriNetUnfolderBase]: 345/768 cut-off events. [2024-10-24 18:52:29,841 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-24 18:52:29,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361 conditions, 768 events. 345/768 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4069 event pairs, 294 based on Foata normal form. 99/840 useless extension candidates. Maximal degree in co-relation 757. Up to 564 conditions per place. [2024-10-24 18:52:29,847 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 21 selfloop transitions, 0 changer transitions 0/36 dead transitions. [2024-10-24 18:52:29,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 124 flow [2024-10-24 18:52:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 18:52:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-24 18:52:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 58 transitions. [2024-10-24 18:52:29,849 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-10-24 18:52:29,849 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 100 flow. Second operand 2 states and 58 transitions. [2024-10-24 18:52:29,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 124 flow [2024-10-24 18:52:29,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 18:52:29,850 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 82 flow [2024-10-24 18:52:29,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-10-24 18:52:29,851 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2024-10-24 18:52:29,855 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 82 flow [2024-10-24 18:52:29,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:29,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:29,855 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 18:52:29,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 18:52:29,856 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-10-24 18:52:29,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:29,856 INFO L85 PathProgramCache]: Analyzing trace with hash 35024672, now seen corresponding path program 1 times [2024-10-24 18:52:29,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:29,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488380996] [2024-10-24 18:52:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:29,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:29,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:29,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488380996] [2024-10-24 18:52:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488380996] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:29,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:29,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 18:52:29,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475945616] [2024-10-24 18:52:29,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:29,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:52:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:52:29,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:52:29,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-24 18:52:29,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:29,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:29,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-24 18:52:29,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:30,094 INFO L124 PetriNetUnfolderBase]: 345/753 cut-off events. [2024-10-24 18:52:30,094 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-24 18:52:30,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 753 events. 345/753 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3913 event pairs, 294 based on Foata normal form. 0/741 useless extension candidates. Maximal degree in co-relation 1342. Up to 563 conditions per place. [2024-10-24 18:52:30,098 INFO L140 encePairwiseOnDemand]: 42/45 looper letters, 20 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2024-10-24 18:52:30,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 120 flow [2024-10-24 18:52:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:52:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:52:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-10-24 18:52:30,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-10-24 18:52:30,100 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 82 flow. Second operand 3 states and 65 transitions. [2024-10-24 18:52:30,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 120 flow [2024-10-24 18:52:30,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 18:52:30,102 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 80 flow [2024-10-24 18:52:30,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-10-24 18:52:30,103 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2024-10-24 18:52:30,103 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 80 flow [2024-10-24 18:52:30,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:30,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:30,103 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 18:52:30,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 18:52:30,104 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-10-24 18:52:30,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash 35024673, now seen corresponding path program 1 times [2024-10-24 18:52:30,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:30,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365168194] [2024-10-24 18:52:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:30,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:30,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:30,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365168194] [2024-10-24 18:52:30,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365168194] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:30,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:30,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:52:30,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848201561] [2024-10-24 18:52:30,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:30,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:52:30,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:52:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:52:30,291 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-10-24 18:52:30,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:30,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:30,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-10-24 18:52:30,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:30,498 INFO L124 PetriNetUnfolderBase]: 646/1368 cut-off events. [2024-10-24 18:52:30,498 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-10-24 18:52:30,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1368 events. 646/1368 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7707 event pairs, 188 based on Foata normal form. 27/1362 useless extension candidates. Maximal degree in co-relation 2469. Up to 420 conditions per place. [2024-10-24 18:52:30,505 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 45 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-10-24 18:52:30,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 62 transitions, 246 flow [2024-10-24 18:52:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 18:52:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 18:52:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-10-24 18:52:30,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5644444444444444 [2024-10-24 18:52:30,511 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 80 flow. Second operand 5 states and 127 transitions. [2024-10-24 18:52:30,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 62 transitions, 246 flow [2024-10-24 18:52:30,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:52:30,513 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 106 flow [2024-10-24 18:52:30,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2024-10-24 18:52:30,514 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-10-24 18:52:30,514 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 106 flow [2024-10-24 18:52:30,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:30,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:30,514 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-24 18:52:30,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 18:52:30,515 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-10-24 18:52:30,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1412544000, now seen corresponding path program 1 times [2024-10-24 18:52:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:30,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542989737] [2024-10-24 18:52:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:30,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 18:52:30,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 18:52:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 18:52:30,534 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 18:52:30,535 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 18:52:30,535 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2024-10-24 18:52:30,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2024-10-24 18:52:30,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2024-10-24 18:52:30,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 11 remaining) [2024-10-24 18:52:30,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2024-10-24 18:52:30,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2024-10-24 18:52:30,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2024-10-24 18:52:30,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2024-10-24 18:52:30,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2024-10-24 18:52:30,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2024-10-24 18:52:30,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2024-10-24 18:52:30,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 18:52:30,537 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-24 18:52:30,537 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 18:52:30,537 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 18:52:30,559 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 18:52:30,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 64 transitions, 146 flow [2024-10-24 18:52:30,566 INFO L124 PetriNetUnfolderBase]: 9/78 cut-off events. [2024-10-24 18:52:30,566 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-24 18:52:30,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 78 events. 9/78 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 220 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2024-10-24 18:52:30,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 64 transitions, 146 flow [2024-10-24 18:52:30,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 64 transitions, 146 flow [2024-10-24 18:52:30,568 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 18:52:30,569 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;@25297f12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 18:52:30,569 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-10-24 18:52:30,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 18:52:30,570 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-24 18:52:30,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 18:52:30,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:30,570 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 18:52:30,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-24 18:52:30,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:30,571 INFO L85 PathProgramCache]: Analyzing trace with hash 353041, now seen corresponding path program 1 times [2024-10-24 18:52:30,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:30,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22126408] [2024-10-24 18:52:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:30,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:30,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:30,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22126408] [2024-10-24 18:52:30,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22126408] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:30,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:30,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 18:52:30,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831745456] [2024-10-24 18:52:30,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:30,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 18:52:30,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:30,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 18:52:30,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 18:52:30,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 64 [2024-10-24 18:52:30,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 146 flow. Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:30,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:30,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 64 [2024-10-24 18:52:30,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:31,137 INFO L124 PetriNetUnfolderBase]: 4505/7972 cut-off events. [2024-10-24 18:52:31,137 INFO L125 PetriNetUnfolderBase]: For 466/466 co-relation queries the response was YES. [2024-10-24 18:52:31,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14518 conditions, 7972 events. 4505/7972 cut-off events. For 466/466 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 55825 event pairs, 3878 based on Foata normal form. 1212/8917 useless extension candidates. Maximal degree in co-relation 3003. Up to 6260 conditions per place. [2024-10-24 18:52:31,243 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 30 selfloop transitions, 0 changer transitions 0/52 dead transitions. [2024-10-24 18:52:31,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 182 flow [2024-10-24 18:52:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 18:52:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-24 18:52:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 83 transitions. [2024-10-24 18:52:31,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6484375 [2024-10-24 18:52:31,244 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 146 flow. Second operand 2 states and 83 transitions. [2024-10-24 18:52:31,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 182 flow [2024-10-24 18:52:31,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-24 18:52:31,246 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 120 flow [2024-10-24 18:52:31,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=120, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-10-24 18:52:31,247 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-10-24 18:52:31,249 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 120 flow [2024-10-24 18:52:31,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:31,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:31,250 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 18:52:31,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 18:52:31,250 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-24 18:52:31,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1928902094, now seen corresponding path program 1 times [2024-10-24 18:52:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:31,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190993910] [2024-10-24 18:52:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:31,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:31,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:31,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190993910] [2024-10-24 18:52:31,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190993910] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:31,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:31,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 18:52:31,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404956729] [2024-10-24 18:52:31,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:31,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:52:31,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:31,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:52:31,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:52:31,323 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 64 [2024-10-24 18:52:31,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:31,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:31,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 64 [2024-10-24 18:52:31,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:31,958 INFO L124 PetriNetUnfolderBase]: 4505/7861 cut-off events. [2024-10-24 18:52:31,958 INFO L125 PetriNetUnfolderBase]: For 278/278 co-relation queries the response was YES. [2024-10-24 18:52:31,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14344 conditions, 7861 events. 4505/7861 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 53975 event pairs, 3878 based on Foata normal form. 0/7705 useless extension candidates. Maximal degree in co-relation 14338. Up to 6259 conditions per place. [2024-10-24 18:52:32,005 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 29 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2024-10-24 18:52:32,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 174 flow [2024-10-24 18:52:32,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:52:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:52:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-10-24 18:52:32,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-10-24 18:52:32,007 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 120 flow. Second operand 3 states and 93 transitions. [2024-10-24 18:52:32,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 174 flow [2024-10-24 18:52:32,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 18:52:32,009 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 116 flow [2024-10-24 18:52:32,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-10-24 18:52:32,010 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-10-24 18:52:32,010 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 116 flow [2024-10-24 18:52:32,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:32,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:32,012 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 18:52:32,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 18:52:32,012 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-24 18:52:32,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:32,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1928902095, now seen corresponding path program 1 times [2024-10-24 18:52:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:32,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221095559] [2024-10-24 18:52:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:32,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:32,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221095559] [2024-10-24 18:52:32,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221095559] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:32,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:32,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:52:32,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034308015] [2024-10-24 18:52:32,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:32,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:52:32,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:32,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:52:32,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:52:32,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-10-24 18:52:32,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:32,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:32,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-10-24 18:52:32,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:33,229 INFO L124 PetriNetUnfolderBase]: 8446/14373 cut-off events. [2024-10-24 18:52:33,229 INFO L125 PetriNetUnfolderBase]: For 433/433 co-relation queries the response was YES. [2024-10-24 18:52:33,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26521 conditions, 14373 events. 8446/14373 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 104163 event pairs, 1830 based on Foata normal form. 219/14316 useless extension candidates. Maximal degree in co-relation 26514. Up to 4692 conditions per place. [2024-10-24 18:52:33,302 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 72 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2024-10-24 18:52:33,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 95 transitions, 382 flow [2024-10-24 18:52:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 18:52:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 18:52:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-10-24 18:52:33,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-10-24 18:52:33,304 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 116 flow. Second operand 5 states and 189 transitions. [2024-10-24 18:52:33,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 95 transitions, 382 flow [2024-10-24 18:52:33,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 95 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:52:33,306 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 142 flow [2024-10-24 18:52:33,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2024-10-24 18:52:33,307 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2024-10-24 18:52:33,307 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 142 flow [2024-10-24 18:52:33,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:33,307 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:33,308 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:52:33,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 18:52:33,308 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-24 18:52:33,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash 399991008, now seen corresponding path program 1 times [2024-10-24 18:52:33,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:33,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914568828] [2024-10-24 18:52:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 18:52:33,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:33,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914568828] [2024-10-24 18:52:33,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914568828] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:33,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:33,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:52:33,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272004673] [2024-10-24 18:52:33,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:33,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:52:33,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:52:33,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:52:33,471 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-10-24 18:52:33,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:33,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:33,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-10-24 18:52:33,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:35,173 INFO L124 PetriNetUnfolderBase]: 14743/24832 cut-off events. [2024-10-24 18:52:35,173 INFO L125 PetriNetUnfolderBase]: For 5578/5944 co-relation queries the response was YES. [2024-10-24 18:52:35,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49667 conditions, 24832 events. 14743/24832 cut-off events. For 5578/5944 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 191325 event pairs, 3306 based on Foata normal form. 378/24708 useless extension candidates. Maximal degree in co-relation 49658. Up to 8148 conditions per place. [2024-10-24 18:52:35,353 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 76 selfloop transitions, 5 changer transitions 0/99 dead transitions. [2024-10-24 18:52:35,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 99 transitions, 446 flow [2024-10-24 18:52:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 18:52:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 18:52:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-10-24 18:52:35,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-10-24 18:52:35,355 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 142 flow. Second operand 5 states and 187 transitions. [2024-10-24 18:52:35,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 99 transitions, 446 flow [2024-10-24 18:52:35,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:52:35,366 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 168 flow [2024-10-24 18:52:35,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2024-10-24 18:52:35,367 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-10-24 18:52:35,368 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 168 flow [2024-10-24 18:52:35,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:35,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:35,369 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-24 18:52:35,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 18:52:35,369 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-24 18:52:35,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash 205461074, now seen corresponding path program 1 times [2024-10-24 18:52:35,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582018337] [2024-10-24 18:52:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 18:52:35,380 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 18:52:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 18:52:35,391 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 18:52:35,394 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 18:52:35,395 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2024-10-24 18:52:35,396 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-10-24 18:52:35,396 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-10-24 18:52:35,396 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (10 of 14 remaining) [2024-10-24 18:52:35,396 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 14 remaining) [2024-10-24 18:52:35,396 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-10-24 18:52:35,396 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-10-24 18:52:35,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-10-24 18:52:35,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2024-10-24 18:52:35,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2024-10-24 18:52:35,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2024-10-24 18:52:35,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-10-24 18:52:35,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-10-24 18:52:35,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2024-10-24 18:52:35,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-24 18:52:35,398 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-10-24 18:52:35,399 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 18:52:35,399 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-24 18:52:35,644 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 18:52:35,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 194 flow [2024-10-24 18:52:35,660 INFO L124 PetriNetUnfolderBase]: 12/102 cut-off events. [2024-10-24 18:52:35,660 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-24 18:52:35,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 102 events. 12/102 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 330 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 90. Up to 5 conditions per place. [2024-10-24 18:52:35,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 83 transitions, 194 flow [2024-10-24 18:52:35,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 83 transitions, 194 flow [2024-10-24 18:52:35,662 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 18:52:35,664 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;@25297f12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 18:52:35,664 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-10-24 18:52:35,665 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 18:52:35,665 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-24 18:52:35,665 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 18:52:35,666 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:35,666 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 18:52:35,666 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-10-24 18:52:35,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:35,666 INFO L85 PathProgramCache]: Analyzing trace with hash 435460, now seen corresponding path program 1 times [2024-10-24 18:52:35,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:35,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520463780] [2024-10-24 18:52:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:35,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:35,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:35,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520463780] [2024-10-24 18:52:35,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520463780] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:35,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:35,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 18:52:35,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244317082] [2024-10-24 18:52:35,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:35,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 18:52:35,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 18:52:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 18:52:35,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 83 [2024-10-24 18:52:35,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:35,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:35,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 83 [2024-10-24 18:52:35,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:40,614 INFO L124 PetriNetUnfolderBase]: 50073/77900 cut-off events. [2024-10-24 18:52:40,614 INFO L125 PetriNetUnfolderBase]: For 6570/6570 co-relation queries the response was YES. [2024-10-24 18:52:40,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144863 conditions, 77900 events. 50073/77900 cut-off events. For 6570/6570 co-relation queries the response was YES. Maximal size of possible extension queue 2504. Compared 629725 event pairs, 43302 based on Foata normal form. 13184/88884 useless extension candidates. Maximal degree in co-relation 14586. Up to 64116 conditions per place. [2024-10-24 18:52:41,261 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 39 selfloop transitions, 0 changer transitions 0/68 dead transitions. [2024-10-24 18:52:41,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 242 flow [2024-10-24 18:52:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 18:52:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-24 18:52:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2024-10-24 18:52:41,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6506024096385542 [2024-10-24 18:52:41,262 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 194 flow. Second operand 2 states and 108 transitions. [2024-10-24 18:52:41,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 242 flow [2024-10-24 18:52:41,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 236 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-24 18:52:41,267 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 158 flow [2024-10-24 18:52:41,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=158, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-10-24 18:52:41,268 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -6 predicate places. [2024-10-24 18:52:41,268 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 158 flow [2024-10-24 18:52:41,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:41,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:41,269 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 18:52:41,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-24 18:52:41,269 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-10-24 18:52:41,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:41,269 INFO L85 PathProgramCache]: Analyzing trace with hash 89915758, now seen corresponding path program 1 times [2024-10-24 18:52:41,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:41,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796172859] [2024-10-24 18:52:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:41,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:41,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:41,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796172859] [2024-10-24 18:52:41,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796172859] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:41,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:41,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 18:52:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153216704] [2024-10-24 18:52:41,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:41,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:52:41,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:41,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:52:41,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:52:41,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 83 [2024-10-24 18:52:41,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:41,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:41,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 83 [2024-10-24 18:52:41,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:46,441 INFO L124 PetriNetUnfolderBase]: 50073/77021 cut-off events. [2024-10-24 18:52:46,441 INFO L125 PetriNetUnfolderBase]: For 2846/2846 co-relation queries the response was YES. [2024-10-24 18:52:46,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142897 conditions, 77021 events. 50073/77021 cut-off events. For 2846/2846 co-relation queries the response was YES. Maximal size of possible extension queue 2448. Compared 609987 event pairs, 43302 based on Foata normal form. 0/75700 useless extension candidates. Maximal degree in co-relation 142890. Up to 64115 conditions per place. [2024-10-24 18:52:46,983 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 38 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2024-10-24 18:52:46,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 228 flow [2024-10-24 18:52:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:52:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:52:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2024-10-24 18:52:46,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4859437751004016 [2024-10-24 18:52:46,985 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 158 flow. Second operand 3 states and 121 transitions. [2024-10-24 18:52:46,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 228 flow [2024-10-24 18:52:46,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 64 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 18:52:46,990 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 152 flow [2024-10-24 18:52:46,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-10-24 18:52:46,992 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -8 predicate places. [2024-10-24 18:52:46,993 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 152 flow [2024-10-24 18:52:46,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:46,993 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:46,993 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 18:52:46,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-24 18:52:46,993 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-10-24 18:52:46,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:46,994 INFO L85 PathProgramCache]: Analyzing trace with hash 89915759, now seen corresponding path program 1 times [2024-10-24 18:52:46,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:46,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155959007] [2024-10-24 18:52:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:46,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:47,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:47,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155959007] [2024-10-24 18:52:47,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155959007] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:47,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:47,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:52:47,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389379751] [2024-10-24 18:52:47,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:47,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:52:47,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:52:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:52:47,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 83 [2024-10-24 18:52:47,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:47,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:47,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 83 [2024-10-24 18:52:47,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:56,613 INFO L124 PetriNetUnfolderBase]: 93886/142065 cut-off events. [2024-10-24 18:52:56,613 INFO L125 PetriNetUnfolderBase]: For 3685/3685 co-relation queries the response was YES. [2024-10-24 18:52:57,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265574 conditions, 142065 events. 93886/142065 cut-off events. For 3685/3685 co-relation queries the response was YES. Maximal size of possible extension queue 3591. Compared 1172785 event pairs, 20774 based on Foata normal form. 1755/141342 useless extension candidates. Maximal degree in co-relation 265566. Up to 48084 conditions per place. [2024-10-24 18:52:57,965 INFO L140 encePairwiseOnDemand]: 77/83 looper letters, 99 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2024-10-24 18:52:57,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 128 transitions, 518 flow [2024-10-24 18:52:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 18:52:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 18:52:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2024-10-24 18:52:57,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6048192771084338 [2024-10-24 18:52:57,967 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 152 flow. Second operand 5 states and 251 transitions. [2024-10-24 18:52:57,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 128 transitions, 518 flow [2024-10-24 18:52:57,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 128 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:52:57,971 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 178 flow [2024-10-24 18:52:57,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-10-24 18:52:57,972 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -3 predicate places. [2024-10-24 18:52:57,972 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 178 flow [2024-10-24 18:52:57,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:57,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:57,973 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:52:57,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-24 18:52:57,973 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-10-24 18:52:57,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:57,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1229035205, now seen corresponding path program 1 times [2024-10-24 18:52:57,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:57,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569991654] [2024-10-24 18:52:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:57,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 18:52:58,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569991654] [2024-10-24 18:52:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569991654] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:52:58,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:52:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:52:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295993322] [2024-10-24 18:52:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:52:58,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:52:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:52:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:52:58,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 83 [2024-10-24 18:52:58,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:58,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:58,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 83 [2024-10-24 18:52:58,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand