./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-10.i --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6ae2ee47 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 ../../../trunk/examples/svcomp/pthread/fib_safe-10.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 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 17:15:54,889 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 17:15:54,963 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-22 17:15:54,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 17:15:54,969 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 17:15:54,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 17:15:54,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 17:15:54,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 17:15:54,987 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 17:15:54,989 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 17:15:54,990 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 17:15:54,990 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 17:15:54,991 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 17:15:54,992 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 17:15:54,992 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 17:15:54,992 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 17:15:54,993 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 17:15:54,993 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 17:15:54,993 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-22 17:15:54,993 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-22 17:15:54,993 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-22 17:15:54,994 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 17:15:54,994 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 17:15:54,994 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-22 17:15:54,994 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 17:15:54,994 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 17:15:54,995 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 17:15:54,995 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 17:15:54,995 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 17:15:54,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 17:15:54,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:15:54,996 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 17:15:54,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 17:15:54,997 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 17:15:54,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 17:15:54,997 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 17:15:54,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 17:15:54,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 17:15:54,998 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 17:15:54,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 17:15:55,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 17:15:55,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 17:15:55,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 17:15:55,257 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 17:15:55,257 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 17:15:55,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-10.i [2023-11-22 17:15:56,318 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 17:15:56,510 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 17:15:56,510 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-10.i [2023-11-22 17:15:56,520 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ec450ec/06a7ad0e93d444eeaf7393ae5b791cc3/FLAG3e8289cb3 [2023-11-22 17:15:56,531 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ec450ec/06a7ad0e93d444eeaf7393ae5b791cc3 [2023-11-22 17:15:56,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 17:15:56,534 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 17:15:56,535 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 17:15:56,535 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 17:15:56,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 17:15:56,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261f0455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56, skipping insertion in model container [2023-11-22 17:15:56,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,576 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 17:15:56,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:15:56,825 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 17:15:56,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:15:56,877 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 17:15:56,877 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 17:15:56,883 INFO L206 MainTranslator]: Completed translation [2023-11-22 17:15:56,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56 WrapperNode [2023-11-22 17:15:56,884 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 17:15:56,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 17:15:56,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 17:15:56,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 17:15:56,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,903 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,989 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2023-11-22 17:15:56,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 17:15:56,990 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 17:15:57,000 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 17:15:57,000 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 17:15:57,008 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,014 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,034 INFO L189 HeapSplitter]: Split 4 memory accesses to 3 slices as follows [2, 1, 1] [2023-11-22 17:15:57,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,045 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,048 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 17:15:57,061 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 17:15:57,062 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 17:15:57,062 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 17:15:57,062 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:57,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:15:57,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:15:57,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 17:15:57,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 17:15:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-22 17:15:57,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-22 17:15:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-22 17:15:57,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-22 17:15:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 17:15:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 17:15:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 17:15:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-22 17:15:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 17:15:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 17:15:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 17:15:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 17:15:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 17:15:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 17:15:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-22 17:15:57,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 17:15:57,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 17:15:57,152 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-22 17:15:57,277 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 17:15:57,279 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 17:15:57,409 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 17:15:57,501 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 17:15:57,505 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 17:15:57,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:15:57 BoogieIcfgContainer [2023-11-22 17:15:57,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 17:15:57,507 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 17:15:57,507 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 17:15:57,510 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 17:15:57,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 05:15:56" (1/3) ... [2023-11-22 17:15:57,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea5277f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:15:57, skipping insertion in model container [2023-11-22 17:15:57,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (2/3) ... [2023-11-22 17:15:57,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea5277f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:15:57, skipping insertion in model container [2023-11-22 17:15:57,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:15:57" (3/3) ... [2023-11-22 17:15:57,512 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2023-11-22 17:15:57,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 17:15:57,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-22 17:15:57,526 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-22 17:15:57,552 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-22 17:15:57,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 88 flow [2023-11-22 17:15:57,607 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-11-22 17:15:57,627 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 17:15:57,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 38 events. 5/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2023-11-22 17:15:57,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 88 flow [2023-11-22 17:15:57,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 38 transitions, 82 flow [2023-11-22 17:15:57,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 17:15:57,660 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@950b18a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 17:15:57,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-22 17:15:57,671 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 17:15:57,671 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-22 17:15:57,671 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 17:15:57,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:57,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 17:15:57,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:15:57,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash 265637985, now seen corresponding path program 1 times [2023-11-22 17:15:57,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:57,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180658708] [2023-11-22 17:15:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:57,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:57,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180658708] [2023-11-22 17:15:57,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180658708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:57,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:57,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 17:15:57,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841801165] [2023-11-22 17:15:57,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:57,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:15:57,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:57,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:15:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:15:57,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-22 17:15:57,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-11-22 17:15:57,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:57,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-22 17:15:57,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:58,105 INFO L124 PetriNetUnfolderBase]: 133/268 cut-off events. [2023-11-22 17:15:58,105 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-22 17:15:58,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 268 events. 133/268 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 911 event pairs, 56 based on Foata normal form. 18/266 useless extension candidates. Maximal degree in co-relation 468. Up to 151 conditions per place. [2023-11-22 17:15:58,111 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 22 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-11-22 17:15:58,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 136 flow [2023-11-22 17:15:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:15:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:15:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-22 17:15:58,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2023-11-22 17:15:58,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-22 17:15:58,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-22 17:15:58,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:58,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-22 17:15:58,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-11-22 17:15:58,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,129 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 82 flow. Second operand 3 states and 79 transitions. [2023-11-22 17:15:58,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 136 flow [2023-11-22 17:15:58,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:58,132 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 74 flow [2023-11-22 17:15:58,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-22 17:15:58,138 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2023-11-22 17:15:58,138 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 74 flow [2023-11-22 17:15:58,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-11-22 17:15:58,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:58,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 17:15:58,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 17:15:58,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:15:58,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:58,140 INFO L85 PathProgramCache]: Analyzing trace with hash 265637986, now seen corresponding path program 1 times [2023-11-22 17:15:58,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:58,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339673382] [2023-11-22 17:15:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:58,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339673382] [2023-11-22 17:15:58,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339673382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:58,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:58,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 17:15:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222409396] [2023-11-22 17:15:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:58,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:15:58,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:58,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:15:58,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:15:58,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2023-11-22 17:15:58,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-22 17:15:58,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:58,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2023-11-22 17:15:58,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:58,412 INFO L124 PetriNetUnfolderBase]: 115/240 cut-off events. [2023-11-22 17:15:58,413 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-22 17:15:58,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 240 events. 115/240 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 810 event pairs, 56 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 423. Up to 150 conditions per place. [2023-11-22 17:15:58,417 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-11-22 17:15:58,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 130 flow [2023-11-22 17:15:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:15:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:15:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-22 17:15:58,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-22 17:15:58,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-22 17:15:58,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-22 17:15:58,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:58,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-22 17:15:58,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-11-22 17:15:58,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,427 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 74 flow. Second operand 3 states and 78 transitions. [2023-11-22 17:15:58,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 130 flow [2023-11-22 17:15:58,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:58,430 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 72 flow [2023-11-22 17:15:58,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-22 17:15:58,433 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-11-22 17:15:58,434 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 72 flow [2023-11-22 17:15:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-22 17:15:58,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:58,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:58,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 17:15:58,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:15:58,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2003281308, now seen corresponding path program 1 times [2023-11-22 17:15:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:58,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788929394] [2023-11-22 17:15:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:58,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:58,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788929394] [2023-11-22 17:15:58,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788929394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:58,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:58,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 17:15:58,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687450325] [2023-11-22 17:15:58,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:58,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:15:58,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:58,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:15:58,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:15:58,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-22 17:15:58,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-11-22 17:15:58,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:58,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-22 17:15:58,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:58,593 INFO L124 PetriNetUnfolderBase]: 118/242 cut-off events. [2023-11-22 17:15:58,593 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-22 17:15:58,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 242 events. 118/242 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 798 event pairs, 58 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 431. Up to 156 conditions per place. [2023-11-22 17:15:58,596 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-11-22 17:15:58,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 130 flow [2023-11-22 17:15:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:15:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:15:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-22 17:15:58,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-22 17:15:58,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-22 17:15:58,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-22 17:15:58,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:58,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-22 17:15:58,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-11-22 17:15:58,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,602 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 72 flow. Second operand 3 states and 76 transitions. [2023-11-22 17:15:58,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 130 flow [2023-11-22 17:15:58,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:58,603 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 70 flow [2023-11-22 17:15:58,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-22 17:15:58,605 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-22 17:15:58,605 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 70 flow [2023-11-22 17:15:58,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-11-22 17:15:58,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:58,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:58,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 17:15:58,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:15:58,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2003281307, now seen corresponding path program 1 times [2023-11-22 17:15:58,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:58,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408344481] [2023-11-22 17:15:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:58,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408344481] [2023-11-22 17:15:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408344481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:58,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:58,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 17:15:58,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302931432] [2023-11-22 17:15:58,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:58,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:15:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:15:58,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:15:58,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2023-11-22 17:15:58,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2023-11-22 17:15:58,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:58,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2023-11-22 17:15:58,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:58,752 INFO L124 PetriNetUnfolderBase]: 115/238 cut-off events. [2023-11-22 17:15:58,752 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-22 17:15:58,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 238 events. 115/238 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 795 event pairs, 56 based on Foata normal form. 3/223 useless extension candidates. Maximal degree in co-relation 421. Up to 150 conditions per place. [2023-11-22 17:15:58,755 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-22 17:15:58,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 126 flow [2023-11-22 17:15:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:15:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:15:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-22 17:15:58,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-22 17:15:58,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-22 17:15:58,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-22 17:15:58,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:58,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-22 17:15:58,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-11-22 17:15:58,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,761 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 70 flow. Second operand 3 states and 78 transitions. [2023-11-22 17:15:58,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 126 flow [2023-11-22 17:15:58,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:58,763 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2023-11-22 17:15:58,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-22 17:15:58,764 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2023-11-22 17:15:58,764 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2023-11-22 17:15:58,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2023-11-22 17:15:58,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:58,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:58,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 17:15:58,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:15:58,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:58,766 INFO L85 PathProgramCache]: Analyzing trace with hash 581954235, now seen corresponding path program 1 times [2023-11-22 17:15:58,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:58,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126596500] [2023-11-22 17:15:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:58,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:58,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:58,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126596500] [2023-11-22 17:15:58,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126596500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:58,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:58,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:15:58,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23679752] [2023-11-22 17:15:58,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:58,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:15:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:15:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:15:58,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-22 17:15:58,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2023-11-22 17:15:58,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:58,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-22 17:15:58,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:58,879 INFO L124 PetriNetUnfolderBase]: 133/265 cut-off events. [2023-11-22 17:15:58,880 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-22 17:15:58,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 265 events. 133/265 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 867 event pairs, 20 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 475. Up to 145 conditions per place. [2023-11-22 17:15:58,882 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-11-22 17:15:58,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 130 flow [2023-11-22 17:15:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:15:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:15:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-22 17:15:58,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2023-11-22 17:15:58,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-22 17:15:58,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-22 17:15:58,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:58,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-22 17:15:58,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-11-22 17:15:58,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-22 17:15:58,886 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 3 states and 82 transitions. [2023-11-22 17:15:58,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 130 flow [2023-11-22 17:15:58,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:58,888 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 76 flow [2023-11-22 17:15:58,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-22 17:15:58,890 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-22 17:15:58,891 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 76 flow [2023-11-22 17:15:58,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2023-11-22 17:15:58,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:58,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:58,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 17:15:58,891 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:15:58,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 81967731, now seen corresponding path program 1 times [2023-11-22 17:15:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:58,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562117935] [2023-11-22 17:15:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:58,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:58,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562117935] [2023-11-22 17:15:58,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562117935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:15:58,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029650380] [2023-11-22 17:15:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:58,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:15:58,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:15:58,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:15:58,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 17:15:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:59,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 17:15:59,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:15:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:59,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:15:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029650380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:15:59,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:15:59,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-22 17:15:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275169071] [2023-11-22 17:15:59,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:15:59,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 17:15:59,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:59,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 17:15:59,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 17:15:59,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-22 17:15:59,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2023-11-22 17:15:59,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:59,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-22 17:15:59,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:59,168 INFO L124 PetriNetUnfolderBase]: 187/346 cut-off events. [2023-11-22 17:15:59,168 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-22 17:15:59,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 346 events. 187/346 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1068 event pairs, 20 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 691. Up to 145 conditions per place. [2023-11-22 17:15:59,171 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 40 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-11-22 17:15:59,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 226 flow [2023-11-22 17:15:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 17:15:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 17:15:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2023-11-22 17:15:59,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2023-11-22 17:15:59,173 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 162 transitions. [2023-11-22 17:15:59,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 162 transitions. [2023-11-22 17:15:59,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:59,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 162 transitions. [2023-11-22 17:15:59,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-22 17:15:59,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 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) [2023-11-22 17:15:59,176 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 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) [2023-11-22 17:15:59,176 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 76 flow. Second operand 6 states and 162 transitions. [2023-11-22 17:15:59,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 226 flow [2023-11-22 17:15:59,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:15:59,178 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 110 flow [2023-11-22 17:15:59,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-11-22 17:15:59,180 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-22 17:15:59,180 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 110 flow [2023-11-22 17:15:59,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2023-11-22 17:15:59,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:59,181 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:59,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 17:15:59,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 17:15:59,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:15:59,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:59,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2134763333, now seen corresponding path program 2 times [2023-11-22 17:15:59,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:59,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942409485] [2023-11-22 17:15:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:59,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:59,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:59,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942409485] [2023-11-22 17:15:59,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942409485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:15:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625348295] [2023-11-22 17:15:59,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 17:15:59,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:15:59,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:15:59,471 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:15:59,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 17:15:59,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-22 17:15:59,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:15:59,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 17:15:59,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 17:16:00,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:16:00,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625348295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:16:00,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 17:16:00,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-11-22 17:16:00,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493336881] [2023-11-22 17:16:00,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:16:00,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:16:00,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:16:00,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-22 17:16:00,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2023-11-22 17:16:00,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2023-11-22 17:16:00,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:00,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2023-11-22 17:16:00,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:00,339 INFO L124 PetriNetUnfolderBase]: 190/340 cut-off events. [2023-11-22 17:16:00,341 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-22 17:16:00,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 340 events. 190/340 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 980 event pairs, 106 based on Foata normal form. 9/341 useless extension candidates. Maximal degree in co-relation 781. Up to 264 conditions per place. [2023-11-22 17:16:00,343 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 20 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2023-11-22 17:16:00,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 176 flow [2023-11-22 17:16:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:16:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-22 17:16:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2023-11-22 17:16:00,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-11-22 17:16:00,344 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 85 transitions. [2023-11-22 17:16:00,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 85 transitions. [2023-11-22 17:16:00,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:00,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 85 transitions. [2023-11-22 17:16:00,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2023-11-22 17:16:00,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 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) [2023-11-22 17:16:00,346 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 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) [2023-11-22 17:16:00,346 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 110 flow. Second operand 4 states and 85 transitions. [2023-11-22 17:16:00,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 176 flow [2023-11-22 17:16:00,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 162 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-22 17:16:00,350 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-11-22 17:16:00,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-11-22 17:16:00,351 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-11-22 17:16:00,351 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-11-22 17:16:00,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2023-11-22 17:16:00,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:00,352 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:00,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:00,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-22 17:16:00,563 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:16:00,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:00,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2134762226, now seen corresponding path program 1 times [2023-11-22 17:16:00,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:00,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339014662] [2023-11-22 17:16:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:00,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:00,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:00,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339014662] [2023-11-22 17:16:00,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339014662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:00,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154366338] [2023-11-22 17:16:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:00,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:00,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:00,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:00,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 17:16:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:00,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 17:16:00,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:00,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:00,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154366338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:00,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:00,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-22 17:16:00,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239947562] [2023-11-22 17:16:00,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:00,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 17:16:00,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:00,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 17:16:00,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-22 17:16:00,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-22 17:16:00,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 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) [2023-11-22 17:16:00,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:00,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-22 17:16:00,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:00,880 INFO L124 PetriNetUnfolderBase]: 277/472 cut-off events. [2023-11-22 17:16:00,880 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-22 17:16:00,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 472 events. 277/472 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1298 event pairs, 20 based on Foata normal form. 54/520 useless extension candidates. Maximal degree in co-relation 1105. Up to 118 conditions per place. [2023-11-22 17:16:00,883 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 75 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2023-11-22 17:16:00,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 98 transitions, 422 flow [2023-11-22 17:16:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 17:16:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-22 17:16:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2023-11-22 17:16:00,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-22 17:16:00,885 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 320 transitions. [2023-11-22 17:16:00,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 320 transitions. [2023-11-22 17:16:00,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:00,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 320 transitions. [2023-11-22 17:16:00,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 26.666666666666668) internal successors, (320), 12 states have internal predecessors, (320), 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) [2023-11-22 17:16:00,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 40.0) internal successors, (520), 13 states have internal predecessors, (520), 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) [2023-11-22 17:16:00,888 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 40.0) internal successors, (520), 13 states have internal predecessors, (520), 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) [2023-11-22 17:16:00,888 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 12 states and 320 transitions. [2023-11-22 17:16:00,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 98 transitions, 422 flow [2023-11-22 17:16:00,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 98 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:16:00,890 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 177 flow [2023-11-22 17:16:00,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=177, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2023-11-22 17:16:00,891 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2023-11-22 17:16:00,891 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 177 flow [2023-11-22 17:16:00,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 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) [2023-11-22 17:16:00,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:00,891 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:00,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:01,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:01,103 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:16:01,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:01,104 INFO L85 PathProgramCache]: Analyzing trace with hash -226475506, now seen corresponding path program 2 times [2023-11-22 17:16:01,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:01,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820713546] [2023-11-22 17:16:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:01,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:01,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:01,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820713546] [2023-11-22 17:16:01,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820713546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:01,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428051034] [2023-11-22 17:16:01,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 17:16:01,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:01,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:01,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:01,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 17:16:01,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 17:16:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:01,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 17:16:01,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:01,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:01,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428051034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:01,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:01,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-22 17:16:01,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359077521] [2023-11-22 17:16:01,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:01,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 17:16:01,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 17:16:01,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-22 17:16:01,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-22 17:16:01,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 177 flow. Second operand has 25 states, 25 states have (on average 20.32) internal successors, (508), 25 states have internal predecessors, (508), 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) [2023-11-22 17:16:01,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:01,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-22 17:16:01,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:01,831 INFO L124 PetriNetUnfolderBase]: 493/796 cut-off events. [2023-11-22 17:16:01,831 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2023-11-22 17:16:01,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2303 conditions, 796 events. 493/796 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2099 event pairs, 20 based on Foata normal form. 108/898 useless extension candidates. Maximal degree in co-relation 2284. Up to 190 conditions per place. [2023-11-22 17:16:01,836 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 147 selfloop transitions, 23 changer transitions 0/182 dead transitions. [2023-11-22 17:16:01,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 182 transitions, 877 flow [2023-11-22 17:16:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 17:16:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-22 17:16:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 638 transitions. [2023-11-22 17:16:01,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645833333333333 [2023-11-22 17:16:01,838 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 638 transitions. [2023-11-22 17:16:01,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 638 transitions. [2023-11-22 17:16:01,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:01,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 638 transitions. [2023-11-22 17:16:01,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 26.583333333333332) internal successors, (638), 24 states have internal predecessors, (638), 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) [2023-11-22 17:16:01,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 40.0) internal successors, (1000), 25 states have internal predecessors, (1000), 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) [2023-11-22 17:16:01,841 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 40.0) internal successors, (1000), 25 states have internal predecessors, (1000), 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) [2023-11-22 17:16:01,841 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 177 flow. Second operand 24 states and 638 transitions. [2023-11-22 17:16:01,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 182 transitions, 877 flow [2023-11-22 17:16:01,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 182 transitions, 805 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-22 17:16:01,846 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 297 flow [2023-11-22 17:16:01,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=297, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2023-11-22 17:16:01,847 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2023-11-22 17:16:01,847 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 297 flow [2023-11-22 17:16:01,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 20.32) internal successors, (508), 25 states have internal predecessors, (508), 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) [2023-11-22 17:16:01,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:01,847 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:01,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:02,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:02,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:16:02,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:02,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1728230386, now seen corresponding path program 3 times [2023-11-22 17:16:02,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:02,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997290695] [2023-11-22 17:16:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:02,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:03,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997290695] [2023-11-22 17:16:03,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997290695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825230871] [2023-11-22 17:16:03,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 17:16:03,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:03,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:03,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:03,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 17:16:03,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-22 17:16:03,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:03,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-22 17:16:03,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:04,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:05,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825230871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:05,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:05,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 83 [2023-11-22 17:16:05,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669295592] [2023-11-22 17:16:05,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:05,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-22 17:16:05,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:05,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-22 17:16:05,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=5959, Unknown=0, NotChecked=0, Total=6972 [2023-11-22 17:16:06,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2023-11-22 17:16:06,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 297 flow. Second operand has 84 states, 84 states have (on average 14.202380952380953) internal successors, (1193), 84 states have internal predecessors, (1193), 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) [2023-11-22 17:16:06,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:06,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2023-11-22 17:16:06,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:43,423 INFO L124 PetriNetUnfolderBase]: 31774/51751 cut-off events. [2023-11-22 17:16:43,423 INFO L125 PetriNetUnfolderBase]: For 171807/171807 co-relation queries the response was YES. [2023-11-22 17:16:43,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148219 conditions, 51751 events. 31774/51751 cut-off events. For 171807/171807 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 350707 event pairs, 70 based on Foata normal form. 0/51255 useless extension candidates. Maximal degree in co-relation 148188. Up to 7735 conditions per place. [2023-11-22 17:16:43,740 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 880 selfloop transitions, 1265 changer transitions 1053/3204 dead transitions. [2023-11-22 17:16:43,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 3204 transitions, 22126 flow [2023-11-22 17:16:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2023-11-22 17:16:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2023-11-22 17:16:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 5668 transitions. [2023-11-22 17:16:43,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347169811320754 [2023-11-22 17:16:43,762 INFO L72 ComplementDD]: Start complementDD. Operand 265 states and 5668 transitions. [2023-11-22 17:16:43,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 265 states and 5668 transitions. [2023-11-22 17:16:43,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:43,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 265 states and 5668 transitions. [2023-11-22 17:16:43,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 266 states, 265 states have (on average 21.38867924528302) internal successors, (5668), 265 states have internal predecessors, (5668), 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) [2023-11-22 17:16:43,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 266 states, 266 states have (on average 40.0) internal successors, (10640), 266 states have internal predecessors, (10640), 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) [2023-11-22 17:16:43,799 INFO L81 ComplementDD]: Finished complementDD. Result has 266 states, 266 states have (on average 40.0) internal successors, (10640), 266 states have internal predecessors, (10640), 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) [2023-11-22 17:16:43,800 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 297 flow. Second operand 265 states and 5668 transitions. [2023-11-22 17:16:43,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 3204 transitions, 22126 flow [2023-11-22 17:16:44,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 3204 transitions, 17448 flow, removed 1850 selfloop flow, removed 11 redundant places. [2023-11-22 17:16:44,211 INFO L231 Difference]: Finished difference. Result has 442 places, 1401 transitions, 8467 flow [2023-11-22 17:16:44,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=265, PETRI_FLOW=8467, PETRI_PLACES=442, PETRI_TRANSITIONS=1401} [2023-11-22 17:16:44,212 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 402 predicate places. [2023-11-22 17:16:44,212 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1401 transitions, 8467 flow [2023-11-22 17:16:44,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 14.202380952380953) internal successors, (1193), 84 states have internal predecessors, (1193), 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) [2023-11-22 17:16:44,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:44,213 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:44,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-22 17:16:44,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-22 17:16:44,425 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 17:16:44,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:44,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1600802624, now seen corresponding path program 1 times [2023-11-22 17:16:44,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:44,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370629531] [2023-11-22 17:16:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:44,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:45,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:45,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370629531] [2023-11-22 17:16:45,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370629531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:45,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145825957] [2023-11-22 17:16:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:45,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:45,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:45,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 17:16:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:45,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-22 17:16:45,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:46,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:48,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145825957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:48,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:48,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 90 [2023-11-22 17:16:48,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619632394] [2023-11-22 17:16:48,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:48,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-22 17:16:48,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:48,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-22 17:16:48,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1073, Invalid=7117, Unknown=0, NotChecked=0, Total=8190 [2023-11-22 17:16:48,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2023-11-22 17:16:48,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1401 transitions, 8467 flow. Second operand has 91 states, 91 states have (on average 14.241758241758241) internal successors, (1296), 91 states have internal predecessors, (1296), 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) [2023-11-22 17:16:48,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:48,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2023-11-22 17:16:48,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand