./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/14_spin2003.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/14_spin2003.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 83bca07672f78100877a79a1440d2a8107bad3ebb200d176bee629abfa2ef706 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:09:19,646 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:09:19,721 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:09:19,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:09:19,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:09:19,755 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:09:19,756 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:09:19,756 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:09:19,757 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:09:19,757 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:09:19,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:09:19,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:09:19,760 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:09:19,761 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:09:19,762 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:09:19,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:09:19,762 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:09:19,763 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:09:19,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:09:19,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:09:19,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:09:19,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:09:19,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:09:19,768 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:09:19,768 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:09:19,768 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:09:19,769 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:09:19,769 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:09:19,769 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:09:19,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:09:19,770 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:09:19,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:09:19,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:09:19,771 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:09:19,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:09:19,773 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:09:19,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:09:19,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:09:19,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:09:19,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:09:19,776 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:09:19,776 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:09:19,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83bca07672f78100877a79a1440d2a8107bad3ebb200d176bee629abfa2ef706 [2024-11-10 10:09:20,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:09:20,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:09:20,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:09:20,138 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:09:20,138 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:09:20,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/14_spin2003.i [2024-11-10 10:09:21,605 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:09:21,888 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:09:21,888 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i [2024-11-10 10:09:21,901 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114882e9f/02f1307bcbde4a37964497ab98eade93/FLAG4b5680dfd [2024-11-10 10:09:21,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114882e9f/02f1307bcbde4a37964497ab98eade93 [2024-11-10 10:09:21,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:09:21,918 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:09:21,919 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:09:21,919 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:09:21,926 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:09:21,927 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:09:21" (1/1) ... [2024-11-10 10:09:21,928 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364cab7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:21, skipping insertion in model container [2024-11-10 10:09:21,928 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:09:21" (1/1) ... [2024-11-10 10:09:21,972 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:09:22,353 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/14_spin2003.i[30419,30432] [2024-11-10 10:09:22,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:09:22,381 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:09:22,427 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/14_spin2003.i[30419,30432] [2024-11-10 10:09:22,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:09:22,467 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:09:22,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22 WrapperNode [2024-11-10 10:09:22,468 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:09:22,469 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:09:22,470 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:09:22,470 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:09:22,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,491 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,511 INFO L138 Inliner]: procedures = 161, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2024-11-10 10:09:22,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:09:22,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:09:22,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:09:22,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:09:22,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,526 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,544 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 10:09:22,544 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,545 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,551 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:09:22,557 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:09:22,557 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:09:22,558 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:09:22,558 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (1/1) ... [2024-11-10 10:09:22,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:09:22,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:09:22,605 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 10:09:22,613 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 10:09:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-10 10:09:22,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-10 10:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 10:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 10:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:09:22,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:09:22,661 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 10:09:22,790 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:09:22,795 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:09:22,939 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:09:22,943 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:09:23,065 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:09:23,065 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:09:23,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:09:23 BoogieIcfgContainer [2024-11-10 10:09:23,066 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:09:23,068 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:09:23,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:09:23,074 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:09:23,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:09:21" (1/3) ... [2024-11-10 10:09:23,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ed526f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:09:23, skipping insertion in model container [2024-11-10 10:09:23,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:09:22" (2/3) ... [2024-11-10 10:09:23,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ed526f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:09:23, skipping insertion in model container [2024-11-10 10:09:23,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:09:23" (3/3) ... [2024-11-10 10:09:23,077 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2024-11-10 10:09:23,096 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:09:23,096 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:09:23,097 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:09:23,140 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:09:23,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 18 places, 17 transitions, 38 flow [2024-11-10 10:09:23,202 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-11-10 10:09:23,203 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:09:23,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 4 conditions per place. [2024-11-10 10:09:23,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 17 transitions, 38 flow [2024-11-10 10:09:23,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 18 places, 17 transitions, 38 flow [2024-11-10 10:09:23,226 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:09:23,236 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;@266449e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:09:23,237 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:09:23,248 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:09:23,249 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2024-11-10 10:09:23,249 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:09:23,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:23,250 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 10:09:23,250 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-10 10:09:23,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash 611963788, now seen corresponding path program 1 times [2024-11-10 10:09:23,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:23,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984520926] [2024-11-10 10:09:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:23,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:23,409 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:09:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:23,456 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:09:23,458 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:09:23,458 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-10 10:09:23,460 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-10 10:09:23,460 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-10 10:09:23,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:09:23,461 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-10 10:09:23,464 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:09:23,464 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 10:09:23,477 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:09:23,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 27 transitions, 64 flow [2024-11-10 10:09:23,488 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2024-11-10 10:09:23,488 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:09:23,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 37 events. 5/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 6 conditions per place. [2024-11-10 10:09:23,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 27 transitions, 64 flow [2024-11-10 10:09:23,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 27 transitions, 64 flow [2024-11-10 10:09:23,491 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:09:23,492 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;@266449e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:09:23,492 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-10 10:09:23,499 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:09:23,499 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-10 10:09:23,499 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:09:23,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:23,499 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:09:23,500 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-10 10:09:23,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:23,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1498044988, now seen corresponding path program 1 times [2024-11-10 10:09:23,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:23,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481396579] [2024-11-10 10:09:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:23,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:09:23,669 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 10:09:23,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:09:23,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481396579] [2024-11-10 10:09:23,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481396579] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:09:23,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:09:23,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:09:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569781218] [2024-11-10 10:09:23,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:09:23,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:09:23,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:09:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:09:23,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:09:23,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2024-11-10 10:09:23,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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 10:09:23,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:09:23,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2024-11-10 10:09:23,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:09:23,839 INFO L124 PetriNetUnfolderBase]: 64/148 cut-off events. [2024-11-10 10:09:23,840 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-10 10:09:23,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 148 events. 64/148 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 560 event pairs, 64 based on Foata normal form. 53/198 useless extension candidates. Maximal degree in co-relation 175. Up to 126 conditions per place. [2024-11-10 10:09:23,845 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 11 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2024-11-10 10:09:23,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 70 flow [2024-11-10 10:09:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:09:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:09:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-11-10 10:09:23,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-11-10 10:09:23,861 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 64 flow. Second operand 3 states and 40 transitions. [2024-11-10 10:09:23,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 70 flow [2024-11-10 10:09:23,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 18 transitions, 70 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:09:23,867 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 48 flow [2024-11-10 10:09:23,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2024-11-10 10:09:23,875 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2024-11-10 10:09:23,876 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 48 flow [2024-11-10 10:09:23,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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 10:09:23,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:23,876 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2024-11-10 10:09:23,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:09:23,877 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-10 10:09:23,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:23,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1194720313, now seen corresponding path program 1 times [2024-11-10 10:09:23,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:23,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592891731] [2024-11-10 10:09:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:23,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:23,905 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:09:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:23,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:09:23,924 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:09:23,929 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-10 10:09:23,930 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-10 10:09:23,930 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-10 10:09:23,930 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-10 10:09:23,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:09:23,930 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-10 10:09:23,931 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:09:23,931 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 10:09:23,954 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:09:23,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 37 transitions, 92 flow [2024-11-10 10:09:23,973 INFO L124 PetriNetUnfolderBase]: 7/52 cut-off events. [2024-11-10 10:09:23,974 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-10 10:09:23,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 7/52 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 43. Up to 8 conditions per place. [2024-11-10 10:09:23,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 37 transitions, 92 flow [2024-11-10 10:09:23,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 92 flow [2024-11-10 10:09:23,977 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:09:23,978 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;@266449e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:09:23,978 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-10 10:09:23,985 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:09:23,985 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-10 10:09:23,985 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:09:23,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:23,985 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:09:23,985 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-10 10:09:23,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1063639688, now seen corresponding path program 1 times [2024-11-10 10:09:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:23,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827687307] [2024-11-10 10:09:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:23,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:09:24,051 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 10:09:24,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:09:24,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827687307] [2024-11-10 10:09:24,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827687307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:09:24,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:09:24,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:09:24,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343719532] [2024-11-10 10:09:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:09:24,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:09:24,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:09:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:09:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:09:24,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-10 10:09:24,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 10:09:24,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:09:24,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-10 10:09:24,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:09:24,239 INFO L124 PetriNetUnfolderBase]: 564/972 cut-off events. [2024-11-10 10:09:24,240 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-11-10 10:09:24,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1970 conditions, 972 events. 564/972 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5009 event pairs, 564 based on Foata normal form. 328/1278 useless extension candidates. Maximal degree in co-relation 425. Up to 876 conditions per place. [2024-11-10 10:09:24,253 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 16 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2024-11-10 10:09:24,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 25 transitions, 102 flow [2024-11-10 10:09:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:09:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:09:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-11-10 10:09:24,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2024-11-10 10:09:24,254 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 92 flow. Second operand 3 states and 55 transitions. [2024-11-10 10:09:24,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 25 transitions, 102 flow [2024-11-10 10:09:24,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 25 transitions, 100 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-10 10:09:24,256 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 68 flow [2024-11-10 10:09:24,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2024-11-10 10:09:24,258 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2024-11-10 10:09:24,258 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 68 flow [2024-11-10 10:09:24,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 10:09:24,259 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:24,259 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2024-11-10 10:09:24,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:09:24,259 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-10 10:09:24,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:24,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1352536171, now seen corresponding path program 1 times [2024-11-10 10:09:24,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:24,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040781553] [2024-11-10 10:09:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:24,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:24,277 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:09:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:24,294 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:09:24,294 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:09:24,294 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-10 10:09:24,294 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-10 10:09:24,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-10 10:09:24,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-10 10:09:24,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-10 10:09:24,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 10:09:24,295 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-10 10:09:24,296 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:09:24,298 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-10 10:09:24,323 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:09:24,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 47 transitions, 122 flow [2024-11-10 10:09:24,334 INFO L124 PetriNetUnfolderBase]: 9/67 cut-off events. [2024-11-10 10:09:24,335 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-10 10:09:24,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 67 events. 9/67 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 153 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 63. Up to 10 conditions per place. [2024-11-10 10:09:24,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 47 transitions, 122 flow [2024-11-10 10:09:24,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 47 transitions, 122 flow [2024-11-10 10:09:24,338 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:09:24,339 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;@266449e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:09:24,342 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-10 10:09:24,345 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:09:24,345 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-10 10:09:24,345 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:09:24,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:24,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:09:24,346 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-10 10:09:24,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 612727175, now seen corresponding path program 1 times [2024-11-10 10:09:24,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:24,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925982602] [2024-11-10 10:09:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:24,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:09:24,420 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 10:09:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:09:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925982602] [2024-11-10 10:09:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925982602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:09:24,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:09:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:09:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327677604] [2024-11-10 10:09:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:09:24,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:09:24,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:09:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:09:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:09:24,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-11-10 10:09:24,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:09:24,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:09:24,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-11-10 10:09:24,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:09:25,150 INFO L124 PetriNetUnfolderBase]: 4064/6094 cut-off events. [2024-11-10 10:09:25,151 INFO L125 PetriNetUnfolderBase]: For 1615/1615 co-relation queries the response was YES. [2024-11-10 10:09:25,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12468 conditions, 6094 events. 4064/6094 cut-off events. For 1615/1615 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 35945 event pairs, 4064 based on Foata normal form. 1953/7930 useless extension candidates. Maximal degree in co-relation 1994. Up to 5626 conditions per place. [2024-11-10 10:09:25,210 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 21 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2024-11-10 10:09:25,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 136 flow [2024-11-10 10:09:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:09:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:09:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-10 10:09:25,212 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-11-10 10:09:25,213 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 122 flow. Second operand 3 states and 70 transitions. [2024-11-10 10:09:25,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 136 flow [2024-11-10 10:09:25,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 32 transitions, 130 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-10 10:09:25,221 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 88 flow [2024-11-10 10:09:25,221 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-11-10 10:09:25,222 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2024-11-10 10:09:25,222 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 88 flow [2024-11-10 10:09:25,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:09:25,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:25,223 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2024-11-10 10:09:25,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 10:09:25,223 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-10 10:09:25,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2002922072, now seen corresponding path program 1 times [2024-11-10 10:09:25,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:25,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909863875] [2024-11-10 10:09:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:25,247 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:09:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:25,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:09:25,279 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:09:25,280 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-10 10:09:25,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-10 10:09:25,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-10 10:09:25,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-10 10:09:25,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-10 10:09:25,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-10 10:09:25,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 10:09:25,281 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-10 10:09:25,281 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:09:25,281 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-10 10:09:25,305 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:09:25,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 57 transitions, 154 flow [2024-11-10 10:09:25,319 INFO L124 PetriNetUnfolderBase]: 11/82 cut-off events. [2024-11-10 10:09:25,319 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-10 10:09:25,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 82 events. 11/82 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 84. Up to 12 conditions per place. [2024-11-10 10:09:25,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 57 transitions, 154 flow [2024-11-10 10:09:25,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 57 transitions, 154 flow [2024-11-10 10:09:25,323 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:09:25,324 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;@266449e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:09:25,325 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 10:09:25,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:09:25,329 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-10 10:09:25,329 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 10:09:25,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:25,330 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:09:25,330 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-10 10:09:25,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:25,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2088555250, now seen corresponding path program 1 times [2024-11-10 10:09:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:25,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555076497] [2024-11-10 10:09:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:09:25,427 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 10:09:25,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:09:25,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555076497] [2024-11-10 10:09:25,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555076497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:09:25,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:09:25,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:09:25,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678217946] [2024-11-10 10:09:25,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:09:25,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:09:25,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:09:25,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:09:25,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:09:25,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-10 10:09:25,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:09:25,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:09:25,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-10 10:09:25,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:09:29,157 INFO L124 PetriNetUnfolderBase]: 26564/36704 cut-off events. [2024-11-10 10:09:29,157 INFO L125 PetriNetUnfolderBase]: For 12550/12550 co-relation queries the response was YES. [2024-11-10 10:09:29,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75579 conditions, 36704 events. 26564/36704 cut-off events. For 12550/12550 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 233514 event pairs, 26564 based on Foata normal form. 11328/47440 useless extension candidates. Maximal degree in co-relation 12616. Up to 34376 conditions per place. [2024-11-10 10:09:29,637 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 26 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2024-11-10 10:09:29,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 39 transitions, 172 flow [2024-11-10 10:09:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:09:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:09:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-10 10:09:29,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49707602339181284 [2024-11-10 10:09:29,641 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 154 flow. Second operand 3 states and 85 transitions. [2024-11-10 10:09:29,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 39 transitions, 172 flow [2024-11-10 10:09:29,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 160 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-10 10:09:29,661 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 108 flow [2024-11-10 10:09:29,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2024-11-10 10:09:29,663 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -10 predicate places. [2024-11-10 10:09:29,664 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 108 flow [2024-11-10 10:09:29,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:09:29,664 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:29,664 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:09:29,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 10:09:29,665 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-10 10:09:29,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1143601650, now seen corresponding path program 1 times [2024-11-10 10:09:29,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:29,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992129547] [2024-11-10 10:09:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:29,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:29,680 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:09:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:29,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:09:29,707 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:09:29,708 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 10:09:29,708 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-11-10 10:09:29,710 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-10 10:09:29,710 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-10 10:09:29,710 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-10 10:09:29,710 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-10 10:09:29,711 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-10 10:09:29,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 10:09:29,711 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-10 10:09:29,712 WARN L244 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:09:29,712 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-11-10 10:09:29,743 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:09:29,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 67 transitions, 188 flow [2024-11-10 10:09:29,758 INFO L124 PetriNetUnfolderBase]: 13/97 cut-off events. [2024-11-10 10:09:29,759 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-10 10:09:29,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 97 events. 13/97 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 240 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 106. Up to 14 conditions per place. [2024-11-10 10:09:29,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 67 transitions, 188 flow [2024-11-10 10:09:29,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 67 transitions, 188 flow [2024-11-10 10:09:29,764 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:09:29,765 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;@266449e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:09:29,765 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-10 10:09:29,768 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:09:29,768 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-10 10:09:29,769 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:09:29,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:29,769 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:09:29,770 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-11-10 10:09:29,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:29,770 INFO L85 PathProgramCache]: Analyzing trace with hash -551786136, now seen corresponding path program 1 times [2024-11-10 10:09:29,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:29,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178746691] [2024-11-10 10:09:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:29,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:09:29,821 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 10:09:29,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:09:29,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178746691] [2024-11-10 10:09:29,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178746691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:09:29,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:09:29,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:09:29,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762119102] [2024-11-10 10:09:29,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:09:29,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:09:29,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:09:29,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:09:29,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:09:29,840 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 67 [2024-11-10 10:09:29,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:09:29,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:09:29,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 67 [2024-11-10 10:09:29,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:09:45,352 INFO L124 PetriNetUnfolderBase]: 164064/214754 cut-off events. [2024-11-10 10:09:45,353 INFO L125 PetriNetUnfolderBase]: For 89975/89975 co-relation queries the response was YES. [2024-11-10 10:09:45,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444255 conditions, 214754 events. 164064/214754 cut-off events. For 89975/89975 co-relation queries the response was YES. Maximal size of possible extension queue 5934. Compared 1434571 event pairs, 164064 based on Foata normal form. 64453/276240 useless extension candidates. Maximal degree in co-relation 76351. Up to 203126 conditions per place. [2024-11-10 10:09:47,526 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 31 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2024-11-10 10:09:47,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 210 flow [2024-11-10 10:09:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:09:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:09:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-10 10:09:47,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4975124378109453 [2024-11-10 10:09:47,529 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 188 flow. Second operand 3 states and 100 transitions. [2024-11-10 10:09:47,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 210 flow [2024-11-10 10:09:47,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 46 transitions, 190 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-11-10 10:09:47,588 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 128 flow [2024-11-10 10:09:47,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2024-11-10 10:09:47,589 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -12 predicate places. [2024-11-10 10:09:47,590 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 128 flow [2024-11-10 10:09:47,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:09:47,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:47,590 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:09:47,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 10:09:47,591 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-11-10 10:09:47,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash 530865513, now seen corresponding path program 1 times [2024-11-10 10:09:47,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:47,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334044327] [2024-11-10 10:09:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:47,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:47,604 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:09:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:09:47,622 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:09:47,623 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:09:47,623 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-10 10:09:47,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-11-10 10:09:47,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2024-11-10 10:09:47,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-11-10 10:09:47,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-11-10 10:09:47,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-11-10 10:09:47,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-11-10 10:09:47,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-11-10 10:09:47,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 10:09:47,627 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-10 10:09:47,627 WARN L244 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:09:47,629 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2024-11-10 10:09:47,663 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:09:47,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 77 transitions, 224 flow [2024-11-10 10:09:47,680 INFO L124 PetriNetUnfolderBase]: 15/112 cut-off events. [2024-11-10 10:09:47,680 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-10 10:09:47,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 112 events. 15/112 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 283 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 129. Up to 16 conditions per place. [2024-11-10 10:09:47,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 77 transitions, 224 flow [2024-11-10 10:09:47,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 77 transitions, 224 flow [2024-11-10 10:09:47,684 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:09:47,685 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;@266449e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:09:47,686 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-10 10:09:47,688 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:09:47,690 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-10 10:09:47,690 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 10:09:47,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:09:47,690 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:09:47,691 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-11-10 10:09:47,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:09:47,691 INFO L85 PathProgramCache]: Analyzing trace with hash 945244711, now seen corresponding path program 1 times [2024-11-10 10:09:47,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:09:47,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116113363] [2024-11-10 10:09:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:47,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:09:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:09:47,725 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 10:09:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:09:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116113363] [2024-11-10 10:09:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116113363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:09:47,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:09:47,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:09:47,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988649486] [2024-11-10 10:09:47,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:09:47,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:09:47,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:09:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:09:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:09:47,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 77 [2024-11-10 10:09:47,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 10:09:47,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:09:47,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 77 [2024-11-10 10:09:47,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand