./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:11:03,889 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:11:03,979 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:11:03,983 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:11:03,984 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:11:04,016 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:11:04,017 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:11:04,018 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:11:04,019 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:11:04,019 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:11:04,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:11:04,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:11:04,021 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:11:04,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:11:04,023 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:11:04,023 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:11:04,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:11:04,027 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:11:04,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:11:04,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:11:04,028 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:11:04,029 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:11:04,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:11:04,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:11:04,029 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:11:04,030 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:11:04,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:11:04,030 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:11:04,030 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:11:04,031 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:11:04,031 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:11:04,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:11:04,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:11:04,032 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:11:04,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:11:04,035 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:11:04,035 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:11:04,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:11:04,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:11:04,036 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:11:04,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:11:04,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:11:04,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 [2024-11-10 10:11:04,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:11:04,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:11:04,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:11:04,357 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:11:04,357 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:11:04,359 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-11-10 10:11:05,987 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:11:06,259 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:11:06,260 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-11-10 10:11:06,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58661353d/057f63ff8e8a456aac8deb0b858d54e7/FLAG3f9113774 [2024-11-10 10:11:06,291 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58661353d/057f63ff8e8a456aac8deb0b858d54e7 [2024-11-10 10:11:06,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:11:06,295 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:11:06,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:11:06,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:11:06,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:11:06,305 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8bdce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06, skipping insertion in model container [2024-11-10 10:11:06,306 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,355 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:11:06,702 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2024-11-10 10:11:06,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:11:06,738 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:11:06,784 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2024-11-10 10:11:06,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:11:06,829 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:11:06,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06 WrapperNode [2024-11-10 10:11:06,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:11:06,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:11:06,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:11:06,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:11:06,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,854 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,879 INFO L138 Inliner]: procedures = 164, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2024-11-10 10:11:06,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:11:06,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:11:06,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:11:06,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:11:06,893 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,898 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,911 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2024-11-10 10:11:06,911 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,912 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,916 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,918 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,919 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,921 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:11:06,922 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:11:06,923 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:11:06,923 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:11:06,924 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (1/1) ... [2024-11-10 10:11:06,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:11:06,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:11:06,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 10:11:06,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 10:11:07,019 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-10 10:11:07,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-10 10:11:07,020 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 10:11:07,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:11:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:11:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:11:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 10:11:07,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:11:07,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:11:07,026 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:11:07,172 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:11:07,174 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:11:07,386 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:11:07,386 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:11:07,524 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:11:07,524 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:11:07,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:11:07 BoogieIcfgContainer [2024-11-10 10:11:07,528 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:11:07,531 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:11:07,531 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:11:07,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:11:07,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:11:06" (1/3) ... [2024-11-10 10:11:07,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf30a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:11:07, skipping insertion in model container [2024-11-10 10:11:07,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:11:06" (2/3) ... [2024-11-10 10:11:07,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf30a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:11:07, skipping insertion in model container [2024-11-10 10:11:07,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:11:07" (3/3) ... [2024-11-10 10:11:07,543 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs-pthread.i [2024-11-10 10:11:07,563 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:11:07,564 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-10 10:11:07,564 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:11:07,611 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:11:07,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 27 transitions, 58 flow [2024-11-10 10:11:07,690 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2024-11-10 10:11:07,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:11:07,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 41 events. 5/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 100 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2024-11-10 10:11:07,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 27 transitions, 58 flow [2024-11-10 10:11:07,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 27 transitions, 58 flow [2024-11-10 10:11:07,717 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:11:07,727 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@67c09930, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:11:07,728 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-10 10:11:07,738 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:11:07,741 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-10 10:11:07,741 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:11:07,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:07,742 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:11:07,743 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:11:07,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash 292361437, now seen corresponding path program 1 times [2024-11-10 10:11:07,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:07,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633355058] [2024-11-10 10:11:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:07,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:11:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:11:07,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:11:07,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633355058] [2024-11-10 10:11:07,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633355058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:11:07,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:11:07,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:11:07,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95753522] [2024-11-10 10:11:07,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:11:07,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:11:08,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:11:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:11:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:11:08,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2024-11-10 10:11:08,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:08,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:11:08,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2024-11-10 10:11:08,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:11:08,153 INFO L124 PetriNetUnfolderBase]: 45/154 cut-off events. [2024-11-10 10:11:08,153 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:11:08,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 154 events. 45/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 655 event pairs, 45 based on Foata normal form. 17/161 useless extension candidates. Maximal degree in co-relation 242. Up to 116 conditions per place. [2024-11-10 10:11:08,159 INFO L140 encePairwiseOnDemand]: 24/27 looper letters, 16 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2024-11-10 10:11:08,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 84 flow [2024-11-10 10:11:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:11:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:11:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-11-10 10:11:08,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-11-10 10:11:08,176 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 58 flow. Second operand 2 states and 35 transitions. [2024-11-10 10:11:08,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 84 flow [2024-11-10 10:11:08,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 84 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:11:08,182 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 52 flow [2024-11-10 10:11:08,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-11-10 10:11:08,190 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2024-11-10 10:11:08,191 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 52 flow [2024-11-10 10:11:08,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:08,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:08,192 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 10:11:08,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:11:08,192 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:11:08,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash 306228351, now seen corresponding path program 1 times [2024-11-10 10:11:08,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:08,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616401331] [2024-11-10 10:11:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:08,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:11:08,225 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:11:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:11:08,268 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:11:08,269 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:11:08,272 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-10 10:11:08,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-10 10:11:08,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-10 10:11:08,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-10 10:11:08,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:11:08,277 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-10 10:11:08,282 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:11:08,283 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 10:11:08,305 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:11:08,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 86 flow [2024-11-10 10:11:08,330 INFO L124 PetriNetUnfolderBase]: 8/66 cut-off events. [2024-11-10 10:11:08,330 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:11:08,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 66 events. 8/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 211 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 43. Up to 6 conditions per place. [2024-11-10 10:11:08,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 86 flow [2024-11-10 10:11:08,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 86 flow [2024-11-10 10:11:08,334 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:11:08,336 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@67c09930, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:11:08,336 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-10 10:11:08,340 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:11:08,341 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-10 10:11:08,341 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:11:08,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:08,341 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:11:08,341 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:11:08,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash 781934275, now seen corresponding path program 1 times [2024-11-10 10:11:08,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:08,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308676187] [2024-11-10 10:11:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:08,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:11:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:11:08,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:11:08,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308676187] [2024-11-10 10:11:08,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308676187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:11:08,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:11:08,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:11:08,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481909522] [2024-11-10 10:11:08,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:11:08,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:11:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:11:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:11:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:11:08,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 38 [2024-11-10 10:11:08,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:08,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:11:08,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 38 [2024-11-10 10:11:08,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:11:08,640 INFO L124 PetriNetUnfolderBase]: 615/1294 cut-off events. [2024-11-10 10:11:08,640 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-10 10:11:08,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 1294 events. 615/1294 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8169 event pairs, 615 based on Foata normal form. 173/1388 useless extension candidates. Maximal degree in co-relation 1693. Up to 1046 conditions per place. [2024-11-10 10:11:08,656 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 22 selfloop transitions, 0 changer transitions 0/34 dead transitions. [2024-11-10 10:11:08,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 122 flow [2024-11-10 10:11:08,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:11:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:11:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-10 10:11:08,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-10 10:11:08,661 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 86 flow. Second operand 2 states and 50 transitions. [2024-11-10 10:11:08,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 122 flow [2024-11-10 10:11:08,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:11:08,663 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 78 flow [2024-11-10 10:11:08,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-11-10 10:11:08,667 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-11-10 10:11:08,668 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 78 flow [2024-11-10 10:11:08,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:08,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:08,668 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:11:08,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:11:08,669 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:11:08,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1144682752, now seen corresponding path program 1 times [2024-11-10 10:11:08,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:08,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780769212] [2024-11-10 10:11:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:08,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:11:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:11:08,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:11:08,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780769212] [2024-11-10 10:11:08,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780769212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:11:08,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:11:08,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:11:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026953335] [2024-11-10 10:11:08,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:11:08,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:11:08,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:11:08,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:11:08,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:11:08,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:11:08,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:08,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:11:08,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:11:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:11:09,216 INFO L124 PetriNetUnfolderBase]: 967/1933 cut-off events. [2024-11-10 10:11:09,219 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-10 10:11:09,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1933 events. 967/1933 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12610 event pairs, 612 based on Foata normal form. 191/2066 useless extension candidates. Maximal degree in co-relation 3590. Up to 1239 conditions per place. [2024-11-10 10:11:09,232 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 39 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2024-11-10 10:11:09,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 213 flow [2024-11-10 10:11:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:11:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:11:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-11-10 10:11:09,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-10 10:11:09,235 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 78 flow. Second operand 3 states and 75 transitions. [2024-11-10 10:11:09,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 213 flow [2024-11-10 10:11:09,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:11:09,239 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 132 flow [2024-11-10 10:11:09,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-11-10 10:11:09,242 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-11-10 10:11:09,242 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 132 flow [2024-11-10 10:11:09,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:09,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:09,243 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2024-11-10 10:11:09,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:11:09,243 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:11:09,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:09,244 INFO L85 PathProgramCache]: Analyzing trace with hash -220609475, now seen corresponding path program 1 times [2024-11-10 10:11:09,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:09,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861731735] [2024-11-10 10:11:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:09,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:11:09,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:11:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:11:09,294 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:11:09,298 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:11:09,298 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-10 10:11:09,299 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-10 10:11:09,299 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-10 10:11:09,299 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-10 10:11:09,299 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-10 10:11:09,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 10:11:09,300 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-10 10:11:09,300 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:11:09,301 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 10:11:09,322 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:11:09,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 116 flow [2024-11-10 10:11:09,334 INFO L124 PetriNetUnfolderBase]: 11/91 cut-off events. [2024-11-10 10:11:09,335 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-10 10:11:09,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 11/91 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 327 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 72. Up to 8 conditions per place. [2024-11-10 10:11:09,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 116 flow [2024-11-10 10:11:09,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 49 transitions, 116 flow [2024-11-10 10:11:09,341 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:11:09,342 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@67c09930, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:11:09,342 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-10 10:11:09,345 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:11:09,345 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-10 10:11:09,345 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:11:09,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:09,345 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:11:09,345 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-10 10:11:09,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1525436268, now seen corresponding path program 1 times [2024-11-10 10:11:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:09,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424418738] [2024-11-10 10:11:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:11:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:11:09,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:11:09,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424418738] [2024-11-10 10:11:09,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424418738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:11:09,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:11:09,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:11:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319860233] [2024-11-10 10:11:09,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:11:09,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:11:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:11:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:11:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:11:09,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-10 10:11:09,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:09,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:11:09,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-10 10:11:09,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:11:10,389 INFO L124 PetriNetUnfolderBase]: 5835/9940 cut-off events. [2024-11-10 10:11:10,390 INFO L125 PetriNetUnfolderBase]: For 278/278 co-relation queries the response was YES. [2024-11-10 10:11:10,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18534 conditions, 9940 events. 5835/9940 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 73960 event pairs, 5835 based on Foata normal form. 1469/10931 useless extension candidates. Maximal degree in co-relation 3943. Up to 8426 conditions per place. [2024-11-10 10:11:10,477 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 28 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2024-11-10 10:11:10,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 162 flow [2024-11-10 10:11:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:11:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:11:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 65 transitions. [2024-11-10 10:11:10,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-11-10 10:11:10,481 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 116 flow. Second operand 2 states and 65 transitions. [2024-11-10 10:11:10,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 162 flow [2024-11-10 10:11:10,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 44 transitions, 160 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-10 10:11:10,483 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 104 flow [2024-11-10 10:11:10,483 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-11-10 10:11:10,484 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-11-10 10:11:10,484 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 104 flow [2024-11-10 10:11:10,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:10,485 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:10,485 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:11:10,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 10:11:10,486 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-10 10:11:10,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:10,486 INFO L85 PathProgramCache]: Analyzing trace with hash 341274496, now seen corresponding path program 1 times [2024-11-10 10:11:10,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:10,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074869507] [2024-11-10 10:11:10,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:10,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:11:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:11:10,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:11:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074869507] [2024-11-10 10:11:10,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074869507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:11:10,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:11:10,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:11:10,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160285554] [2024-11-10 10:11:10,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:11:10,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:11:10,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:11:10,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:11:10,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:11:10,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-11-10 10:11:10,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:10,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:11:10,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-11-10 10:11:10,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:11:12,340 INFO L124 PetriNetUnfolderBase]: 12179/20345 cut-off events. [2024-11-10 10:11:12,341 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2024-11-10 10:11:12,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38104 conditions, 20345 events. 12179/20345 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 162685 event pairs, 7347 based on Foata normal form. 1919/21798 useless extension candidates. Maximal degree in co-relation 38098. Up to 12688 conditions per place. [2024-11-10 10:11:12,591 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 50 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2024-11-10 10:11:12,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 282 flow [2024-11-10 10:11:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:11:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:11:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-11-10 10:11:12,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-10 10:11:12,594 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 104 flow. Second operand 3 states and 98 transitions. [2024-11-10 10:11:12,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 282 flow [2024-11-10 10:11:12,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 282 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:11:12,599 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 176 flow [2024-11-10 10:11:12,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-11-10 10:11:12,600 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2024-11-10 10:11:12,601 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 176 flow [2024-11-10 10:11:12,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:12,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:12,605 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2024-11-10 10:11:12,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 10:11:12,606 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-10 10:11:12,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2093624715, now seen corresponding path program 1 times [2024-11-10 10:11:12,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:12,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697741675] [2024-11-10 10:11:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:12,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:11:12,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:11:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:11:12,643 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:11:12,645 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:11:12,645 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-10 10:11:12,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-10 10:11:12,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-10 10:11:12,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-10 10:11:12,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-10 10:11:12,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-10 10:11:12,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 10:11:12,647 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-10 10:11:12,650 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:11:12,650 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-10 10:11:12,669 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:11:12,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 60 transitions, 148 flow [2024-11-10 10:11:12,681 INFO L124 PetriNetUnfolderBase]: 14/116 cut-off events. [2024-11-10 10:11:12,681 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-10 10:11:12,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 116 events. 14/116 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 437 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 102. Up to 10 conditions per place. [2024-11-10 10:11:12,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 60 transitions, 148 flow [2024-11-10 10:11:12,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 148 flow [2024-11-10 10:11:12,684 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:11:12,685 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@67c09930, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:11:12,685 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 10:11:12,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:11:12,687 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-10 10:11:12,687 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:11:12,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:12,688 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:11:12,688 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:11:12,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:12,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1960184400, now seen corresponding path program 1 times [2024-11-10 10:11:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:12,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744995914] [2024-11-10 10:11:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:12,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:11:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:11:12,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:11:12,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744995914] [2024-11-10 10:11:12,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744995914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:11:12,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:11:12,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:11:12,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877904849] [2024-11-10 10:11:12,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:11:12,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:11:12,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:11:12,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:11:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:11:12,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-11-10 10:11:12,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:12,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:11:12,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-11-10 10:11:12,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:11:18,359 INFO L124 PetriNetUnfolderBase]: 47955/72740 cut-off events. [2024-11-10 10:11:18,360 INFO L125 PetriNetUnfolderBase]: For 3018/3018 co-relation queries the response was YES. [2024-11-10 10:11:18,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137495 conditions, 72740 events. 47955/72740 cut-off events. For 3018/3018 co-relation queries the response was YES. Maximal size of possible extension queue 3015. Compared 596542 event pairs, 47955 based on Foata normal form. 11405/81337 useless extension candidates. Maximal degree in co-relation 18603. Up to 63506 conditions per place. [2024-11-10 10:11:18,977 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 34 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2024-11-10 10:11:18,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 204 flow [2024-11-10 10:11:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:11:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:11:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 80 transitions. [2024-11-10 10:11:18,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-10 10:11:18,984 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 148 flow. Second operand 2 states and 80 transitions. [2024-11-10 10:11:18,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 204 flow [2024-11-10 10:11:18,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 198 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-10 10:11:18,996 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 130 flow [2024-11-10 10:11:18,996 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-11-10 10:11:18,997 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2024-11-10 10:11:18,997 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 130 flow [2024-11-10 10:11:18,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:18,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:18,998 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:11:18,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 10:11:18,999 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:11:18,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:19,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1021332864, now seen corresponding path program 1 times [2024-11-10 10:11:19,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:19,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327840602] [2024-11-10 10:11:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:19,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:11:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:11:19,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:11:19,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327840602] [2024-11-10 10:11:19,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327840602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:11:19,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:11:19,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:11:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047222011] [2024-11-10 10:11:19,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:11:19,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:11:19,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:11:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:11:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:11:19,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2024-11-10 10:11:19,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:19,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:11:19,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2024-11-10 10:11:19,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:11:31,681 INFO L124 PetriNetUnfolderBase]: 129035/194871 cut-off events. [2024-11-10 10:11:31,681 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2024-11-10 10:11:32,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367575 conditions, 194871 events. 129035/194871 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 7300. Compared 1743101 event pairs, 75131 based on Foata normal form. 17945/209104 useless extension candidates. Maximal degree in co-relation 367568. Up to 118406 conditions per place. [2024-11-10 10:11:33,058 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 61 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-11-10 10:11:33,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 351 flow [2024-11-10 10:11:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:11:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:11:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2024-11-10 10:11:33,059 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-11-10 10:11:33,059 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 130 flow. Second operand 3 states and 121 transitions. [2024-11-10 10:11:33,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 351 flow [2024-11-10 10:11:33,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 86 transitions, 351 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:11:33,067 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 220 flow [2024-11-10 10:11:33,068 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-11-10 10:11:33,068 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2024-11-10 10:11:33,069 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 220 flow [2024-11-10 10:11:33,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:11:33,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:33,069 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2024-11-10 10:11:33,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 10:11:33,070 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:11:33,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1565606576, now seen corresponding path program 1 times [2024-11-10 10:11:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:33,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427762975] [2024-11-10 10:11:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:11:33,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:11:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:11:33,091 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:11:33,092 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:11:33,092 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 10:11:33,092 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-11-10 10:11:33,092 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-10 10:11:33,093 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-10 10:11:33,093 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-10 10:11:33,093 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-10 10:11:33,093 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-10 10:11:33,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 10:11:33,094 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-10 10:11:33,094 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:11:33,094 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-10 10:11:33,115 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:11:33,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 71 transitions, 182 flow [2024-11-10 10:11:33,129 INFO L124 PetriNetUnfolderBase]: 17/141 cut-off events. [2024-11-10 10:11:33,130 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-10 10:11:33,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 141 events. 17/141 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 546 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 133. Up to 12 conditions per place. [2024-11-10 10:11:33,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 71 transitions, 182 flow [2024-11-10 10:11:33,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 71 transitions, 182 flow [2024-11-10 10:11:33,134 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:11:33,134 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@67c09930, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:11:33,134 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-10 10:11:33,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:11:33,137 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-10 10:11:33,137 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:11:33,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:11:33,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:11:33,138 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-10 10:11:33,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:11:33,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1646105609, now seen corresponding path program 1 times [2024-11-10 10:11:33,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:11:33,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922690480] [2024-11-10 10:11:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:11:33,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:11:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:11:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:11:33,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:11:33,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922690480] [2024-11-10 10:11:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922690480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:11:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:11:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:11:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474379631] [2024-11-10 10:11:33,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:11:33,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:11:33,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:11:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:11:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:11:33,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 71 [2024-11-10 10:11:33,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 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) [2024-11-10 10:11:33,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:11:33,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 71 [2024-11-10 10:11:33,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand